HomeMy WebLinkAbout12 PUBLIC HEARING 2020 URBAN WATER MANAGEMENT PLAN DocuSign Envelope ID: 1 E2128A4-9002-4441-BADO-59ED70CC63B8
0
• Agenda Item 12
AGENDAREPORT Reviewed: os
City Manager ��
Finance Director
MEETING DATE: JUNE 1, 2021
TO: MATTHEW S. WEST, CITY MANAGER
FROM: DOUGLAS S. STACK, DIRECTOR OF PUBLIC WORKS/CITY ENGINEER
SUBJECT: PUBLIC HEARING 2020 URBAN WATER MANAGEMENT PLAN
SUMMARY
The California Urban Water Management Planning Act of 1983 requires the City to
develop and adopt an Urban Water Management Plan (UWMP) every five years. It
requires urban water suppliers providing water for municipal services of more than 3000
connections or 3000 acre-feet of water production annually, to prepare, conduct a public
hearing, and adopt in accordance with the prescribed requirements of the Act.
RECOMMENDATION
It is recommended that the City Council:
1. Conduct a public hearing for the 2020 Urban Water Management Plan; and
2. Adopt Resolution No. 21-36 approving the City's 2020 Urban Water
Management Plan
FISCAL IMPACT
No fiscal impact associated with this item.
CORRELATION TO THE STRATEGIC PLAN
This effort contributes to the fulfillment of the City's Strategic Plan Goal D: Strong
Community and Regional Relationships. Specifically, the action implements Strategy 2,
which among other things, is to enhance collaboration efforts with agencies within and
outside Tustin on issues of mutual interest and concern.
BACKGROUND
The City provides water to a population of 66,600 throughout its 8.4 square mile services
area. The City receives water from two main sources, the Lower Santa Ana River
Groundwater Basin, which is managed by the Orange County Water District (OCWD),
and imported water from the Municipal Water District of Orange County (MWDOC), via
the East Orange County Water District (EOCWD). Ground water provides roughly ninety
percent of the City's water supply with the additional ten percent made up for in imported
water.
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June 1, 2021
Page 2
The Urban Water Management Planning Act of 1983 (Act) requires "every urban water
supplier providing water for municipal purposes to more than 3,000 customers or
supplying more than 3,000 acre-feet of water annually" to prepare, adopt, and file an
UWMP with the California Department of Water Resources (DWR) every five years, in
years ending in five or zero. Adoption of the UWMP must be completed by July 1 , 2021.
The UWMP is intended to serve as a general, flexible, and open-ended planning
document that is periodically updated to reflect changes in water supply trends
conservation, and water use efficiency policies.
Staff partnered with MWDOC and Arcadis U.S., Inc. to update the UWMP. The 2020
UWMP has been prepared in compliance with the requirements of the Act, as amended,
and revises the adopted 2015 UWMP. The 2020 UWMP, along with the City's Water
Master Plan and other City planning documents will be used by City staff to guide the
City's water use and water management efforts through the planning year 2025, when
the UWMP is again required to be updated.
The attached 2020 UWMP has been duly publicly noticed for review in accordance with
the Act and is recommended for City Council adoption.
VecIs . Stack, P.E.
of Public Works/City Engineer
Attachment(s):
1. 2020 Urban Water Management Plan
2. Resolution No. 21-36
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ATTACHMENT 1
2020 Urban Water Management Plan
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June 2021
DocuSign Envelope ID: 1 E2128A4-9002-4441-BADO-59ED70CC63B8
Tustin 2020 Urban Water Management Plan
2020 URBAN WATER
MANAGEMENT PLAN
Prepared for:
City of Tustin
300 Centennial Way
Sarina Sriboonlue, P.E. Tustin, California 92780
Project Manager
Prepared by:
Arcadis U.S., Inc.
320 Commerce
Suite 200
Irvine
California 92602
Tel 714 730 9052
Fax 714 730 9345
Our Ref:
30055240
Date:
June 2021
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CONTENTS
Acronyms and Abbreviations ......................................................................................................................viii
ExecutiveSummary......................................................................................................................................1
1 Introduction and UWMP Overview.....................................................................................................1-1
1.1 Overview of Urban Water Management Plan Requirements ......................................................1-1
1.2 UWMP Organization....................................................................................................................1-2
2 UWMP Preparation ............................................................................................................................2-1
2.1 Individual Planning and Compliance ...........................................................................................2-1
2.2 Coordination and Outreach .........................................................................................................2-2
2.2.1 Integration with Other Planning Efforts ..................................................................................2-2
2.2.2 Wholesale and Retail Coordination........................................................................................2-4
2.2.3 Public Participation.................................................................................................................2-4
3 System Description ............................................................................................................................3-1
3.1 Agency Overview.........................................................................................................................3-1
3.2 Water Service Area and Facilities ...............................................................................................3-3
3.2.1 Water Service Area................................................................................................................3-3
3.2.2 Water Facilities.......................................................................................................................3-4
3.3 Climate.........................................................................................................................................3-5
3.4 Population, Demographics, and Socioeconomics.......................................................................3-6
3.4.1 Population ..............................................................................................................................3-6
3.4.2 Demographics and Socioeconomics......................................................................................3-6
3.4.3 CDR Projection Methodology.................................................................................................3-7
3.5 Land Uses....................................................................................................................................3-8
3.5.1 Current Land Uses.................................................................................................................3-8
3.5.2 Projected Land Uses..............................................................................................................3-8
4 Water Use Characterization...............................................................................................................4-1
4.1 Water Use Overview....................................................................................................................4-1
4.3.1.1 Weather Variability and Long-Term Climate Change Impacts.......................................4-5
5 Conservation Target Compliance.......................................................................................................5-1
5.1 Baseline Water Use.....................................................................................................................5-1
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5.1.1 Ten to 15-Year Baseline Period (Baseline GPCD)................................................................5-2
5.1.2 Five-Year Baseline Period (Target Confirmation)..................................................................5-2
5.1.3 Service Area Population.........................................................................................................5-2
5.2 SBx7-7 Water Use Targets..........................................................................................................5-2
5.2.1 SBx7-7 Target Methods .........................................................................................................5-3
5.2.2 2020 Targets and Compliance...............................................................................................5-3
5.3 Orange County 20x2020 Regional Alliance ................................................................................5-4
6 Water Supply Characterization ..........................................................................................................6-1
6.1 Water Supply Overview...............................................................................................................6-1
6.2 Imported Water............................................................................................................................6-4
6.2.1 Colorado River Supplies ........................................................................................................6-5
6.2.2 State Water Project Supplies .................................................................................................6-7
6.2.3 Storage.................................................................................................................................6-11
6.2.4 Planned Future Sources ......................................................................................................6-12
6.3 Groundwater..............................................................................................................................6-13
6.3.1 Historical Groundwater Production ......................................................................................6-13
6.3.2 Basin Characteristics ...........................................................................................................6-14
6.3.3 Sustainable Groundwater Management Act........................................................................6-17
6.3.4 Basin Production Percentage...............................................................................................6-17
6.3.4.1 2020 OCWD Groundwater Reliability Plan ..................................................................6-19
6.3.4.2 OCWD Engineer's Report............................................................................................6-19
6.3.5 Recharge Management........................................................................................................6-20
6.3.6 MET Groundwater Replenishment Program........................................................................6-20
6.3.7 MET Conjunctive Use Program/Cyclic Storage Program with OCWD ..............................6-21
6.3.8 Overdraft Conditions ............................................................................................................6-21
6.3.9 Planned Future Sources ......................................................................................................6-22
6.4 Surface Water............................................................................................................................6-22
6.4.1 Existing Sources...................................................................................................................6-22
6.4.2 Planned Future Sources ......................................................................................................6-22
6.5 Stormwater................................................................................................................................6-22
6.5.1 Existing Sources...................................................................................................................6-22
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6.5.2 Planned Future Sources ......................................................................................................6-23
6.6 Wastewater and Recycled Water..............................................................................................6-23
6.6.1 Agency Coordination............................................................................................................6-23
6.6.1.1 OCWD Green Acres Project ........................................................................................6-23
6.6.1.2 OCWD Groundwater Replenishment System..............................................................6-23
6.6.2 Wastewater Description and Disposal .................................................................................6-24
6.6.3 Current Recycled Water Uses..............................................................................................6-25
6.6.4 Projected Recycled Water Uses ..........................................................................................6-25
6.6.5 Potential Recycled Water Uses............................................................................................6-26
6.6.6 Optimization Plan .................................................................................................................6-26
6.7 Desalination Opportunities ........................................................................................................6-27
6.7.1 Ocean Water Desalination ...................................................................................................6-28
6.7.2 Groundwater Desalination....................................................................................................6-30
6.8 Water Exchanges and Transfers...............................................................................................6-30
6.8.1 Existing Exchanges and Transfers.......................................................................................6-30
6.8.2 Planned and Potential Exchanges and Transfers................................................................6-30
6.9 Summary of Future Water Projects ...........................................................................................6-31
6.9.1 City Initiatives .......................................................................................................................6-31
6.9.2 Regional Initiatives...............................................................................................................6-32
6.10 Energy Intensity....................................................................................................................6-33
6.10.1 Water Supply Energy Intensity.........................................................................................6-34
6.10.1.1 Operational Control and Reporting Period...............................................................6-36
6.10.1.2 Volume of Water Entering Processes......................................................................6-36
6.10.1.3 Energy Consumption and Generation......................................................................6-36
6.10.2 Key Findings and Next Steps...........................................................................................6-36
7 Water Service Reliability and Drought Risk Assessment ..................................................................7-1
7.1 Water Service Reliability Overview..............................................................................................7-1
7.2 Factors Affecting Reliability.........................................................................................................7-2
7.2.1 Climate Change and the Environment...................................................................................7-2
7.2.2 Regulatory and Legal.............................................................................................................7-3
7.2.3 Water Quality..........................................................................................................................7-4
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7.2.3.1 Imported Water...............................................................................................................7-4
7.2.3.2 Groundwater...................................................................................................................7-5
7.2.4 Locally Applicable Criteria......................................................................................................7-7
7.3 Water Service Reliability Assessment.........................................................................................7-8
7.3.1 Normal Year Reliability...........................................................................................................7-8
7.3.2 Single Dry Year Reliability......................................................................................................7-9
7.3.3 Multiple Dry Year Reliability...................................................................................................7-9
DWR Submittal Table 7-4 Retail: Multiple Dry Years Supply and Demand Comparison (AF) ...........................7-11
7.4 Management Tools and Options ...............................................................................................7-12
7.5 Drought Risk Assessment.........................................................................................................7-13
7.5.1 DRA Methodology................................................................................................................7-13
7.5.2 Total Water Supply and Use Comparison............................................................................7-15
7.5.3 Water Source Reliability.......................................................................................................7-17
8 Water Shortage Contingency Planning..............................................................................................8-1
8.1 Layperson Description.................................................................................................................8-1
8.2 Overview of the WSCP................................................................................................................8-1
8.3 Summary of Water Shortage Response Strategy and Required DWR Tables...........................8-2
9 Demand Management Measures.......................................................................................................9-1
9.1 Demand Management Measures for Retail Suppliers.................................................................9-1
9.1.1 Water Waste Prevention Ordinances.....................................................................................9-1
9.1.2 Metering .................................................................................................................................9-2
9.1.3 Conservation Pricing..............................................................................................................9-3
9.1.4 Public Education and Outreach..............................................................................................9-3
9.1.5 Programs to Assess and Manage Distribution System Real Loss.........................................9-5
9.1.6 Water Conservation Program Coordination and Staffing Support.........................................9-6
9.1.7 Other Demand Management Measures.................................................................................9-6
9.1.7.1 Residential Program.......................................................................................................9-6
9.1.7.2 CII Programs..................................................................................................................9-7
9.1.7.3 Landscape Programs.....................................................................................................9-8
9.2 Implementation over the Past Five Years..................................................................................9-10
9.3 Water Use Objectives (Future Requirements) ..........................................................................9-12
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10 Plan Adoption, Submittal, and Implementation................................................................................10-1
10.1 Overview ..............................................................................................................................10-1
10.2 Agency Coordination............................................................................................................10-2
10.3 Public Participation...............................................................................................................10-3
10.4 UWMP Submittal..................................................................................................................10-4
10.5 Amending the Adopted UWMP or WSCP............................................................................10-4
11 References.......................................................................................................................................11-1
TABI 7S
Table 2-1: Plan Identification......................................................................................................................2-1
Table 2-2: Supplier Identification ...............................................................................................................2-2
Table 2-3 Retail: Water Supplier Information Exchange............................................................................2-4
Table 3-1: Retail Only: Public Water Systems...........................................................................................3-5
Table 3-2: Retail: Population -Current and Projected...............................................................................3-6
Table 3-3: City of Tustin Service Area Dwelling Units by Type .................................................................3-7
Table 4-1: Retail: Demands for Potable and Non-Potable Water—Actual................................................4-2
Table 4-2: Water Use Projections for 2021 to 2025...................................................................................4-6
Table 4-3: Retail: Use for Potable and Non-Potable Water- Projected ....................................................4-6
Table 4-4: Retail: Total Water Use (Potable and Non-Potable).................................................................4-7
Table 4-5: Retail Only: Inclusion in Water Use Projections .......................................................................4-7
Table 4-6: SCAG 6t" Cycle Household Allocation Based on Median Household Income .........................4-8
Table 4-7: Projected Water Use for Low Income Households (AF)...........................................................4-8
Table 4-8: Retail: Five Years of Water Loss Audit Reporting ....................................................................4-9
Table 5-1: Baselines and Targets Summary..............................................................................................5-3
Table5-2: 2020 Compliance......................................................................................................................5-4
Table 6-1: Retail: Water Supplies—Actual................................................................................................6-2
Table 6-2: Retail: Water Supplies— Projected...........................................................................................6-3
Table 6-3: MET SWP Program Capabilities...............................................................................................6-9
Table 6-4: Retail: Groundwater Volume Pumped....................................................................................6-14
Table 6-5: Management Actions Based on Changes in Groundwater Storage.......................................6-18
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Table 6-6: Retail: Wastewater Collected Within Service Area in 2020...................................................6-25
Table 6-7: Retail: 2020 UWMP Recycled Water Use Projection Compared to 2020 Actual...................6-26
Table 6-8: Recommended Energy Intensity— Multiple Water Delivery Products....................................6-35
Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment) .......................................................7-2
Table 7-2: Retail: Normal Year Supply and Demand Comparison ............................................................7-8
Table 7-3: Retail: Single Dry Year Supply and Demand Comparison.......................................................7-9
Table 7-4: Retail: Multiple Dry Years Supply and Demand Comparison.................................................7-11
Table 7-5: Five-Year Drought Risk Assessment Tables to Address Water Code Section 10635(b).......7-15
Table 8-1: Water Shortage Contingency Plan Levels................................................................................8-3
Table9-1: Water Usage Rates...................................................................................................................9-3
Table 9-2: City of Tustin Water Conservation Efficiency Program Participation......................................9-11
Table 9-3: MWDOC Programs to Assist in Meeting WUO.......................................................................9-13
Table 10-1: External Coordination and Outreach ....................................................................................10-2
Table 10-2: Retail: Notification to Cities and Counties ............................................................................10-3
FIGURES
Figure 3-1: Regional Location of City of Tustin and Other MWDOC Member Agencies...........................3-2
Figure 3-2: City of Tustin Water Service Area ...........................................................................................3-4
Figure 4-1: Water Use Projection Methodology Diagram.........................................................................4-4
Figure 4-2: Water Loss Audit for CY2016—2019....................................................................................4-10
Figure 4-3: Water Loss Performance Indicator for CY2016—2019.........................................................4-10
Figure 6-1: City's Projected Water Supply Sources (AF)...........................................................................6-4
Figure 6-2: Map of the OC Basin .............................................................................................................6-16
Figure8-1: UWMP Overview.....................................................................................................................8-1
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APPENDICES
Appendix A. UWMP Water Code Checklist
Appendix B. DWR Standardized Tables
Appendix C. Reduced Delta Reliance
Appendix D. SBx7-7 Verification and Compliance Forms
Appendix E. 2021 OC Water Demand Forecast for MWDOC and OCWD Technical Memorandum
Appendix F. AWWA Water Loss Audits
Appendix G. 2017 Basin 8-1 Alternative
Appendix H. Water Shortage Contingency Plan
Appendix I. Water Use Efficiency Implementation Report
Appendix J. Demand Management Measures
Appendix K. Notice of Public Hearing
Appendix L. Adopted UWMP Resolution
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ACRONYMS AND ABBREVIATIONS
% Percent
20x2020 20% water use reduction in GPCD by year 2020
ADU Accessory Dwelling Unit
Act Urban Water Management Planning Act of 1983
AF Acre-Feet
AFY Acre-Feet per Year
AWWA American Water Works Association
Biops Biological Opinions
BMP Best Management Practice
CDR Center for Demographic Research at California State University Fullerton
CEE Consortium for Energy Efficiency
CII Commercial/Industrial/Institutional
City City of Tustin
CRA Colorado River Aqueduct
CVP Central Valley Project
CY Calendar Year
DAC Disadvantaged Communities
DCP Delta Conveyance Project
DDW California State Division of Drinking Water
Delta Sacramento-San Joaquin River Delta
DMM Demand Management Measure
DOF Department of Finance
DRA Drought Risk Assessment
DVL Diamond Valley Lake
DWR Department of Water Resources
EOCWD East Orange County Water District
ESA Endangered Species Act
FIRO Forecast Informed Reservoir Operations
FY Fiscal Year
GAP Green Acres Project
GHG Greenhouse Gas
GPCD Gallons per Capita per Day
gpf Gallons per Flush
GSA Groundwater Sustainability Agency
GSP Groundwater Sustainability Plan
GWRS Groundwater Replenishment System
GWRSFE Groundwater Replenishment System Final Expansion
H2O2 Hydrogen Peroxide
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HECW High Efficiency Clothes Washer
HEN High Efficiency Nozzle
HET High Efficiency Toilet
IPR Indirect Potable Reuse
IRP Integrated Water Resources Plan
JADU Junior Accessory Dwelling Unit
kWh Kilowatt-Hour
LRP Local Resources Program
MAF Million Acre-Feet
MCL Maximum Contaminant Level
MET Metropolitan Water District of Southern California
MF Microfiltration
MG Million Gallon
MGD Million Gallons per Day
MHI Median Household Income
MNWD Moulton Niguel Water District
MTBE Methyl Tertiary Butyl Ether
MWDOC Municipal Water District of Orange County
MWELO Model Water Use Efficiency Landscape Ordinance
NDMA N-nitrosodimethylamine
NRW Non-Revenue Water
OC Orange County
OC Basin Orange County Groundwater Basin
OC San Orange County Sanitation District
OCWD Orange County Water District
ORP On-Site Retrofit Program
PFAS Per- and polyfluoroalkyl substances
PFOA perfluorooctanoic acid
PFOS perfluorooctane sulfanate
Poseidon Poseidon Resources LLC
PPCP Pharmaceuticals and Personal Care Product
PPT Parts Per Trillion
PSA Public Service Announcement
QWEL Qualified Water Efficient Landscaper
RA Replenishment Assessment
RHNA Regional Housing Needs Assessment
RO Reverse Osmosis
RUWMP Regional Urban Water Management Plan
SARCCUP Santa Ana River Conservation and Conjunctive Use Program
SBx7-7 Senate Bill 7 as part of the Seventh Extraordinary Session
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SCAB South Coast Air Basin
SCAG Southern California Association of Governments
SCWD South Coast Water District
SDP Seawater Desalination Program
sf Square Feet
SMWD Santa Margarita Water District
SOC South Orange County
STEAM Science Technology Engineering Arts and Mathematics
SWP State Water Project
SWRCB California State Water Resources Control Board
TAF Thousand Acre-Feet
TDS Total Dissolved Solids
USBR United States Bureau of Reclamation
UV Ultraviolet
UWMP Urban Water Management Plan
UWMP Act Urban Water Management Planning Act of 1983
VOC Volatile Organic Compound
Water Code California Water Code
WBIC Weather-Based Irrigation Controller
WF-21 Water Factory 21
WSAP Water Supply Allocation Plan
WSCP Water Shortage Contingency Plan
WSIP Water Savings Incentive Program
WUO Water Use Objective
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EXECUTIVE SUMMARY
INTRODUCTION AND UWMP OVERVIEW
The City of Tustin (City) prepared this 2020 Urban Water Management Plan (UWMP or Plan) to submit
to the California Department of Water Resources (DWR) to satisfy the UWMP Act of 1983 (Act or
UWMP Act) and subsequent California Water Code (Water Code) requirements. The City is a retail water
supplier that provides water to its residents and other customers using the imported potable water from
Municipal Water District of Orange County (MWDOC), obtained through East Orange County Water
District (EOCWD), and local groundwater from the Orange County Groundwater Basin (OC Basin), which
is managed by the Orange County Water District (OCWD).
UWMPs are comprehensive documents that present an evaluation of a water supplier's reliability over a
long-term (20-25 year) horizon. This 2020 UWMP provides an assessment of the present and future
water supply sources and demands within the City's service area. It presents an update to the 2015
UWMP on the City's water resource needs, water use efficiency programs, water reliability assessment
and strategies to mitigate water shortage conditions. It also presents a new 2020 Water Shortage
Contingency Plan (WSCP) designed to prepare for and respond to water shortages. This 2020 UWMP
contains all elements to meet compliance of the new requirements of the Act as amended since 2015.
IWMv vKtr'ARATION
The City coordinated the preparation of this 2020 UWMP with other key entities including MWDOC
(regional wholesale supplier for Orange County), EOCWD (wholesale supplier for the City), Metropolitan
Water District of Southern California ([MET] (regional wholesaler for Southern California and the direct
supplier of imported water to MWDOC)), and OCWD (OC Basin manager). The City also coordinated with
other entities, which provided valuable data for the analyses prepared in this UWMP, such as the Center
for Demographic Research (CDR) at California State University Fullerton for population projections,
through MWDOC's assistance.
The City was incorporated in 1927 and is governed by a Council-Manager form of government.
The City lies in central east Orange County and is bounded by the City of Orange to the north, the City of
Santa Ana to the west, the City of Irvine to the south, and unincorporated areas of Orange County to the
east. The City's water service area covers 8.4 square miles and includes most of the incorporated area
of the City and also the unincorporated county areas north of the City. The City operates 13 wells,
six reservoirs with a combined storage capacity of approximately 13.83 million gallons (MG) and manages
172-mile water mains system with 14,341 service connections.
Lying in the South Coast Air Basin (SCAB), its climate is characterized by Southern California's
"Mediterranean" climate with mild winters, warm summers and moderate rainfall. In terms of land use, the
City is almost built out with predominantly single and multi-family residential units and a few commercial
establishments. Moving forward, the City will continue planning for its Regional Housing Needs Allocation
(RHNA) requirements and there may be an enhanced focus on accessory dwelling units (ADUS) as the
means of affordable housing. The current population of 66,600 is projected to increase by 1.1% over the
next 25 years.
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WATER USE CHARACTERIZATION
Water use within the City's service area has been relatively stable in the past decade with an annual
average of 10,931 acre-feet (AF) for potable use. There is currently no recycled water use within the
City's service area. In FY2019-20, the City's water use was 10,447 AF of potable water(groundwater and
imported). In FY2019-20, the City's water use profile was comprised of 74.8% residential use, 13.9%
commercial, industrial, and institutional (CII), 3.0% large landscape/irrigation, with non-revenue water
(NRW) and other uses comprising about 8.2%.
WATER USE PROJECTIONS: 5-YEAR AND 25-YEAR
Water demand is likely to decrease 3.5% over the next 5 years. In the longer term, water demand is
projected to decrease 1.8% from 2025 through 2045. The projected potable water use for 2045 is 9,898
AF. This demand projection considers such factors as current and future demographics, future water use
efficiency measures, and long-term weather variability.
CONSERVATION TARGET COMPLIANCE
Retail water suppliers are required to comply with the requirements of Water Conservation Act of 2009,
also known as SBx7-7 (Senate Bill 7 as part of the Seventh Extraordinary Session), which was signed
into law in 2010 and requires the State of California to reduce urban water use by 20% by 2020 from a
2013 baseline.
The retail water suppliers can comply individually or as a region in collaboration with other retail water
suppliers, in order to be eligible for water related state grants and loans. The City is part of the Orange
County 20x2020 Regional Alliance created in collaboration with MWDOC, its retail member agencies as
well as the Cities of Anaheim, Fullerton and Santa Ana. The Alliance was created to assist OC retail
agencies in complying with SBx7-7.
The City met its 2020 water use target and is in compliance with SBx7-7; the actual 2020 consumption
was 95 gallons per capita per day (GPCD), which is below its 2020 target of 151 GPCD.
WATER SUPPLY rruAQArrTERIZATION
The City meets its demands through a combination of imported water and local groundwater to meet
its water needs. The City works together with three primary agencies, MWDOC, EOCWD, and OCWD to
ensure a safe and reliable water supply that will continue to serve the community in periods of drought
and shortage. The sources of imported water supplies include water from the Colorado River and the
State Water Project (SWP) provided by MET and delivered through MWDOC and the City's wholesaler
supplier, EOCWD.
In FY 2019-20, the City's water supplies consisted of 96% groundwater and 4% imported water.
It is projected that by 2045, the water supply mix will shift to 85% groundwater and 15% imported water.
Note that these representations of supply match the projected demand. The City can purchase more MET
water through EOCWD / MWDOC, should the need arise.
The City does not provide wastewater services. Instead, its wholesaler, EOCWD, owns and operates the
wastewater collection system in the City's service area. The wastewater is conveyed to Orange County
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Sanitation District(OC San) for treatment and disposal. OCWD's Groundwater Replenishment System
(GWRS) produces recycled water for indirect potable reuse (IPR)through the replenishment of the OC
Basin. The City benefits from this indirect use of recycled water.
WATER SERVICE RELIABILITY AND DROUGHT RISK ASSESSMENT
Every urban water supplier is required to assess the reliability of their water service to its customers under
a normal year, a single dry year, and a drought period lasting five consecutive years. The water service
reliability assessment compares projected supply to projected demand for the three hydrological
conditions between 2025 and 2045. Factors affecting reliability, such as climate change and regulatory
impacts, are accounted for as part of the assessment.
The City depends on a combination of imported and local supplies to meet its water demands and has
taken numerous steps to ensure it has adequate supplies. MET's and MWDOC's 2020 UWMPs conclude
that they can meet full-service demands of their member agencies through 2045 during normal years,
single-dry years, and multiple-dry years. Consequently, the City is projected to meet full-service demands
through 2045 for the same scenarios, due to diversified supply and conservation measures.
The Drought Risk Assessment (DRA) evaluates the City's near-term ability to supply water assuming the
City is experiencing a drought over the next five years. Even under the assumption of a drought over the
next five years, MET's 2020 UWMP concludes a surplus of water supplies would be available to its
Member Agencies, including MWDOC and in effect, the City, should the need for additional supplies arise
to close any local supply gap. Additionally, the City partakes in various efforts to reduce its reliance on
imported water supplies such as increasing the uses of local groundwater and indirect recycled water.
WATER SHORTAGE CONTINGENCY PLANNING
Water shortage contingency planning (WSCP) is a strategic planning process that the City engages in to
prepare for and respond to water shortages. A water shortage, when water supply available is insufficient
to meet the normally expected customer water use at a given point in time, may occur due to a number of
reasons, such as water supply quality changes, climate change, drought, and catastrophic events
(e.g., earthquake). The City's WSCP provides real-time water supply availability assessment and
structured steps designed to respond to actual conditions. This level of detailed planning and preparation
will help maintain reliable supplies and reduce the impacts of supply interruptions.
The WSCP serves as the operating manual that the City will use to prevent catastrophic service
disruptions through proactive, rather than reactive, mitigation of water shortages. The WSCP contains the
processes and procedures that will be deployed when shortage conditions arise so that the City's
governing body, its staff, and its retail agencies can easily identify and efficiently implement
pre-determined steps to mitigate a water shortage to the level appropriate to the degree of water shortfall
anticipated.
EMAND MANAGEMENT MEASURE
The City, along with other retail water agencies in Orange County, recognizes the need to use existing
water supplies efficiently. This ethic of efficient use of water has evolved as a result of the development
and implementation of water use efficiency programs that make good economic sense and reflect
responsible stewardship of the region's water resources. The City participates in regional water savings
programs and works closely with MWDOC to promote regional efficiency.
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PLAN ADOPTION, SUBMITTAL,AND IMPLEMENTATION
The Water Code requires the UWMP to be adopted by the Supplier's governing body. Before the
adoption of the UWMP, the City notified the public and the cities and counties within its service area per
the Water Code and held a public hearing to receive input from the public on the UWMP. Post adoption,
the City submitted the UWMP to DWR and other key agencies and made the document available for
public review no later than 30 days after filing with DWR.
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1 INTRODUCTION AND UWMP OVERVIEW
The City of Tustin (City) prepared this 2020 Urban Water Management Plan (UWMP or Plan) to submit
to the California Department of Water Resources (DWR) to satisfy the UWMP Act of 1983 (Act or
UWMP Act) and subsequent California Water Code (Water Code) requirements. The City is a retail water
supplier that provides water to its residents and other customers using the imported potable water from
Municipal Water District of Orange County (MWDOC), obtained through East Orange County Water
District (EOCWD), and local groundwater from the Orange County Groundwater Basin (OC Basin), which
is managed by the Orange County Water District (OCWD). The City, as one of MWDOC's 28 member
agencies, prepared this 2020 UWMP in collaboration with MWDOC, EOCWD, Metropolitan Water District
of Southern California (MET), OCWD, and other key agencies.
UWMPs are comprehensive documents that present an evaluation of a water supplier's reliability over a
long-term (20-25 year) horizon. In response to the changing climatic conditions and regulatory updates
since the 2015 UWMP, the City has been proactively managing its water supply and demand. The water
loss audit program, water conservation measures and efforts for increased self-reliance in order to reduce
dependency on imported water from the Sacramento-San Joaquin Delta (Delta) are some of the water
management efforts that the City is a part of to maintain the reliability of water supply for its service area.
This 2020 UWMP provides an assessment of the present and future water supply sources and demands
within the City's service area. It presents an update to the 2015 UWMP on City's water resource needs,
water use efficiency programs, water reliability assessment and strategies to mitigate water shortage
conditions. It presents a new 2020 Water Shortage Contingency Plan (WSCP) designed to prepare for
and respond to water shortages. This 2020 UWMP contains all elements to meet compliance of the new
requirements of the Act as amended since 2015.
Overview of Urban Water Management Plan Requirements
The UWMP Act enacted by California legislature requires every urban water supplier(Supplier) providing
water for municipal purposes to more than 3,000 customers or supplying more than 3,000 acre-feet (AF)
of water annually to prepare, adopt, and file an UWMP with DWR every five years in the years ending in
zero and five.
For this 2020 UWMP cycle, DWR placed emphasis on achieving improvements for long term reliability
and resilience to drought and climate change in California. Legislation related to water supply planning in
California has evolved to address these issues, namely Making Conservation a Way of Life
(Assembly Bill [AB] 1668 and Senate Bill [SB] 606) and Water Loss Performance Standard SB555.
New UWMP requirements in 2020 are a direct result of these new water regulations. Two complementary
components were added to the 2020 UWMP. First is the WSCP to assess the Supplier's near term 5-year
drought risk assessment (DRA) and provide a structured guide for the Supplier to deal with water
shortages. Second is the Annual Water Supply Demand Assessment (WSDA)to assess the current year
plus one dry year i.e., short-term demand/supply outlook. Analyses over near- and long-term horizons
together will provide a more complete picture of Supplier's reliability and will serve to inform appropriate
actions it needs to take to build up capacity over the long term.
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The various key new additions in the 2020 UWMP included as a result of the most recent water
regulations are:
• Water Shortage Contingency Plan (WSCP)—WSCP helps a Supplier to better prepare for
drought conditions and provides the steps and water use efficiency measures to be taken in times
of water shortage conditions. WSCP now has more prescriptive elements, including an analysis
of water supply reliability; the water use efficiency measures for each of the six standard water
shortage levels, that correspond to water shortage percentages ranging from 0-10% to greater
than 50%; an estimate of potential to close supply gap for each measure; protocols and
procedures to communicate identified actions for any current or predicted water shortage
conditions; procedures for an annual water supply and demand assessment; monitoring and
reporting requirements to determine customer compliance; reevaluation and improvement
procedures for evaluating the WSCP.
• Drought Risk Assessment—The Suppliers are now required to compare their total water use
and supply projections and conduct a reliability assessment of all their sources for a consecutive
five-year drought period beginning 2021.
• Five Consecutive Dry-Year Water Reliability Assessment—The three-year multiple dry year
reliability assessment in previous UWMPs has now been extended from three to five consecutive
dry years to include a more comprehensive assessment of the reliability of the water sources to
improve preparedness of Suppliers for extended drought conditions.
• Seismic Risk—The UWMP now includes a seismic risk assessment of the water supply
infrastructure and a plan to mitigate any seismic risks on the water supply assets.
• Groundwater Supplies Coordination—The UWMP should be in accordance with the
Sustainable Groundwater Management Act of 2014 and consistent with the Groundwater
Sustainability Plans, wherever applicable.
• Lay Description —To provide a better understanding of the UWMP to the general public, a lay
description of the UWMP is included, especially summarizing the Supplier's detailed water
service reliability assessment and the planned management steps and actions to mitigate any
possible shortage scenarios.
imvir Vrganization
This UWMP is organized into 10 main sections aligned with the DWR Guidebook recommendations.
The subsections are customized to tell the City's story of water supply reliability and ways to overcome
any water shortages over a planning horizon of the next 25 years.
Section 1 Introduction and UWMP Overview gives an overview of the UWMP fundamentals and briefly
describes the new additional requirements passed by the Legislature for 2020 UWMP.
Section 2 UWMP Preparation identifies this UWMP as an individual planning effort of the City, lists the
type of year and units of measure used and introduces the coordination and outreach activities conducted
by the City to develop this UWMP.
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Section 3 System Description gives a background on the City's water system and its climate
characteristics, population projection, demographics, socioeconomics, and predominant current and
projected land uses of its service area.
Section 4 Water Use Characterization provides historical, current, and projected water use by customer
category for the next 25 years within the City's service area and the projection methodology used by
MWDOC to develop the 25-year projections.
Section 5 Conservation Target Compliance reports the SB X7-7 water use conservation target
compliance of the City (individually and as a member of the OC 20x2020 Regional Alliance).
Section 6 Water Supply Characterization describes the current water supply portfolio of the City as well
as the planned and potential water supply projects and water exchange and transfer opportunities.
Section 7 Water Service Reliability and Drought Risk Assessment assesses the reliability of the
City's water supply service to its customers for a normal year, single dry year, and five consecutive dry
years scenarios. This section also includes a DRA of all the supply sources for a consecutive five-year
drought period beginning 2021.
Section 8 Water Shortage Contingency Planning is a brief summary of the standalone
WSCP document(Appendix H) which provides a structured guide for the City to deal with water
shortages, incorporating prescriptive information and standardized action levels, lists the appropriate
actions and water use efficiency measures to be taken to ensure water supply reliability in times of water
shortage conditions, along with implementation actions in the event of a catastrophic supply interruption.
Section 9 Demand Management Measures provides a comprehensive description of the water
conservation programs that the City has implemented, is currently implementing, and plans to implement
in order to meet its urban water use reduction targets.
Section 10 Plan Adoption, Submittal, and Implementation provides a record of the process the City
followed to adopt and implement its UWMP.
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UWMP PREPARATION
The City's 2020 UWMP is an individual UWMP for the City to meet the Water Code compliance as a retail
water supplier. While the City opted to prepare its own UWMP and meet Water Code compliance
individually, the development of this UWMP involved close coordination with MWDOC and its whole
supplier, EOCWD along with other key entities within the region.
Individual Plapning and Compliance
The City opted to prepare its own UWMP (Table 2-1) and comply with the Water Code individually, while
closely coordinating with MWDOC, EOCWD and various key entities as discussed in Section 2.2 to
ensure regional integration. The UWMP Checklist was completed to confirm the compliance of this
UWMP with the Water Code (Appendix A).
One consistency with MWDOC and the majority of its other retail member agencies is that the City
selected to report demands and supplies using fiscal year (FY) basis (Table 2-2).
Table 2-1: Plan Identification
Select Type of Plan Name of RUWMP or Regional Alliance
Only One
❑� Individual UWMP
Water Supplier is also a
member of a RUWMP
Water Supplier is also a
member of a Regional Orange County 20x2020 Regional Alliance
Alliance
Regional Urban Water Management
Plan (RUWMP)
NOTES:
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Table 2-2: Supplier Identification
SubmittalDWR • - 2-3: Supplier Identification
•- of ••
mlzmnolesaler
rVO Supplier is a retailer
wom�- 11181-10111
❑ UWMP Tables are in calendar years
R UWMP Tables are in fiscal years
If using fiscal years provide month and date that the fiscal
year begins (mm/dd)
7/1
Unit AF
NOTES:
The energy intensity data is reported in calendar year
consistent with the Greenhouse Gas Protocol.
2.2 Coordinatioi, aiiu outreach
2.2.1 Integration with Other Planning Efforts
The City, as a retail water supplier, coordinated this UWMP preparation effort with other key entities,
including MWDOC (wholesale supplier for Orange County), EOCWD (wholesale supplier for the City),
MET (regional wholesaler for Southern California and the direct supplier of imported water to MWDOC),
and OCWD (OC Basin manager). The City also developed this Plan in conjunction with other
MWDOC-led efforts such as population projection from the Center for Demographic Research at
California State University Fullerton (CDR).
Some of the key planning and reporting documents that were used to develop this UWMP are:
• MWDOC's 2020 UWMP provides the basis for the projections of the imported supply availability
over the next 25 years for the City's service area.
• MWDOC's 2020 WSCP provides a water supply availability assessment and structured steps
designed to respond to actual conditions that will help maintain reliable supplies and reduce the
impacts of supply interruptions.
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• 2021 OC Water Demand Forecast for MWDOC and OCWD Technical Memorandum
(Demand Forecast TM) provides the basis for water demand projections for MWDOC's member
agencies as well as Anaheim, Fullerton, and Santa Ana.
• MET's 2020 Draft Integrated Water Resources Plan (IRP) is a long-term planning document to
ensure water supply availability in Southern California and provides a basis for water supply
reliability in Orange County.
• MET's 2020 UWMP was developed as a part of the 2020 IRP planning process and was used by
MWDOC as another basis for the projections of supply capability of the imported water received
from MET.
• MET's 2020 WSCP provides a water supply assessment and guide for MET's intended actions
during water shortage conditions.
• OCWD's Groundwater Reliability Plan (to be finalized after July 2021) provides the latest
information on groundwater management and supply projection for the OC Basin, the primary
source of groundwater for 19 retail water suppliers in OC.
• OCWD's 2019-20 Engineer's Report provides information on the groundwater conditions and
basin utilization of the OC Basin.
• OCWD's 2017 Basin 8-1 Alternative is an alternative to the Groundwater Sustainability Plan
(GSP) for the OC Basin and provides significant information related to sustainable management
of the basin in the past and hydrogeology of the basin, including groundwater quality and basin
characteristics.
• Local Hazard Mitigation Plan provides the basis for the seismic risk analysis of the water
system facilities.
• Orange County Local Agency Formation Commission's 2020 Municipal Service Review for
MWDOC Report provides comprehensive review of the municipal services provided by MWDOC.
• Water Master Plan of the City provides information on water infrastructure planning projects and
plans to address any required water system improvements.
Statewide Water Planning
In addition to regional coordination with various agencies described above, the City as a
MWDOC member agency is currently a part of MET's statewide planning effort to reduce reliance
on the water imported from the Delta.
It is the policy of the State of California to reduce reliance on the Delta in meeting California's future water
supply needs through a statewide strategy of investing in improved regional supplies, conservation, and
water use efficiency. This policy is codified through the Delta Stewardship Council's Delta Plan Policy
WR P1 and is measured through Supplier reporting in each Urban Water Management Planning cycle.
WR P1 is relevant to water suppliers that plan to participate in multi-year water transfers, conveyance
facilities, or new diversions in the Delta.
Through significant local and regional investment in water use efficiency, water recycling, advanced water
technologies, local and regional water supply projects, and improved regional coordination of local and
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regional water supply efforts, the City has demonstrated a reduction in Delta reliance and a subsequent
improvement in regional self-reliance. For a detailed description and documentation of the City's
consistency with Delta Plan Policy WR P1 see Section 7.4 and Appendix C.
2.2.2 Wholesale and Retail Coordination
The City developed its UWMP in conjunction with MWDOC and EOCWD's 2020 UWMP. The City obtains
the imported potable water from MWDOC through EOCWD and provided its historical water use and
initial water use projections data to MWDOC (Table 2-3). MWDOC facilitated in refining the projections of
the City's water demand and the imported supply from MWDOC over the next 25 years.
The City also has been taking part in many regional programs administered by MWDOC to assist retail
agencies meet various State compliance, such as the OC Regional Alliance for SB x7-7 compliance,
regional water loss program for SB555 compliance, and regional water use efficiency programs.
Sections 5 and 9 provide detailed information on these programs.
Table 2-3 Retail: Water Supplier Information Exchange
DWR Submittal Table • • Information Exchange
The retail Supplier has informed the following wholesale supplier(s) of projected
water use in accordance with Water Code Section 10631.
Wholesale Water Supplier
East Orange County Water District
Municipal Water District of Orange County
NOTES:
2.2.3 Public Participation
For further coordination with other key agencies and to encourage public participation in the review and
update of this Plan, the City held a public hearing and notified key entities and the public per the Water
Code requirements. Sections 10.2 and 10.3 describe these efforts in detail.
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3 SYSTEM DESCRIPTION
The City was incorporated in 1927 and is governed by a Council-Manager form of government.
The City lies in central east Orange County and is bounded by the City of Orange to the north, the City of
Santa Ana to the west, the City of Irvine to the south, and unincorporated areas of Orange County to the
east. The City's water service area covers 8.4 square miles and includes most of the incorporated area
of the City and also the unincorporated county areas north of the City. The City operates 13 wells,
six reservoirs with a combined storage capacity of approximately 13.83 million gallons (MG) and manages
172-mile water mains system with 14,341 service connections.
Lying in the South Coast Air Basin (SCAB), its climate is characterized by Southern California's
"Mediterranean" climate with mild winters, warm summers and moderate rainfall. In terms of land use, the
City is almost built out with predominantly single and multi-family residential units and a few commercial
establishments. Moving forward, the City will continue planning for its Regional Housing Needs Allocation
(RHNA) requirements and there may be an increase in the construction of accessory dwelling units
(ADUS) as the means of affordable housing. The current population of 66,600 is projected to increase by
only 1.1% over the next 25 years.
Agency Overview
Incorporated in 1927, the City of Tustin is a General Law city and has a Council-Manager form of
government which consists of an elected City Council responsible for policy making, and a professional
City Manager, appointed by the Council. The current members of the City Council are:
• Letitia Clark— Mayor
• Austin Lumbard— Mayor Pro Tem
• Barry W. Cooper—Council Member
• Ryan Gallagher—Council Member
• Rebecca "Beckie" Gomez—Council Member
The City is represented by East Orange County Water District (EOCWD) one of MWDOC's 28 member
agencies purchasing imported water from MWDOC (Orange County's wholesale water supplier and a
member agency of MET)through EOCWD. The City's location within MWDOC's service area is shown on
Figure 3-1.
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Figure 3-1: Regional Location of City of Tustin and Other MWDOC Member Agencies
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3.2 Water Service Area and Facilities
3.2.1 Water Service Area
The City is located in central east Orange County. The City is bounded by the City of Orange to the north,
the City of Santa Ana to the west, the City of Irvine to the south, and unincorporated areas of Orange
County to the east. The City is approximately 35 miles south of Los Angeles and 10 miles inland from the
Pacific Ocean. The City's water service area has an area of 8.4 square miles and an elevation of about
210 feet above sea level. The topography of the City combines generally flat areas with gradual rolling
hills. The City provides potable water service to most of the incorporated area of the City and also to
unincorporated county areas north of the City. A map of the City's water service area is shown as Figure
3-2.
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Figure 3-2: City of Tustin Water Service Area
3.2.2 Water Facilities
The City provides domestic and fire protection water service to most of the incorporated area of the City
and also to unincorporated areas north of the City.
The City has nine untreated or"clear" groundwater wells that pump directly into the distribution system
and two treatment facilities that treat groundwater from four additional wells.
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Elevations in the City's service area are approximately 210 feet above mean sea level (MSL). The water
system is divided into three pressure zones.
The City delivers water supplies through 172 miles of 1.5-inch to 20-inch water mains and three booster
stations. The City pumps its groundwater from 13 wells, including four wells that undergo nitrate and total
dissolved solids (TDS) removal through the Main Street Plant and the 17th Street Desalter Treatment
Plant.
Storage is required to balance variations in demand (operational or regulatory storage), to provide water
for fighting fire (fire storage), and to provide water when normal supplies are reduced or unavailable due
to unusual circumstances (emergency storage). The existing storage system consists of six reservoirs
with a combined storage capacity of approximately 13.83 MG.
The system connections and water volume supplied are summarized in Table 3-1.
Table 3-1: Retail Only: Public Water Systems
DWR Submittal Table • Public Water Systems
Public Water System Public Water System Number of Municipal Volume of
Number Name Connections 2020 Water Supplied
2020
CA3010046 City of Tustin 14,341 10,447
TOTAL 14,341 10,447
NOTES:
The City is located within the SCAB that encompasses all of OC, and the urban areas of Los Angeles,
San Bernardino, and Riverside counties. The SCAB climate is characterized by Southern California's
"Mediterranean" climate: a semi-arid environment with mild winters, warm summers, and moderate
rainfall.
Local rainfall has limited impacts on reducing water demand in the City, except for landscape irrigation
demand. Water that infiltrates into the soil may enter groundwater supplies depending on the local
geography. However, due to the large extent of impervious cover in Southern California, rainfall runoff
quickly flows to a system of concrete storm drains and channels that lead directly to the ocean. OCWD is
one agency that has successfully captured stormwater along the Santa Ana River and in recharge basins
for years and used it as an additional source of supply for groundwater recharge. Based on the
2017 Basin 8-1 Alternative Plan, OCWD captured an average annual stormwater volume of
approximately 44,000 AF over the period of ten years, from Water Year 2006-07 to 2015-16; however,
this period's rainfall was 17% below the long term average using San Bernardino precipitation data.
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Based on a longer period (1989-2015) of rainfall and captured stormwater records, the average year
water budget of OCWD assumes a stormwater capture volume of 52,000 AF.
MET's water supplies come from the State Water Project (SWP) and the Colorado River Aqueduct (CRA),
influenced by climate conditions in northern California and the Colorado River Basin, respectively.
The years 2000-2018 have been the driest 19-year period in the history and both regions have been
receiving record low precipitation which directly impact water supplies to Southern California. Due to the
prolonged drought conditions since 2000, storage within the Colorado River system has declined to half
of its reservoir capacity and has been fluctuating at that level (DWR, January 2020).
Populatioii, Deiiiugraphics, and Socioeconomics
3.4.1 Population
According to CDR, the City's service area has a 2020 population of 66,600, an increase from the
2015 population of 64,068. Overall, the population increases with a minimal growth of 1.1% over the
25-year period from 2020 to 2045. The growth is slightly higher in the first 15 years until 2035 and tapered
off from there. The City's water service area is essentially built-out and most growth is projected to be
from densification of existing communities. Table 3-2 shows the population projections in five-year
increments out to 2045 within the City's service area.
i able 3-2: Retail: Population-Current and Projected
PopulationDWR Submittal Table 3-1 Retail:
00- — .Ate
Population 2020 2025 2030 2035 2040 2045(opt)
Served 66,600 67,121 67,880 67,882 67,849 67,343
NOTES:
Source -Center for Demographic Research at California State University,
Fullerton, 2020
3.4.2 Demographics and Socioeconomics
As shown in Table 3-3 below, the total number of dwelling units in the City is expected to minimally
increase by 0.4% in the next 25 years from 22,495 in 2020 to 22,595 in 2045. Table 3-3 also shows a
breakdown of the total dwelling units by type for the 25-year period from 2020 to 2045.
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Table 3-3: City of Tustin Service Area Dwelling Units by Type
City of Tustin Service Area Dwelling Units by Type
Dwelling Units 2020 2025 2030 2035 2040 2045
Total 22,495 22,593 22,594 22,595 22,595 22,595
Single Family 9,895 9,895 9,895 9,895 9,895 9,895
All Other* 12,600 12,698 12,699 12,700 12,700 12,700
Source: Center for Demographic Research at California State University, Fullerton, 2020
*Includes duplex,triplex, apartment, condo,townhouse, mobile home, etc. Yachts, houseboats,
recreational vehicles, vans, etc. are included if is primary place of residence. Does not include group
quartered units, cars, railroad box cars, etc.
In addition to the types and proportions of dwelling units, various socio-economic factors such as age
distribution, education levels, general health status, income and poverty levels affect City's water
management and planning. Based on the U.S. Census Bureau's QuickFacts, the City has about 10.3% of
population of 65 years and over, 25.2% under the age of 18 years and 7.1% under the age of 5 years.
87% of the City's population with an age of more than 25 years has a minimum of high school graduate
and 43.7% of this age group has at least a bachelor's degree.
3.4.3 CDR Projection Methodology
The City obtains its services area population and dwelling unit data from MWDOC via CDR.
MWDOC contracts with CDR to update the historic population estimates for 2010 to the current year and
provide an annual estimate of population served by each of its retail water suppliers within its service
area. CDR uses GIS and data from the 2000 and 2010 U.S. Decennial Censuses, State Department of
Finance (DOF) population estimates, and the CDR annual population estimates. These annual estimates
incorporate annual revisions to the DOF annual population estimates, often for every year back to the
most recent Decennial Census. As a result, all previous estimates were set aside and replaced with the
most current set of annual estimates. Annexations and boundary changes for water suppliers are
incorporated into these annual estimates.
In the summer of 2020, projections by water supplier for population and dwelling units by type were
estimated using the 2018 Orange County Projections dataset. Growth for each of the five-year increments
was allocated using GIS and a review of the traffic analysis zones (TAZ)with a 2019 aerial photo.
The growth was added to the 2020 estimates by water supplier.
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3.5 Land Uses
3.5.1 Current Land Uses
The City's service area can best be described as a predominantly single and multi-family residential
community located in central Orange County and is mostly built out.
Based on the zoning designation collected and aggregated by Southern California Association of
Governments (SCAG) around 2018, the current land use within the City's service area can be categorized
as follows:
• Single family residential—58.5%
• Multi-family residential— 16.5%
• Commercial—9.9%
• Industrial—3.2%
• Institutional/Governmental—9%
• Open space and parks —0.6%
• Agriculture—0.3%
• Other— 1.8% (e.g., Undevelopable or Protected Land, Water, and Vacant)
• No land use designation— 0.3%
3.5.2 Projected Land Uses
The service area of the City covers 60% of the City and the remaining 40% is the unincorporated County
of Orange. Based on the City's General Plan which covers the entire City and its sphere of influence, the
City at ultimate buildout is projected to have the following distribution of acreage within the various land
use designations:
• Residential—42.6%
• Commercial— 1.5%
• Industrial— 1.5%
• Public—4.1%
• Transportation —5.4%
• Planned Community (consisting of residential, commercial, and public uses)—28.9%
• Specific Plans— 16.0%
Moving forward, the City will continue planning for its RHNA allocation and new developments may
include ADUs beyond 2020.
State law requires jurisdictions to provide their share of the RHNA allocation. SCAG determines the
housing growth needs by income for local jurisdictions through RHNA. The City's RHNA allocation for the
2021 -2029 is 6,782 units. This includes 1,724 units for very low-income households, 1,046 units for
low-income households, 1,132 units for moderate-income households, and 2,880 units for above
moderate-income households.
ADUs are separate small dwellings embedded within residential properties. There has been an increase
in the construction of ADUs in California in response to the rise in interest to provide affordable housing
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supply. The City expects the number of ADUs to continue to grow in the next five years. Currently, the
numbers are minimal. The Legislature updated the ADU law effective January 1, 2020 to clarify and
improve various provisions to promote the development of ADUs. (AB-881, "Accessory dwelling units,"
and AB-68, "Land use: accessory dwelling units") These include:
• allowing ADUs and Junior Accessory Dwelling Units (JADUs) to be built concurrently with a
single-family dwelling. JADUs max size is 500 sf.
• opening areas where ADUs can be created to include all zoning districts that allow single-family
and multi-family uses
• maximum size cannot be less than 850 sf for a one-bedroom ADU or 1,000 sf for more than one
bedroom (California Department of Housing and Community Development, 2020)
About 92% of the ADUs in California are being built in the single family zoned parcels (University of
California Berkeley, 2020). The increase in ADUs implies an increase in number of people per dwelling
unit which translates to potentially higher water demand.
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4 WATER USE CHARACTERIZATION
Water Use Overview
As described in Section 3, the City's service area is almost completely built-out and is projected to add
minimum land use and small population increase. Water use within the City's service area has been
relatively stable in the past decade with an annual average of 10,931 AF for potable use. There is
currently no recycled water use within the City's service area. In FY2019-20, the City's water use was
10,447 AF of potable water (groundwater and imported). In FY2019-20, the City's water use profile was
comprised of 74.8% residential use, 13.9% commercial, industrial, and institutional (CII), 3.0% large
landscape/irrigation, with non-revenue water (NRW) and other uses comprising about 8.2%. As described
in Section 3, the City's service area is almost completely built-out and is projected to add minimum land
use and small population increase. Water demand is likely to decrease 3.5% over the next 5 years. In the
longer term, water demand is projected to decrease 1.8% from 2025 through 2045. The projected potable
water use for 2045 is 9,898 AF. The passive savings are anticipated to continue for the next 25 years and
are considered in the water use projections. Permanent water conservation requirements and water
conservation strategies are discussed in Section 8 and 9 of this document.
Past and Current Water Ust
Water use within the City's service area has been relatively stable in the past decade with an annual
average of 10,931 AF. A stable trend is expected because the city is essentially built-out and the rate of
population growth is small; overall, the population is expected to increase 1.5% from 2020 to 2045. Water
conservation efforts also kept per capita water use down.
As a result of Governor Jerry Brown's mandatory water conservation order in 2014, retail water use within
the City's service area has been decreased from the average of 11,820 AF (FY2010-11 and FY2014-15)
to the last five-year average of 10,043 (FY2015-16 and FY2019-20). Between FY2015-16 and FY2019-
20, water use within the City's service area ranged from 9,098 to 10,887 acre-feet per year (AFY).
All the water use within the City is for potable use and there is currently no recycled water use within the
City's service area. As of FY2019-20, there are 14,341 current customer active and inactive service
connections in the City's water distribution system with all existing connections metered. Table 4-1
summarizes the City's total water use for FY2019-20. Approximately 74.8% of the City's water demand is
residential (single and multi-family combined). Commercial, industrial, and institutional/governmental
accounts for 9.3%, 0.9%, and 3.8% of the total water production, respectively. The City has a mix of
commercial uses (markets, restaurants, etc.), public entities (schools, fire stations and government
offices), office complexes, light industrial, warehouses and facilities serving the public. Large landscape
(irrigation) accounts for about 3.0%, while NRW constitutes 8.2% of total water production. Within the
non-residential sector, commercial uses are the most dominant of the City's total demand.
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Table 4-1: Retail: Demands for Potable and Non-Potable Water—Actual
DWR Submittal Table 4-1 Retail: Demands for Potable and Non-Potable Water -Actual
6 Use •- 2020 Actual dk
E&L--MEARiPitionaescription Level of EqVoume
When Delivered
Single Family Drinking Water 5,364
Multi-Family Drinking Water 2,450
Commercial Drinking Water 968
Industrial Drinking Water 89
Institutional/Governmental Drinking Water 399
Represents large landscape
Landscape (with irrigation meters) Drinking Water 318
served by potable water and
not recycled water
Losses Drinking Water 853
Other Construction Meters and Fire Drinking Water 6
Service Meters
TOTAL 10,447
NOTES:Volumes in AF.
4.3 Water Use Projections
A key component of this 2020 UWMP is to provide an insight into the City's future water demand outlook.
This section discusses the considerations and methodology used to estimate the 25-year water use
projection. Overall, total water demand is projected to decrease 5.3% between 2020 and 2045.
Both single family and multifamily residential use is projected to decrease through 2045. Usage by CII is
projected to increase. Demands for large landscape applications are projected to stay consistent between
2025 and 2045. While projections for the volume of NRW loss decrease through 2045, NRW loss remains
constant as a percentage of total water use.
4.3.1 Water Use Projection Methodology
In 2021, MWDOC and OCWD, in collaboration with their member agencies, led the effort to update water
demand projections originally done as part of the 2021 OC Water Demand Forecast for MWDOC and
OCWD. The updated demand projections, prepared by CDM Smith, were for the Orange County region
as a whole, and provided retail agency specific demands. The projections span the years of 2025-2050
and are based upon information surveyed from each Orange County water agency.
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The forecast methodology began with a retail water agency survey that asked for FY 2017-18, FY 2018-
19 and FY 2019-20 water use by major sector, including number of accounts. If a member agency
provided recycled water to customers that information was also requested. Given that FY 2017-18 was a
slightly above-normal demand year(warmer/drier than average) and FY 2018-19 was a slightly below-
normal demand year(cooler/wetter than average), water use from these two years were averaged to
represent an average-year base water demand.
For the residential sectors (single-family and multifamily)the base year water demand was divided by
households in order to get a total per unit water use (gallons per home per day). In order to split
household water use into indoor and outdoor uses, three sources of information were used, along with
CDM Smith's expertise. The sources of information included: (1) the Residential End Uses of Water
(Water Research Foundation, 2016); (2) California's plumbing codes and landscape ordinances; and (3)
CA DWR's Model Water Efficient Landscape Ordinance (MWELO) calculator.
Three different periods of residential end uses of water were analyzed as follows:
• Pre-2010 efficiency levels — Has an average indoor water use that is considered to be
moderately efficient, also does not include the most recent requirements for MWELO.
• High-efficiency levels— Includes the most recent plumbing codes that are considered to be
highly efficient, and also includes the most recent requirements for MWELO.
• Current average efficiency levels— Represents the weighted average between pre-2010
efficiency and high efficiency levels, based on average age of homes for each retail water
agency.
For outdoor residential water use, the indoor per capita total was multiplied by each member agency-
specific persons per household in order to get an indoor residential household water use (gallons per day
per home), and then was subtracted from the base year total household water use for single-family and
multifamily for each agency based on actual water use as reported by the agency surveys.
For existing residential homes, the current average indoor and outdoor water use for each member
agency were used for the year 2020. It was assumed that indoor water uses would reach the high
efficiency level by 2040. Based on current age of homes, replace ment/remodeling rates, and water utility
rebate programs it is believed this assumption is very achievable. It was also assumed that current
outdoor water use would be reduced by 5% by 2050.
For new homes, the indoor high efficiency level was assumed for the years 2025 through 2050. Outdoor
uses for new homes were assumed to be 25% and 30% lower than current household water use for
single-family and multifamily homes, respectively. This methodology is illustrated in Figure 4-1 below.
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Base Year 2020 2040-2050
indoor Use: Indoor Use:
Water Use Current Efficiency High Efficiency
{agency survey] nHe,'
_ Fatal Unit Use Total Water Use
(gal/home/day) X (2020-2050)
N of Homes
(CDR-) Outdoor Use: Outdoor Use:
Total—Indoor Reduced 5%
2025-2050
Indoor Use:
*CDR=Center for Demographic High Efficiency Future
Research New JX Homes Total Water Use
Customers (CQR} [2025 2050)
**MWELO=CA Model Water Efficient Outdoor Use:
Reduced 25-30%
Landscape Ordinance per MWELO**
Figure 4-1: Water Use Projection Methodology Diagram
Existing and projected population, single-family and multifamily households for each retail water agency
were provided by CDR under contract by MWDOC and OCWD. CDR provides historical and future
demographics by census tracts for all of Orange County (Section 3.4). Census tract data is then clipped
to retail water agency service boundaries in order to produce historical and projected demographic data
by agency.
For the CII water demands, which have been fairly stable from a unit use perspective
(gallons/account/day), it was assumed that the unit demand in FY 2019-20 would remain the same from
2020-2025 to represent COVID-19 impacts. Reviewing agency water use data from FY 2017-18 through
FY2019-20 revealed that residential water use increased slightly in FY 2019-20 while CII demands
decreased slightly as a result of COVID-19. From 2030 to 2050, the average CII unit use from FY 2017-
18 and 2018-19 was used. These unit use factors were then multiplied by an assumed growth of CII
accounts under three broad scenarios:
• Low Scenario—assuming no growth in CII accounts
• Mid Scenario—assuming 0.5% annual growth in CII accounts
• High Scenario—assuming 1.5% annual growth in CII accounts
For most retail agencies, the Mid Scenario of CII account growth was used, but for those retail agencies
that have had faster historical growth the High Scenario was used. For those retail agencies that have
had relatively stable CII water demand, the Low Scenario was used. For the City of Tustin, the mid-
scenario was used.
For those agencies that supply recycled water for non-potable demands, MWDOC used agency-specified
growth assumptions. Most agencies have already maximized their recycled water and thus are not
expecting for this category of demand to grow. However, a few agencies in South Orange County do
expect moderate growth in recycled water customers.
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For large landscape customers served currently by potable water use, MWDOC assumed these demands
to be constant through 2050, except for agencies that have growing recycled water demands. For the
agencies that have growing recycled water demands, large landscape demands served by potable water
reduced accordingly. For non-revenue water, which represents the difference in total water production
less all water billed to customers, this percentage was held constant through 2050. Note that 2050 data
was not presented in the UWMP.
A member agency's water use demand projection is the summation of their residential water demand, CII
demands, large landscape and recycled water demands, and water losses all projected over the 25-year
time horizon. These demands were provided to each of the Orange County water agencies for their
review, feedback, and revision before being finalized.
The MWDOC regional water demand projection was collaboratively developed between MWDOC and its
member agencies. MWDOC's projections were built upon the same model developed by CDM Smith, and
took into consideration specific assumptions and projections provided to MWDOC by its member
agencies.
4.3.1 .1 Weather Variability and Long-Term Climate Change Impacts
In any given year water demands can vary substantially due to weather. In addition, long-term climate
change can have an impact on water demands into the future. For the 2014 OC Water Reliability Study,
CDM Smith developed a statistical model of total water monthly production from 1990 to 2014 from a
sample of retail water agencies. This model removed impacts from population growth, the economy and
drought restrictions in order to estimate the impact on water use from temperature and precipitation.
The results of this statistical analysis are:
• Hot/dry weather demands will be 5.5% greater than current average weather demands
• Cooler/wet weather demands will be 6% lower than current average weather demands
• Climate change impacts will increase current average weather demands by:
0 2% in 2030
0 4% in 2040
0 6% in 2050
4.3.2 25-Year Water Use Projection
These projected demand values were provided by MWDOC and reviewed by the City as part of the
UWMP effort. As the regional wholesale supplier for much of Orange County, MWDOC works in
collaboration with each of its retail agencies as well as MET, its wholesaler, to develop demand
projections for imported water. The City has been proactively decreasing its reliance on imported water by
pursuing a variety of water conservation strategies. Future water savings and low-income water use are
included in these projected values.
4.3.2.1 Water Use Projections for 2021-2025
The water use projection for normal year conditions without drought conditions for 2021-2025 is
presented in Table 4-2. A linear decrease in total water demand is expected between 2021 and 2025.
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This table will be adjusted to estimate the five-years' cumulative drought effects as described in the
five-year DRA in Section 7.
Table 4-2:Water Use Projections for 2021 to 2025
Water
FY Ending 2021 2022 2023 2024 2025
Total Water Demand (AF)
10,374 10,301 10,228 10,155 10,081
NOTES:
4.3.2.2 Water Use Projections for 2025-2045
Table 4-3 is a projection of the City's water demand for 2025-2045. Both single family and multifamily
residential use is projected to decrease, by 5.1% and 6.3%, respectively. Usage by Cl I is projected to
increase by 17.3% between 2025 and 2045. CII projections for 2025 through 2045 were broken down into
commercial, industrial, and institutional/governmental using proportions reported for each billing sector in
FY 2019-20. Demands for large landscape applications are projected to stay consistent, while projections
for NRW loss decrease slightly.
The demand data presented in this section accounts for passive savings in the future. Passive savings
are water savings as a result of codes, standards, ordinances and public outreach on water conservation
and higher efficiency fixtures. Passive savings are anticipated to continue through 2045 and will result in
continued water saving and reduced consumption levels. Permanent water conservation requirements
and water conservation strategies are discussed in Section 8 and 9 of this document.
Table 4-3: Retail: Use for Potable and Non-Potable Water-Projected
' Additional ' M'
Rh
Description 2025 2030 2035 2040 2045
Single Family 5,193 5,114 5,035 4,955 4,930
Multi-Family 2,375 21323 2,272 2,221 2,217
Institutional/Governmental 398 444 456 467 467
Commercial 965 1,078 1,105 1,132 1,132
Industrial 89 99 101 104 104
Landscape 338 338 338 338 338
Losses Non-revenue 723 725 719 712 709
water
TOTAL 10,081 10,122 10,025 9,929 9,898
NOTES: Volumes in AF.
Based on the information provided above, the total demand for potable water is listed below in Table 4-4.
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Table 4-4: Retail: Total Water Use (Potable and Non-Potable)
(PotableDWR Submittal Table 4-3 Retail:Total Gross Water Use . • . .
2020 2025 2030 2035 2040 2045
Potable Water, Raw, Other
10,447 10,081 10,122 10,025 9,929 9,898
Non-potable
Recycled Water Demand 0 0 0 0 0 0
TOTAL WATER USE 10,447 10,081 10,122 10,025 9,929 9,898
NOTES: Volumes in AF.
The City has been proactively decreasing its reliance on imported water by pursuing a variety of water
conservation strategies. Future water savings and low-income water use are included in these projected
values (Table 4-5). Table 4-5
Table 4-5: Retail Only: Inclusion in Water Use Projections
. •• . , • N Irs M.N RVIR • •
Are Future Water Savings Included in Projections?
(Refer to Appendix K of UWMP Guidebook) Yes
If"Yes" to above, state the section or page number, in the cell
to the right,where citations of the codes, ordinances, etc. Section 8 and 9
utilized in demand projections are found.
Are Lower Income Residential Demands Included in
Yes
Projections?
NOTES:
4.3.2.3 Water Use Projections for Lower Income Households
Since 2010, the UWMP Act has required retail water suppliers to include water use projections for single-
family and multi-family residential housing for lower income and affordable households. This will assist the
City in complying with the requirement under Government Code Section 65589.7 granting priority for
providing water service to lower income households. A lower income household is defined as a
household earning below 80% of the Median Household Income (MHI).
DWR recommends retail suppliers rely on the housing elements of city or county general plans to quantify
planned lower income housing with the City's service area (DWR, 2020). RHNA assists jurisdictions in
updating general plan's housing elements section. The RHNA identifies additional housing needs and
assesses households by income level for the City through 2010 decennial Census and 2005-2009
American Community Survey data. The sixth cycle of the RHNA covers the planning period of October
2021 to October 2029. The SCAG adopted the RHNA Allocation Plan for this cycle on March 4, 2021.
The California Department of Housing and Community Development reviewed the housing elements data
submitted by jurisdictions in the SCAG region and concluded the data meets statutory requirements for
the assessment of current housing needs.
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Under the assumption that the RHNA household allocations adequately represent ratios of the City's
overall future income categories (not the exact ratio of all household by income but a conservative one for
low-income household estimates), the RHNA low-income percentage can be used to estimate future low
income demands. One objective of RHNA is to increase affordable housing, therefore RHNA has been
allocating additional low-income households to various regions. Because relying on the RHNA distribution
of households by income category is likely to produce an overestimate of low-income water demands, this
approach represents a conservative projection of future low-income water use.
Table 4-6 presents the City's RHNA housing allocation. RHNA classifies low income housing into two
categories: very low income (<30% - 50% MH I), and low income (51% -80% MH I). Altogether 40.8% of
the City's allocated housing need for the planning period of October 2021 to October 2029 are considered
low-income housing (SCAG, 2021).
Table 4-6: SCAG 6t" Cycle Household Allocation Based on Median Household Income
Household Category by Numberof
Income Households
Households
Very Low Income 1,724 25.4%
Low Income 1,046 15.4%
Moderate Income 1,132 16.7%
Above Moderate Income 2,880 42.5%
Total Future Allocated
6,782 100.0
Households
By applying the percentage of low-income housing from the SCAG report to the total projected SF/MF
residential demand calculated in Table 4-3 above, low-income demand can be conservatively estimated
for both SF and MF through 2045. For example, the total low-income single family residential demand is
projected to be 2,121 AF in 2025 and 2,013 AF in 2045 (Table 4-7).
Table 4-7: Projected Water Use for Low Income Households (AF)
ater Use Sector FY Ending
&025 dift 2035141
Total Residential Demand (AF) 7,568 7,437 7,307 7,176 7,147
Single-Family Residential Demand - 2,121 2,089 2,056 2,024 2,013
Low Income Households (AF)
Multi-Family Residential Demand -
Low Income Households (AF) 970 949 928 907 906
Total Low Income Households
3,091 3,038 2,984 2,931 2,919
Demand(AF)
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4 Water Loss
The City has conducted annual water loss audit since 2015 per the AWWA(American Water Works
Association) methodology per SB 555 to understand the relationship between water loss, operating costs,
and revenue losses.
NRW for CY2016—2019
Figure 4-2) consists of three components: real losses (e.g., leakage in mains and service lines, and
storage tank overflows), apparent losses (unauthorized consumption, customer metering inaccuracies
and systematic data handling errors), and unbilled water (e.g., hydrant flushing, firefighting, and blow-off
water from well start-ups). The City's real losses ranged from 244 AFY to 799 AFY and apparent losses
ranged from 155 AFY to 203 AFY from CY2016-2019. The unbilled water ranged from 3 AFY to 123 AFY
during the same timeframe.
In the CY2019 water audit, the City's total water loss was 434 AFY (Table 4-8) compared to the total
water use of 10,215 AF during that time. The total water loss consists of real loss of 244 AFY and
apparent loss of 190 AFY in CY2019. The NRW was 558 AFY. The active and inactive service
connections were consistent from CY2016-2019 with 14,165 connections in CY2019. The real loss
performance indicator was 15 gals/connection/day in CY2019. Figure 4-3 presents the performance
indicators of gallons of real and apparent loss per connection per day. Understanding and controlling
water loss from a distribution system is an effective way for the City to achieve regulatory standards and
manage their existing resources. The California State Water Resources Control Board is still developing
water loss performance standards; these standards have not yet been adopted.
fable 4-8: Retail: Five Years of Water Loss Audit Reporting
SubmittalDWR • of •
Audit Reporting
Reporting Period Start Date Volume of Water Loss 1,2
■ (mm/yyyy)
01/2016 782
01/2017 963
01/2018 558
01/2019 434
1 Taken from the field"Water Losses"(a combination of apparent losses and real IR
losses)from the AWWA worksheet.
z Units of measure(AF, CCF,MG)must remain consistent throughout the UWMP
as reported in Table 2-3.
NOTES: Water loss in AFY. No water loss audit data for CY or FY 2015.
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1200
1000
F 800
0 600
d
400
200
0
2016 2017 2016 2019
Year
■ Real Loss ■ Apparent Loss ■ Unbilled Water
Figure 4-2:Water Loss Audit for CY2016—2019
F-60
50
rTc 40
Z
c
ami 30
c
c
O
V
20
10
0
2016 2017 2018 2019
Year
■Real Loss a Apparent Loss
Figure 4-3:Water Loss Performance Indicator for CY2016—2019
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5 CONSERVATION TARGET COMPLIANCE
The Water Conservation Act of 2009, also known as SBx7-7 (Senate Bill 7 as part of the
Seventh Extraordinary Session), signed into law on February 3, 2010, requires the State of California
to reduce urban water use by 20% by the year 2020 (20x2020). To achieve this each retail urban water
supplier must determine baseline water use during their baseline period and target water use for the
years 2015 and 2020 to meet the state's water reduction goal. Retail water suppliers are required to
comply with SBx7-7 individually or as a region in collaboration with other retail water suppliers, or
demonstrate they have a plan or have secured funding to be in compliance, in order to be eligible for
water related state grants and loans on or after July 16, 2016.
The City's actual 2020 water use is lower than its 2020 water use target, therefore, demonstrating
compliance with SBx7-7. In its 2015 UWMP, the City revised its baseline per capita water use calculations
using 2010 U.S. Census data. Changes in the baseline calculations resulted in updated per capita water
use targets.
The following sections describe the efforts by the City to comply with the requirements of SBx7-7 and
efforts by MWDOC to assist retail agencies, including the formation of a Regional Alliance to provide
additional flexibility to all water suppliers in Orange County. A discussion of programs implemented to
support retail agencies in achieving their per capita water reduction goals is covered in Section 9—
Demand Management Measures of this UWMP.
Complimentary to information presented in this section are SBx7-7 Verification and Compliance Forms, a
set of standardized tables required by DWR to demonstrate compliance with the Water Conservation Act
in this 2020 UWMP (Appendix D) including calculations of recycled water used for groundwater recharge
(indirect reuse) to offset a portion of the agency's potable demand when meeting the regional as well as
individual water use targets.
oasenne Water Use
The baseline water use is the City's gross water use divided by its service area population, reported in
GPCD. Gross water use is a measure of water that enters the distribution system of the supplier over a
12-month period with certain allowable exclusions. These exclusions are:
• Recycled water delivered within the service area
• Indirect recycled water
• Water placed in long term storage
• Water conveyed to another urban supplier
• Water delivered for agricultural use
• Process water
Water suppliers within the OCWD Groundwater Basin, including the City, have the option of choosing to
deduct recycled water used for indirect potable reuse (IPR) from their gross water use to account for the
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recharge of recycled water into the OC Basin by OCWD, historically through Water Factory 21 (WF-21),
and now by the Groundwater Replenishment System (GWRS).
Water suppliers must report baseline water use for two baseline periods, the 10-to 15-year baseline
(baseline GPCD) and the five-year baseline (target confirmation) as described below.
5.1.1 Ten to 15-Year Baseline Period (Baseline GPCD)
The first step to calculating the City's water use targets is to determine its base daily per capita water use
(baseline water use). The baseline water use is calculated as a continuous (rolling) 10-year average
during a period, which ends no earlier than December 31, 2004 and no later than December 31, 2010.
Water suppliers whose recycled water made up 10% or more of their 2008 retail water delivery can use
up to a 15-year average for the calculation. Recycled water use was less than 10% of the City's retail
delivery in 2008; therefore, a 10-year baseline period is used.
The City's baseline water use is 189 GPCD, obtained from the 10-year period July 1, 1996 to June 30,
2005.
5.1.2 Five-Year Baseline Period (Target Confirmation)
Water suppliers are required to calculate water use, in GPCD, for a five-year baseline period.
This number is used to confirm that the selected 2020 target meets the minimum water use reduction
requirements. Regardless of the compliance option adopted by the City, it will need to meet a minimum
water use target of 5% reduction from the five-year baseline water use. This five-year baseline water use
is calculated as a continuous five-year average during a period, which ends no earlier than December 31,
2007 and no later than December 31, 2010. The City's five-year baseline water use is 184 GPCD,
obtained from the five-year period July 1, 2003 to June 30, 2008.
5.1.3 Service Area Population
The City's service area boundaries correspond with the boundaries for a city or census designated place.
This allows the City to use service area population estimates prepared by the DOF. CDR is the entity
which compiles population data for Orange County based on DOF data. The calculation of the City's
baseline water use and water use targets in the 2010 UWMP was based on the 2000 U.S. Census
population numbers obtained from CDR. The baseline water use and water use targets in the
2015 UWMP were revised based on the 2010 U.S. Census population obtained from CDR in 2012. That
baseline remained in use in the 2020 calculations. The population numbers were revised in this 2020
UWMP per CDR's most recently adjusted population numbers for 2001 onward. Additionally, the City's
2020 service area population was updated based on the addition of 7,000 people previously served by
I RWD.
SBx7-7 Water Use Tarqet
In the 2020 UWMP, the City may update its 2020 water use target by selecting a different target method
than what was used previously. The target methods and determination of the 2015 and 2020 targets are
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described below. The City selected Option 1 consistent with 2015 but its 2020 target water use was
adjusted as a result of the adjusted population and baseline water use values.
5.2.1 SBx7-7 Target Methods
DWR has established four target calculation methods for urban retail water suppliers to choose from.
The City is required to adopt one of the four options to comply with SBx7-7 requirements.
The four options include:
• Option 1 requires a simple 20% reduction from the baseline by 2020 and 10% by 2015.
• Option 2 employs a budget-based approach by requiring an agency to achieve a performance
standard based on three metrics
0 Residential indoor water use of 55 GPCD
0 Landscape water use commensurate with the Model Landscape Ordinance
0 10% reduction in baseline CII water use
• Option 3 is to achieve 95% of the applicable state hydrologic region target as set forth in the
State's 202020 Water Conservation Plan.
• Option 4 requires the subtraction of Total Savings from the baseline GPCD:
0 Total savings includes indoor residential savings, meter savings, CII savings, and landscape
and water loss savings.
With MWDOC's assistance in the calculation of the City's base daily per capita use and water use targets,
the City selected to comply with Option 1 consistent with the option selected in 2010 and 2015.
5.2.2 2020 Targets and Compliance
Under Compliance Option 1, the simple 20% reduction, the City's 2020 target is 151 GPCD as
summarized in Table 5-1. In addition, the confirmed 2020 target needs to meet a minimum of 5%
reduction from the five-year baseline water use.
Table 5-1: Baselines and Targets Summary
SubmittalDWR • and Targets Summary
From • Form
etail Supplier or Regional Alliance Only
Baseline Average Confirmed
Period Start Year * End Year * Baseline 2020 Target*
GPCD
10-15
1996 2005 189
year
151
5 Year 2004 2008 184
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DWR Submittal Table 5-1 Baselines and Targets Summary
From SB X7-7 Verification Form
*All cells in this table should be populated manually from the supplier's
SBX7-7 Verification Form and reported in Gallons per Capita per Day
(GPCD)
NOTES:
The City's actual 2020 consumption is 95 GPCD which is below its 2020 target of 151 GPCD (Table 5-2).
The City met its 2020 water use target and is in compliance with SBx7-7.
Table 5-2: 2020 Compliance
DWR Submittal Table 2020 Compliance From2020 Compliance Form
Retail Supplier or Regional Alliance Only AL IM
2020 GPCD AmEnd
Did Supplier
2020 Confirmed Achieve Targeted
Actual 2020 2020 TOTAL Adjusted 2020 Target GPCD* Reduction for
GPCD* Adjustments* GPCD* 2020?Y/N
95 0 95 151 Y
*All cells in this table should be populated manually from the supplier's SBX7-7 2020 Compliance Form and
reported in Gallons per Capita per Day(GPCD)
NOTES:
' Orange County 20x2020 Regional Alliance
A retail supplier may choose to meet the SBx7-7 targets on its own or it may form a regional alliance with
other retail suppliers to meet the water use target as a region. Within a Regional Alliance, each retail
water supplier will have an additional opportunity to achieve compliance under both an individual target
and a regional target.
• If the Regional Alliance meets its water use target on a regional basis, all agencies in the alliance
are deemed compliant.
• If the Regional Alliance fails to meet its water use target, each individual supplier will have an
opportunity to meet their water use targets individually.
The City is a member of the Orange County 20x2020 Regional Alliance formed by MWDOC, its
wholesaler. This regional alliance consists of 29 retail agencies in Orange County as described in
MWDOC's 2020 UWMP. MWDOC provides assistance in the calculation of each retail agency's baseline
water use and water use targets.
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In 2015, the regional baseline and targets were revised to account for any revisions made by the retail
agencies to their individual 2015 and 2020 targets. The regional water use target is the weighted average
of the individual retail agencies' targets (by population). The Orange County 20x2020 Regional Alliance
weighted 2020 target is 159 GPCD. The actual 2020 water use in the region is 109 GPCD, i.e., the region
met its 2020 GPCD goal.
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R SUPPLY CHARACTERIZATION
As a counterpart to Section 4's Water Use Characterization, this section characterizes the City's water
supply. This section includes identification and quantification of water supply sources through 2045,
descriptions of each water supply source and their management, opportunities for exchanges and
transfers, and discussion regarding any planned future water supply projects. This section also includes
the energy intensity of the water service, a new UWMP requirement.
Water Supply Overviev%
The City meets its demands with a combination of imported water and local groundwater to meet its water
needs. The City works together with three primary agencies, MWDOC, EOCWD, and OCWD to ensure a
safe and reliable water supply that will continue to serve the community in periods of drought and
shortage. The sources of imported water supplies include water from the Colorado River and the SWP
provided by MET and delivered through MWDOC and the City's wholesaler supplier, EOCWD.
The City's main source of water supply is groundwater from the OC Basin. Imported water makes up the
rest of the City's water supply portfolio. In FY 2019-20, the City relied on 96% groundwater and 4%
imported water(Table 6-1).
It is projected that by 2045, the water supply mix will change to approximately 85% groundwater and
15% imported water(Table 6-2 and Figure 6-1). Note that these representations of supply match the
projected demand. However, the City can purchase more MET water through EOCWD/MWDOC, should
the need arise. Additionally, GWRS supplies are included as part of groundwater pumping numbers.
The following subsections provide a detailed discussion of the City's water sources as well as the future
water supply portfolio for the next 25 years.
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Table 6-1: Retail:Water Supplies—Actual
bmittal Table 6-8 Retail: Water"WR
Supplies
Additional Detail on
Water Supply Actual Volume Water
(AF) Quality
Orange County Drinking
Groundwater (not desalinated) Groundwater Basin 7,034 Water
Desalinated Water-Groundwater Desalters 3,038 Drinking
Water
Purchased or Imported Water MWDOC/ EOCWD 375
Drinking
Water
Total 10,447
NOTES:
Source—OC Retail Water Usage FY 2015 to FY 2020(MWDOC, 2020) and City of Tustin (Desalter
volumes)
Desalinated water that is pumped above the Basin Production Percentage (BPP) is BEA-exempt,
meaning there are no penalties for pumping over the BPP. Imported MET/ MWDOC water is
purchased from the City's Wholesale Provider, East Orange County Water District (EOCWD).
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Table 6-2: Retail:Water Supplies—Projected
SuppliesSubmittal Table 6-9 Retail: Water
SupplyProjected Water
JAdditional 2025 2030 2035 2040 2045
•• Detail on Water
Supply Reasonably Reasonably Reasonably Reasonably Reasonably
Available Available Available Available Available
Volume Volume Volume Volume Volume
Groundwater (not Orange County
desalinated) Groundwater 8,569 8,604 8,521 8,440 8,413
Basin
Purchased or MWDOC/ 1,512 1,518 1,504 1,489 1,485
Imported Water EOCWD
Total 10,081 10,122 10,025 9,929 9,898
NOTES:
Source—CDM Smith, 2021
Groundwater volumes assume OCWD's basin production percentage (BPP)to be 85%for all years. Desalinated
groundwater is not included in this table based on the assumption that the contract between the City and OCWD
that classify the City's desalinated water as BEA-exempt is not renewed in FY 2022-23. Volumes of groundwater
and imported water may vary depending on OCWD's actual BPP projections, which are established annually as
well as the outcome of the City and OCWD contract renewal. Imported MET/ MWDOC water is purchased from
the City's Wholesale Provider, East Orange County Water District (EOCWD).
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100%
90%
80%
70%
60%
50%
40%
30%
20°/0
10%
0%
2025 2030 2035 2040 -'10-15
■Groundwater a Imported Water
Figure 6-1: City's Projected Water Supply Sources(AF)
6.2 Imported Water
The City supplements its local groundwater with imported water purchased from EOCWD (who purchases
from MET through MWDOC). In FY 2019-20, the City relied on 375 AFY—approximately 4% of the
City's water supply portfolio for FY 2019-20—of imported water from EOCWD to meet its demands.
MET's principal sources of water are the Colorado River via the CRA and the Lake Oroville watershed in
Northern California through the SWP. For Orange County, the water obtained from these sources is
treated at the Robert B. Diemer Filtration Plant located in Yorba Linda. Typically, the Diemer Filtration
Plant receives a blend of Colorado River water from Lake Mathews through the MET Lower Feeder and
SWP water through the Yorba Linda Feeder.
The City maintains three imported water connections to the MET system. Imported water is purchased
from EOCWD through each of these connections. Water purchased through OC-43 is distributed directly
into the City's system, while water purchased through the other two connections (OC-48 and OC-70) is
also distributed to EOCWD's four other retail customers: the City of Orange, Golden State Water
Company (GSWC), Irvine Ranch Water District (IRWD), and the EOCWD Retail Zone.
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6.2.1 Colorado River Supplies
Background
The Colorado River was MET's original source of water after MET's establishment in 1928.
The CRA, which is owned and operated by MET, transports water from the Colorado River to its terminus
Lake Mathews, in Riverside County. The actual amount of water per year that may be conveyed
through the CRA to MET's member agencies is subject to the availability of Colorado River water.
Approximately 40 million people rely on the Colorado River and its tributaries for water with 5.5 million
acres of land using Colorado River water for irrigation. The CRA includes supplies from the
implementation of the Quantification Settlement Agreement and its related agreements to transfer water
from agricultural agencies to urban uses. The 2003 Quantification Settlement Agreement enabled
California to implement major Colorado River water conservation and transfer programs, in order to
stabilize water supplies and reduce the state's demand on the river to its 4.4 million acre-feet (MAF)
entitlement. Colorado River transactions are potentially available to supply additional water up to the
CRA capacity of 1.25 MAF on an as-needed basis. Water from the Colorado River or its tributaries is
available to users in California, Arizona, Colorado, Nevada, New Mexico, Utah, Wyoming, and Mexico.
California is apportioned the use of 4.4 MAF of water from the Colorado River each year plus one-half of
any surplus that may be available for use collectively in Arizona, California, and Nevada. In addition,
California has historically been allowed to use Colorado River water apportioned to, but not used by,
Arizona or Nevada. MET has a basic entitlement of 550,000 AFY of Colorado River water, plus surplus
water up to an additional 662,000 AFY when the following conditions exists (MET, 2021):
• Water is unused by the California holders of priorities 1 through 3
• Water is saved by the Palo Verde land management, crop rotation, and water supply program
• When the U.S. Secretary of the Interior makes available either one or both of the following:
o Surplus water
o Colorado River water that is apportioned to but unused by Arizona and/or Nevada.
Current Conditions and Supply
MET has not received surplus water for a number of years. The Colorado River supply faces current and
future imbalances between water supply and demand in the Colorado River Basin due to long-term
drought conditions. Analysis of historical records suggests a potential change in the relationship between
precipitation and runoff in the Colorado River Basin. The past 21 years (1999-2020) have seen an overall
drying trend, even though the period included several wet or average years. The river basin has
substantial storage capacity, but the significant reduction in system reservoir storage in the last two
decades is great enough to consider the period a drought (DWR, 2020a). At the close of 2020, system
storage was at or near its lowest since 2000, so there is very little buffer to avoid a shortage from any
future period of reduced precipitation and runoff(MET, 2021). Looking ahead, the long-term imbalance in
the Colorado River Basin's future supply and demand is projected to be approximately 3.2 MAF by the
year 2060 (USBR, 2012).
Over the years, MET has helped fund and implement various programs to improve Colorado River supply
reliability and help resolve the imbalance between supply and demand. Implementation of such programs
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have contributed to achievements like achieving a record low diversion of the Colorado River in 2019, a
level not seen since the 1950s. Colorado River water management programs include:
• Imperial Irrigation District /MET Conservation Program— Under agreements executed in
1988 and 1989, this program allows MET to fund water efficiency improvements within Imperial
Irrigation District's service area in return for the right to divert the water conserved by those
investments. An average of 105,000 AFY of water has been conserved since the program's
implementation.
• Palo Verde Land Management, Crop Rotation, and Water Supply Program —Authorized in
2004, this 35-year program allows MET to pay participating farmers to reduce their water use,
and for MET to receive the saved water. Over the life of the program, an average of 84,500 AFY
has been saved and made available to MET.
• Bard Seasonal Fallowing Program —Authorized in 2019, this program allows MET to pay
participating farmers in Bard to reduce their water use between the late spring and summer
months of selected years, which provides up to 6,000 AF of water to be available to MET in
certain years.
• Management of MET-Owned Land in Palo Verde—Since 2001, MET has acquired
approximately 21,000 acres of irrigable farmland that are leased to growers, with incentives to
grow low water-using crops and experiment with low water-consumption practices. If long-term
water savings are realized, MET may explore ways to formally account them for Colorado River
supplies.
• Southern Nevada Water Authority (SNWA) and MET Storage and Interstate Release
Agreement— Entered in 2004, this agreement allows SNWA to store its unused, conserved
water with MET, in exchange for MET to receive additional Colorado River water supply. MET
has relied on the additional water during dry years, especially during the 2011-2016 California
drought, and SNWA is not expected to call upon MET to return water until after 2026.
• Lower Colorado Water Supply Projects —Authorized in 1980s, this project provides up to
10,000 AFY of water to certain entities that do not have or have insufficient rights to use Colorado
River water. A contract executed in 2007 allowed MET to receive project water left unused by the
project contractors along the River—nearly 10,000 AF was received by MET in 2019 and is
estimated for 2020.
• Exchange Programs— MET is involved in separate exchange programs with the United States
Bureau of Reclamation, which takes place at the Colorado River Intake and with San Diego
County Water Authority (SDCWA), which exchanges conserved Colorado River water.
• Lake Mead Storage Program — Executed in 2006, this program allows MET to leave excessively
conserved water in Lake Mead, for exclusive use by MET in later years.
• Quagga Mussel Control Program — Developed in 2007, this program introduced surveillance
activities and control measures to combat quagga mussels, an invasive species that impact the
Colorado River's water quality.
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• Lower Basin Drought Contingency Plan—Signed in 2019, this agreement incentivizes storage
in Lake Mead through 2026 and overall, it increases MET's flexibility to fill the CRA as needed
(MET, 2021).
Future Programs /Plans
The Colorado River faces long-term challenges of water demands exceeding available supply with
additional uncertainties due to climate change. Climate change impacts expected in the Colorado River
Basin include the following:
• More frequent, more intense, and longer lasting droughts, which will result in water deficits
• Continued dryness in the Colorado River Basin, which will increase the likelihood of triggering a
first-ever shortage in the Lower Basin
• Increased temperatures, which will affect the percentage of precipitation that falls as rain or snow,
as well as the amount and timing of mountain snowpack (DWR, 2020b)
Acknowledging the various uncertainties regarding reliability, MET plans to continue ongoing programs,
such as those listed earlier in this section. Additionally, MET supports increasing water recycling in the
Colorado River Basin and is in the process of developing additional transfer programs for the future
(MET, 2021).
6.2.2 State Water Project Supplies
Background
The SWP consists of a series of pump stations, reservoirs, aqueducts, tunnels, and power plants
operated by DWR and is an integral part of the effort to ensure that business and industry, urban and
suburban residents, and farmers throughout much of California have sufficient water. Water from the
SWP originates at Lake Oroville, which is located on the Feather River in Northern California. Much of
the SWP water supply passes through the Delta. The SWP is the largest state-built, multipurpose,
user-financed water project in the United States. Nearly two-thirds of residents in California receive at
least part of their water from the SWP, with approximately 70% of SWP's contracted water supply going
to urban users and 30% to agricultural users. The primary purpose of the SWP is to divert and store water
during wet periods in Northern and Central California and distribute it to areas of need in Northern
California, the San Francisco Bay area, the San Joaquin Valley, the Central Coast, and Southern
California (MET, 2021).
The Delta is key to the SWP's ability to deliver water to its agricultural and urban contractors. All but
five of the 29 SWP contractors receive water deliveries below the Delta (pumped via the Harvey O. Banks
or Barker Slough pumping plants). However, the Delta faces many challenges concerning its long-term
sustainability such as climate change posing a threat of increased variability in floods and droughts.
Sea level rise complicates efforts in managing salinity levels and preserving water quality in the Delta to
ensure a suitable water supply for urban and agricultural use. Furthermore, other challenges include
continued subsidence of Delta islands, many of which are below sea level, and the related threat of a
catastrophic levee failure as the water pressure increases, or as a result of a major seismic event.
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Current Conditions and Supply
"Table A"water is the maximum entitlement of SWP water for each water contracting agency.
Currently, the combined maximum Table A amount is 4.17 million acre-feet per year (AFY). Of this
amount, 4.13 million AFY is the maximum Table A water available for delivery from the Delta. On
average, deliveries are approximately 60% of the maximum Table A amount (DWR, 2020b).
SWP contractors may receive Article 21 water on a short-term basis in addition to Table A water if
requested. Article 21 of SWP contracts allows contractors to receive additional water deliveries only
under specific conditions, generally during wet months of the year (December through March). Because a
SWP contractor must have an immediate use for Article 21 supply or a place to store it outside of the
SWP, there are few contractors like MET that can access such supplies.
Carryover water is SWP water allocated to an SWP contractor and approved for delivery to the contractor
in a given year, but not used by the end of the year. The unused water is stored in the SWP's share of
San Luis Reservoir, when space is available, for the contractor to use in the following year.
Turnback pool water is Table A water that has been allocated to SWP contractors that has exceeded their
demands. This water can then be purchased by another contractor depending on its availability.
SWP Delta exports are the water supplies that are transferred directly to SWP contractors or to San Luis
Reservoir storage south of the Delta via the Harvey O. Banks pumping plant. Estimated average annual
Delta exports and SWP Table A water deliveries have generally decreased since 2005, when Delta
export regulations affecting SWP pumping operations became more restrictive due to federal biological
opinions (Biops). The Biops protect species listed as threatened or endangered under the federal and
state Endangered Species Acts (ESAs) and affect the SWP's water delivery capability because they
restrict SWP exports in the Delta and include Delta outflow requirements during certain times of the year,
thus reducing the available supply for export or storage.
Before being updated by the 2019 Long-Term Operations Plan, the prior 2008 and 2009 Biops resulted
in an estimated reduction in SWP deliveries of 0.3 MAF during critically dry years to 1.3 MAF in above
normal water years as compared to the previous baseline. However, the 2019 Long-Term Operations
Plan and Biops are expected to increase SWP deliveries by an annual average of 20,000 acre-feet as
compared to the previous Biops (MET, 2021). Average Table A deliveries decreased in the
2019 SWP Final Delivery Capability Report compared to 2017, mainly due to the 2018 Coordinated
Operation Agreement(COA)Addendum and the increase in the end of September storage target for
Lake Oroville. Other factors that also affected deliveries included changes in regulations associated with
the Incidental Take Permit (ITP) and the Reinitiation of Consultation for Long-Term Operations (RoC on
LTO), a shift in Table A to Article 21 deliveries which occurred due to higher storage in SWP San Luis,
and other operational updates to the SWP and federal Central Valley Project (CVP) (DWR, 2020b).
Since 2005, there are similar decreasing trends for both the average annual Delta exports and the
average annual Table A deliveries (Table 6-3).
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Table 6-3: MET SWP Program Capabilities
DeltaAverage Annual
ExportsDeliveries2005 2.96 2.82
2013 2.61 2.55
2019 2.52 2.41
Percent Change* -14.8% -14.3%
`Percent change is between the years 2019 and 2005.
Ongoing regulatory restrictions, such as those imposed by the Biops on the effects of SWP and the
CVP operations on certain marine life, also contribute to the challenge of determining the SWP's water
delivery reliability. In dry, below-normal conditions, MET has increased the supplies delivered through the
California Aqueduct by developing flexible CVP/SWP storage and transfer programs. The goal of the
storage/transfer programs is to develop additional dry-year supplies that can be conveyed through the
available Harvey O. Banks pumping plant capacity to maximize deliveries through the California Aqueduct
during dry hydrologic conditions and regulatory restrictions. In addition, the California State Water
Resources Control Board (SWRCB) has set water quality objectives that must be met by the
SWP including minimum Delta outflows, limits on SWP and CVP Delta exports, and maximum allowable
salinity level.
The following factors affect the ability to estimate existing and future water delivery reliability:
• Water availability at the source: Availability can be highly variable and depends on the amount
and timing of rain and snow that fall in any given year. Generally, during a single-dry year or two,
surface and groundwater storage can supply most water deliveries, but multiple-dry years can
result in critically low water reserves. Fisheries issues can also restrict the operations of the
export pumps even when water supplies are available.
• Water rights with priority over the SWP: Water users with prior water rights are assigned
higher priority in DWR's modeling of the SWP's water delivery reliability, even ahead of
SWP Table A water.
• Climate change: Mean temperatures are predicted to vary more significantly than previously
expected. This change in climate is anticipated to bring warmer winter storms that result in less
snowfall at lower elevations, reducing total snowpack. From historical data, DWR projects that by
2050, the Sierra snowpack will be reduced from its historical average by 25 to 40%. Increased
precipitation as rain could result in a larger number of"rain-on-snow" events, causing snow to
melt earlier in the year and over fewer days than historically, affecting the availability of water for
pumping by the SWP during summer. Furthermore, water quality may be adversely affected due
to the anticipated increase in wildfires. Rising sea levels may result in potential pumping cutbacks
on the SWP and CVP.
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• Regulatory restrictions on SWP Delta exports: The Biops protect special-status species such
as delta smelt and spring-and winter-run Chinook salmon and imposed substantial constraints on
Delta water supply operations through requirements for Delta inflow and outflow and export
pumping restrictions. Restrictions on SWP operations imposed by state and federal agencies
contribute substantially to the challenge of accurately determining the SWP's water delivery
reliability in any given year (DWR, 2020b).
• Ongoing environmental and policy planning efforts: Governor Gavin Newsom ended
California WaterFix in May 2019 and announced a new approach to modernize Delta
Conveyance through a single tunnel alternative. The EcoRestore Program aims to restore at least
30,000 acres of Delta habitat, with the near-term goal of making significant strides toward that
objective by 2020 (DWR, 2020b).
• Delta levee failure: The levees are vulnerable to failure because most original levees were
simply built with soils dredged from nearby channels and were not engineered. A breach of
one or more levees and island flooding could affect Delta water quality and SWP operations for
several months. When islands are flooded, DWR may need to drastically decrease or even cease
SWP Delta exports to evaluate damage caused by salinity in the Delta.
Operational constraints likely will continue until a long-term solution to the problems in the Bay-Delta
is identified and implemented. New Biops for listed species under the Federal ESA or by the California
Department of Fish and Game's issuance of incidental take authorizations under the Federal ESA and
California ESA might further adversely affect SWP and CVP operations. Additionally, new litigation,
listings of additional species or new regulatory requirements could further adversely affect
SWP operations in the future by requiring additional export reductions, releases of additional water
from storage or other operational changes impacting water supply operations.
Future Programs /Plans
MET's Board approved a Delta Action Plan in June 2007 that provides a framework for staff to pursue
actions with other agencies and stakeholders to build a sustainable Delta and reduce conflicts between
water supply conveyance and the environment. The Delta Action Plan aims to prioritize immediate
short-term actions to stabilize the Delta while an ultimate solution is selected, and mid-term steps to
maintain the Delta while a long-term solution is implemented. Currently, MET is working towards
addressing four elements: Delta ecosystem restoration, water supply conveyance, flood control
protection, and storage development.
In May 2019, Governor Newsom ended California WaterFix, announced a new approach to modernize
Delta Conveyance through a single tunnel alternative, and released Executive Order 10-19 that directed
state agencies to inventory and assess new planning for the project. DWR then withdrew all project
approvals and permit applications for California WaterFix, effectively ending the project. The purpose of
the Delta Conveyance Project (DCP) gives rise to several project objectives (MET, 2021). In proposing to
make physical improvements to the SWP Delta conveyance system, the project objectives are:
• To address anticipated rising sea levels and other reasonably foreseeable consequences of
climate change and extreme weather events.
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• To minimize the potential for public health and safety impacts from reduced quantity and quality
of SWP water deliveries, and potentially CVP water deliveries, south of the Delta resulting from a
major earthquake that causes breaching of Delta levees and the inundation of brackish water into
the areas in which existing pumping plants operate.
• To protect the ability of the SWP, and potentially the CVP, to deliver water when hydrologic
conditions result in the availability of sufficient amounts, consistent with the requirements of state
and federal law.
• To provide operational flexibility to improve aquatic conditions in the Delta and better manage
risks of further regulatory constraints on project operations.
6.2.3 Storage
Storage is a major component of MET's dry year resource management strategy. MET's likelihood of
having adequate supply capability to meet projected demands, without implementing its Water Supply
Allocation Plan (WSAP), is dependent on its storage resources. Due to the pattern of generally drier
hydrology, the groundwater basins and local reservoirs have dropped to low operating levels and remain
below healthy storage levels. For example, the Colorado River Basin's system storage at the close of
2020, was at or near its lowest since 2000, so there is very little buffer to avoid a shortage from any future
period of reduced precipitation and runoff(MET, 2021).
MET stores water in both DWR and MET surface water reservoirs. MET's surface water reservoirs are
Lake Mathews, Lake Skinner, and Diamond Valley Lake (DVL), which have a combined storage capacity
of over 1 MAF. Approximately 650,000 AF are stored for seasonal, regulatory, and drought use, while
approximately 370,000 AF are stored for emergency use.
MET also has contractual rights to DWR surface Reservoirs, such as 65 thousand acre-feet (TAF) of
flexible storage at Lake Perris (East Branch terminal reservoir) and 154 TAF of flexible storage at
Castaic Lake (West Branch terminal reservoir)that provides MET with additional options for managing
SWP deliveries to maximize the yield from the project. This storage can provide MET with up to 44 TAF
of additional supply over multiple dry years, or up to 219 TAF to Southern California in a single dry year
(MET, 2021).
MET endeavors to increase the reliability of water supplies through the development of flexible storage
and transfer programs including groundwater storage (MET, 2021). These include:
• Lake Mead Storage Program: Executed in 2006, this program allows MET to leave excessively
conserved water in Lake Mead, for exclusive use by MET in later years. MET created
"Intentionally Created Surplus" (ICS) water in 2006-2007, 2009-2012, and 2016-2019, and
withdrew ICS water in 2008 and 2013-2015. As of January 1, 2021, MET had a total of 1.3 MAF
of Extraordinary Conservation ICS water.
• Semitropic Storage Program: The maximum storage capacity of the program is 350 TAF, and
the minimum and maximum annual yields available to MET are 34.7 TAF and 236.2 TAF,
respectively. The specific amount of water MET can expect to store in and subsequently receive
from the program depends on hydrologic conditions, any regulatory requirements restricting
MET's ability to export water for storage and demands placed by other program participants.
During wet years, MET has the discretion to use the program to store portions of its SWP
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supplies which are in excess, and during dry years, the Semitropic Water Storage District returns
MET's previously stored water to MET by direct groundwater pump-in or by exchange of surface
water supplies.
• Arvin-Edison Storage Program: The storage program is estimated to deliver 75 TAF, and the
specific amount of water MET can expect to store in and subsequently receive from the program
depends on hydrologic conditions and any regulatory requirements restricting MET's ability to
export water for storage. During wet years, MET has the discretion to use to program to store
portions of its SWP supplies which are in excess, and during dry years, the Arvin-Edison Water
Storage District returns MET's previously stored water to MET by direct groundwater pump-in or
by exchange of surface water supplies.
• Antelope Valley-East Kern (AVEK)Water Agency Exchange and Storage Program: Under
the exchange program, for every two AF MET receives, MET returns 1 AF back to AVEK, and
MET will also be able to store up to 30 TAF in the AVEK's groundwater basin, with a dry-year
return capability of 10 TAF.
• High Desert Water Bank Program: Under this program, MET will have the ability to store up to
280 TAF of its SWP Table A or other supplies in the Antelope Valley groundwater basin, and in
exchange will provide funding for the construction of monitoring and production wells, turnouts
from the California Aqueduct, pipelines, recharge basins, water storage, and booster pump
facilities. The project is anticipated to be in operation by 2025.
• Kern-Delta Water District Storage Program: This groundwater storage program has 250 TAF
of storage capacity, and water for storage can either be directly recharged into the groundwater
basin or delivered to Kern-Delta Water District farmers in lieu of pumping groundwater. During dry
years, the Kern-Delta Water District returns MET's previously stored water to MET by direct
groundwater pump-in return or by exchange of surface water supplies.
• Mojave Storage Program: MET entered into a groundwater banking and exchange transfer
agreement with Mojave Water Agency that allows for the cumulative storage of up to 390 TAF.
The agreement allows for MET to store water in an exchange account for later return.
6.2.4 Planned Future Sources
Beyond the programs highlighted in Sections 6.2.1 through 6.2.3, MET continues to invest in efforts to
meet its goal of long-term regional water supply reliability, focusing on the following:
• Continuing water conservation
• Developing water supply management programs outside of the region
• Developing storage programs related to the Colorado River and the SWP
• Developing storage and groundwater management programs within the Southern California
region
• Increasing water recycling, groundwater recovery, stormwater, and seawater desalination
• Pursuing long-term solutions for the ecosystem, regulatory and water supply issues in the
California Bay-Delta (MET, 2021).
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.7f0UF1UWa1ef
Historically, local groundwater has been the cheapest and most reliable source of supply for the City.
In FY 2019-20, the City relied on approximately 10,072 AFY—approximately 96% of the City's water
supply portfolio for FY 2019-20—from the OC Basin to meet its demands.
This section describes the OC Basin and the management measures taken by OCWD, the basin
manager to optimize local supply and minimize overdraft. This section also provides information on
historical groundwater production as well as a 25-year projection of the City's groundwater supply.
The OCWD was formed in 1933 by a special legislative act of the California State Legislature to protect
and manage the County's vast, natural, groundwater supply using the best available technology and
defend its water rights to the OC Basin. This legislation is found in the State of California Statutes,
Water— Uncodified Acts, Act 5683, as amended. The OC Basin is managed by OCWD under the Act,
which functions as a statutorily-imposed physical solution. The OCWD Management Area includes
approximately 89% of the land area of the OC Basin, and 98% of all groundwater production occurs
within the area. OCWD monitors the basin by collecting groundwater elevation and quality data from wells
and manages an electronic database that stores water elevation, water quality, production, recharge,
and other data on over 2,000 wells and facilities within and outside OCWD boundaries (City of La Habra
et al., 2017).
Groundwater levels are managed within a safe basin operating range to protect the long-term
sustainability of the OC Basin and to protect against land subsidence. OCWD regulates groundwater
levels in the OC Basin by regulating the annual amount of pumping and setting the Basin Production
Percentage (BPP) for the water year. As defined in the District Act, the BPP is the ratio of water produced
from groundwater supplies within the district to all water produced within the district from both
supplemental sources and groundwater within the district (OCWD, 2020).
6.3.1 Historical Groundwater Production
The City pumps groundwater through its thirteen operating wells. The City experienced three years of
stability, with a slight decrease in groundwater volume pumped in FY 2017-18, and then an increase in
FY 2019-20 (Table 6-4). Of the City's wells, nine are untreated groundwater wells and the remaining
four wells treat nitrate and TDS, thus earning a BEA exemption to pump over the BPP.
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Table 6-4: Retail: Groundwater Volume Pumped
Groundwater Type Location or Basin Name 2019 2020
Alluvial Basin Orange County Groundwater 7,544 8,466 6,174 8,976 10,072
Basin
TOTAL 7,544 8,466 6,174 8,976 10,072
NOTES:
Source - OC Retail Water Usage FY 2015 to FY 2020 (MWDOC, 2020)
6.3.2 Basin Characteristics
The OC Basin underlies the northerly half of Orange County beneath broad lowlands. The OC Basin is
managed by OCWD covers an area of approximately 350 square miles, bordered by the Coyote and
Chino Hills to the north, the Santa Ana Mountains to the northeast, and the Pacific Ocean to the
southwest. The OC Basin boundary extends to the Orange County-Los Angeles Line to the northwest,
where groundwater flows across the county line into the Central Groundwater Basin of Los Angeles
County. A map of the OC Basin is shown on Figure 6-2. The total thickness of sedimentary rocks in the
OC Basin is over 20,000 feet, with only the upper 2,000 to 4,000 feet containing fresh water.
The OC Basin's full volume is approximately 66 MAF.
There are three major aquifer systems that have been subdivided by OCWD, the Shallow Aquifer System,
the Principal Aquifer System, and the Deep Aquifer System. These three aquifer systems are
hydraulically connected as groundwater is able to flow between each other through intervening aquitards
or discontinuities in the aquitards. The Shallow Aquifer system occurs from the surface to approximately
250 feet below ground surface. Most of the groundwater from this aquifer system is pumped by small
water systems for industrial and agricultural use. The Principal Aquifer system occurs at depths between
200 and 1,300 feet below ground surface. Over 90% of groundwater production is from wells that are
screened within the Principal Aquifer system. Only a minor amount of groundwater is pumped from the
Deep Aquifer system, which underlies the Principal Aquifer system and is up to 2,000 feet deep in the
center of the OC Basin.
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PFAS are a group of thousands of manmade chemicals that includes perfluorooctanoic acid (PFOA) and
perfluorooctane sulfonate (PFOS). PFAS compounds were once commonly used in many products
including, among many others, stain- and water-repellent fabrics, nonstick products (e.g., Teflon),
polishes, waxes, paints, cleaning products, and fire-fighting foams. Beginning in the summer of 2019, the
California State Division of Drinking Water (DDW) began requiring testing for PFAS compounds in some
groundwater production wells in the OCWD area.
Groundwater production in FY 2019-20 was expected to be approximately 325,000 AF but declined to
286,550 AF primarily due to PFAS impacted wells being turned off around February 2020. OCWD
expects groundwater production to be in the area of 245,000 AF in FY 2020-21 due to the currently idled
wells and additional wells being impacted by PFAS and turned off. As PFAS treatment systems are
constructed, OCWD expects total annual groundwater production to slowly increase back to normal levels
(310,000 to 330,000 AF) (OCWD, 2020).
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Figure 6-2: Map of the OC Basin
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6.3.3 Sustainable Groundwater Management Act
In 2014, the State of California adopted the Sustainable Groundwater Management Act (SGMA) to help
manage its groundwater sustainably, and limit adverse effects such as significant groundwater-level
declines, land subsidence, and water quality degradation. SGMA requires all high-and medium-priority
basins, as designated by DWR, be sustainably managed. DWR designated the non-adjudicated Coastal
Plain of OC Basin ("Basin 8-1" or"Basin") as a medium-priority basin, primarily due to heavy reliance on
the Basin's groundwater as a source of water supply. Compliance with SGMA can be achieved in one of
two ways:
1) A Groundwater Sustainability Agency (GSA) is formed and a GSP is adopted, or
2) Special Act Districts created by statute, such as OCWD, and other agencies may prepare and
submit an Alternative to a GSP (City of La Habra et al., 2017).
The agencies within Basin 8-1, led by OCWD collaborated to submit an Alternative to a GSP in 2017,
titled the "Basin 8-1 Alternative"to meet SGMA compliance. This document will be updated every
five years. The current(2017) version is included in Appendix G.
6.3.4 Basin Production Percentage
Background
The OC Basin is not adjudicated and as such, pumping from the OC Basin is managed through a process
that uses financial incentives to encourage groundwater producers to pump a sustainable amount of
water. The framework for the financial incentives is based on establishing the BPP, the percentage of
each Producer's total water supply that comes from groundwater pumped from the OC Basin.
Groundwater production at or below the BPP is assessed the Replenishment Assessment (RA).
While there is no legal limit as to how much an agency pumps from the OC Basin, there is a financial
disincentive to pump above the BPP. The BPP is set uniformly for all Producers by OCWD on an annual
basis. Agencies that pump above the BPP are charged the RA plus the Basin Equity Assessment (BEA).
The BEA is presently calculated so that the cost of groundwater production is equivalent to the cost of
importing potable water supplies. This approach serves to discourage, but not eliminate, production
above the BPP, and the BEA can be increased to discourage production above the BPP if necessary.
The BPP is set based on groundwater conditions, availability of imported water supplies, and Basin
management objectives. The supplies available for recharge must be estimated for a given year.
The supplies of recharge water that are estimated are: 1) Santa Ana River stormflow, 2) Natural incidental
recharge, 3) Santa Ana River baseflow, 4) GWRS supplies, and 5) other supplies such as imported water
and recycled water purchased for the Alamitos Barrier. The BPP is a major factor in determining the cost
of groundwater production from the OC Basin for that year. The BPP set for Water Year 2021-22 is 77%.
BPP Adjustments for Basin Management
OCWD has established management guidelines that are used to establish future BPPs, as seen in Table
6-5. Raising or lowering the BPP allows OCWD to manage the amount of pumping from the basin. OCWD
has a policy to manage the groundwater basin within a sustainable range to avoid adverse impacts to the
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basin. OCWD seeks to maintain some available storage space in the basin to maximize surface water
recharge when such supplies are available, especially in relatively wet years. By keeping the basin
relatively full during wet years, and for as long as possible in years with near-normal recharge, the
maximum amount of groundwater could be maintained in storage to support pumping in future drought
conditions. During dry hydrologic years when less water would be available for recharge, the BPP could
be lowered to maintain groundwater storage levels. A component of OCWD's BPP policy is to manage
the groundwater basin so that the BPP will not fluctuate more that 5% from year to year.
Based on most recent modeling of water supplies available for groundwater recharge and water demand
forecasts, OCWD anticipates being able to sustain the BPP at 85% starting in 2025. The primary reasons
for the higher BPP are the expected completion of the GWRS Final Expansion (GWRSFE) in 2023 and
the relatively low water demands of approximately 400,000 AFY.
Modeling and forecasts generate estimates based on historical averages. Consequently, forecasts use
average hydrologic conditions which smooth the dynamic and unpredictable local hydrology. Variations in
local hydrology are the most significant impact to supplies of water available to recharge the groundwater
basin. The BPP projection of 85% is provided based upon average annual rainfall weather patterns. If the
City were to experience a relatively dry period, the BPP could be reduced to maintain water storage
levels, by as much as 5%.
Table 6-5: Management Actions Based on Changes in Groundwater Storage
Available Storage • .
(amount below full basin Considered Basin Management Action
condition,
Less than 100,000 Raise BPP
100,000 to 300,000 Maintain and/or raise BPP towards 75% goal
300,000 to 350,000 Seek additional supplies to refill basin and/or lower the BPP
Greater than 350,000 Seek additional supplies to refill basin and lower the BPP
BPP Exemptions
In some cases, OCWD encourages pumping and treating groundwater that does not meet drinking water
standards in order to protect water quality. This is achieved by using a financial incentive called the
BEA Exemption. A BEA Exemption is used to promote beneficial uses of poor-quality groundwater and
reduce or prevent the spread of poor-quality groundwater into non-degraded aquifer zones. OCWD uses
a partial or total exemption of the BEA to compensate a qualified participating agency or Producer for the
costs of treating poor quality groundwater, which typically include capital, interest and operations and
maintenance costs for treatment facilities. When OCWD authorizes a BEA exemption for a project, it is
obligated to provide the replenishment water for the production above the BPP and forgo the
BEA revenue that OCWD would otherwise receive from the producer (City of La Habra et al., 2017).
Similarly, for proactive water quality management, OCWD exempts a portion of the BEA for their Coastal
Pumping Transfer Program (CPTP). The CPTP encourages inland groundwater producers to increase
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pumping and coastal producers to decrease pumping in order to reduce the groundwater basin drawdown
at the coast and protect against seawater intrusion. Inland pumpers can pump above the BPP without
having to pay the full BEA for the amount pumped above the BPP (OCWD, 2015). Coastal pumpers
receive BEA revenue from OCWD to assist in offsetting their additional water supply cost from taking less
groundwater.
6.3.4.1 2020 OCWD Groundwater Reliability Plan
In order to adapt to the substantial growth in water demands in OCWD's management area, it is
paramount to anticipate and understand future water demands and develop projects to increase future
water supplies proactively to match demands. The GRP is a continuation of these planning efforts that
estimates the OC Basin's sustainable average annual production and extrapolates water needs of the OC
Basin by combining recently completed water demand projections and modeling of Santa Ana River flows
available for recharge. These data will be used to evaluate future water supply projects and guide
management of the OC Basin. OCWD is currently developing the GRP, and the first public draft is
expected to be available May 2021.
Current water demand projections show a relatively slow increase over the 25-year planning horizon,
which is generally of similar magnitude as the additional production from the GWRSFE in early 2023.
Once complete, the GWRSFE will increase capacity from 100,000 to 134,000 AFY of high-quality
recycled water. This locally controlled, drought proof supply of water reduces the region's dependance on
imported water.
Historically, the Santa Ana River has served as the primary source of water to recharge the OC Basin.
To determine the availability of future Santa Ana River flows, OCWD utilized surface water flow modeling
of the upper watershed. Modeling was developed to predict the impacts future stormwater capture and
wastewater recycling projects in the upper watershed would have on future Santa Ana River flow rates at
Prado Dam. Santa Ana River base flows are expected to decrease as more water recycling projects are
built in the upper watershed. OCWD continues to work closely with the US Army Corps of Engineers to
temporarily impound and slowly release up to approximately 20,000 AF of stormwater in the Prado Dam
Conservation Pool. To some extent, the losses in baseflow are partially offset through the capture of
additional stormwater held in the Prado Dam Conservation Pool. When available, OCWD will continue to
augment groundwater recharge through the purchase of imported water through MET. OCWD will
diligently monitor and evaluate future water supply projects to sustainably manage and protect the OC
Basin for future generations.
6.3.4.2 OCWD Engineer's Report
The OCWD Engineer's Report reports on the groundwater conditions and investigates information related
to water supply and groundwater basin usage within OCWD's service area.
The overall BPP achieved in the 2019 to 2020 water year within OCWD for non-irrigation use was 75.9%.
The achieved pumping was less than the BPP established for the 2019 to 2020 water year primarily due
to the water quality impacts of PFAS. As indicated in Section 6.3.4, a BPP of 77% was established for
water year 2021-22. Analysis of the groundwater basin's projected accumulated overdraft, the available
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supplies to the OC Basin (assuming average hydrology) and the projected pumping demands indicate
that this level of pumping can be sustained for 2021-22 without detriment to the OC Basin (OCWD, 2021).
In FY 2021-22 additional production of approximately 22,000 AF above the BPP will be undertaken by
the City of Tustin, City of Garden Grove, City of Huntington Beach, Mesa Water District, and IRWD.
These agencies use the additional pumping allowance in order to accommodate groundwater quality
improvement projects. As in prior years, production above the BPP from these projects would be partially
or fully exempt from the BEA as a result of the benefit provided to the OC Basin by removing poor-quality
groundwater and treating it for beneficial use (OCWD, 2021).
6.3.5 Recharge Management
Recharging water into the OC Basin through natural and artificial means is essential to support pumping
from the OC Basin. Active recharge of groundwater began in 1949, in response to increasing drawdown
of the OC Basin and, consequently, the threat of seawater intrusion. The OC Basin's primary source of
recharge is flow from the Santa Ana River, which is diverted into recharge basins and its main Orange
County tributary, Santiago Creek. Other sources of recharge water include natural infiltration, recycled
water, and imported water. Natural recharge consists of subsurface inflow from local hills and mountains,
infiltration of precipitation and irrigation water, recharge in small flood control channels, and groundwater
underflow to and from Los Angeles County and the ocean.
Recycled water for the OC Basin recharge is from two sources. The main source of recycled water is from
the GWRS, which is injected into the Talbert Seawater Barrier and recharged in the Kraemer, Miller, and
Miraloma Basins (City of La Habra et al., 2017). The second source of recycled water is water purified at
the Water Replenishment District's Leo J. Vander Lans Treatment Facility, which supplies water to the
Alamitos Seawater Barrier (owned and operated by the Los Angeles County Department of Public
Works). OCWD's share of the Alamitos Barrier injection total for water year 2018-19 was less than half of
the total injection, based on barrier wells located within Orange County. The Water Replenishment District
of Southern California (WRD) also works closely with OCWD to ensure that the water demands at the
Alamitos Barrier are fulfilled through the use of recycled water as opposed to imported water, however the
recycled portion was less than 33% for the last six years due to operational issues and wastewater supply
interruptions (OCWD, 2020a). Injection of recycled water into these barriers is an effort by OCWD to
control seawater intrusion into the OC Basin. Operation of the injection wells forms a hydraulic barrier to
seawater intrusion.
OCWD purchases imported water for recharge from MWDOC. Untreated imported water can be used to
recharge the OC Basin through the surface water recharge system in multiple locations, such as Anaheim
Lake, Santa Ana River, Irvine Lake, and San Antonio Creek. Treated imported water can be used for
in-lieu recharge, as was performed extensively from 1977 to 2007 (City of La Habra et al., 2017).
For detailed recharge management efforts from OCWD, refer to OCWD's 2017 "Basin 8-1 Alternative"
(Appendix G).
6.3.6 MET Groundwater Replenishment Program
In the past, OCWD, MWDOC, and MET have coordinated water management to increase storage in the
OC Basin when imported supplies are available for this purpose. MET's groundwater replenishment
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program was discontinued on January 1, 2013, and currently MET via MWDOC sells replenishment water
to OCWD at the full service untreated MET rate.
MWDOC's imported water sales to OCWD since FY 1990-91 averages approximately 31,200 AF per
year. Recently, due to low Santa Ana River flows as a result of low precipitation and increased use along
the river, OCWD has needed to purchase more imported replenishment water per year than the average
of 31,200 AFY over the last 25 years (this does not include water amounts from MET's Conjunctive Use
Program (CUP) or its Cyclic Storage Account). However, with the emergence of PFAS affecting
groundwater production, the need to purchase imported water has been temporary suspended.
Until PFAS treatment is in place for most groundwater producers in the region, imported replenishment
water will be significantly reduced.
6.3.7 MET Conjunctive Use Program / Cyclic Storage Program with OCWD
Since 2004, OCWD, MWDOC, and certain groundwater producers have participated in MET's CUP.
This program allows for the storage of MET water in the OC Basin. The existing MET program provides
storage up to 66,000 AF of water in the OC Basin to be pumped by participating producers in place of
receiving imported supplies during water shortage events in exchange for MET's contribution to
improvements in basin management facilities and an annual administrative fee. These improvements
include eight new groundwater production wells, improvements to the seawater intrusion barrier, and
construction of the Diemer Bypass Pipeline. The water is accounted for via the CUP program
administered by the wholesale agencies and is controlled by MET such that it can be withdrawn over
a three-year time period (OCWD, 2020). As of 2021, the CUP has not been in use since 2014.
The CUP contract ends in 2028.
The Cyclic Storage account is an alternative storage account with MET. However, unlike the CUP
program, OCWD controls when the water is used. The Cyclic Water Storage Program allows MET to
store water in a local groundwater basin during surplus conditions, where MET has limited space in its
regional storage locations. Once the water is stored via direct delivery or In-lieu the groundwater agency
has the ability to purchase this water at a future date or over a 5-year period.
6.3.8 Overdraft Conditions
Annual groundwater basin overdraft, as defined in OCWD's Act, is the quantity by which production of
groundwater supplies exceeds natural replenishment of groundwater supplies during a water year.
This difference between extraction and replenishment can be estimated by determining the change in
volume of groundwater in storage that would have occurred had supplemental water not been used for
any groundwater recharge purpose, including seawater intrusion protection, advanced water reclamation,
and the in-Lieu Program.
The annual analysis of basin storage change and accumulated overdraft for water year 2019-20 has been
completed. Based on the three-layer methodology, an accumulated overdraft of 200,000 AF was
calculated for the water year ending June 30, 2020. The accumulated overdraft for the water year ending
June 30, 2019 was 236,000 AF, which was also calculated using the three-layer storage method.
Therefore, an annual increase of 36,000 AF in stored groundwater was calculated as the difference
between the June 2019 and June 2020 accumulated overdrafts (OCWD, 2021).
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6.3.9 Planned Future Sources
Although not a new source, the City plans to build a centralized treatment facility to treat PFAS, in which
up to four wells will be treated, to ensure reliable local groundwater and continued drinking water safety.
One well that is affected by PFAS will be abandoned. In partnership with OCWD, the City is also planning
to redrill the Beneta Well. These projects are further described in Section 6.9.
On a regional scale, OCWD regularly evaluates potential projects and conducts studies to review the
feasibility of new projects or sources. A few groundwater basin-related projects that are planned or in
progress are described below.
• GWRSFE—The Final Expansion of the GWRS is currently underway and is the third and final phase
of the project. When the Final Expansion is completed in early 2023, the plant's treatment capacity
will increase from 100 to 130 MGD. To produce 130 MGD, additional treated wastewater from Orange
County Sanitation District (OC San)'s Treatment Plant 2 is required. This recycled water represents a
high quality, drought-proof source of water to protect and enhance the OC Basin. The Final
Expansion project will include expanding the existing GWRS treatment facilities, constructing new
conveyance facilities at OC San Plant 2, and rehabilitating an existing pipeline between OC San Plant
2 and the GWRS. Once completed, the GWRS plant will recycle 100% of OC San's reclaimable
sources and produce enough water to meet the needs of over one million people.
• Forecast Informed Reservoir Operations (FIRO) at Prado Dam —Stormwater represents a
significant source of water used by OCWD to recharge the OC Basin. Much of this recharge is made
possible by the capture of Santa Ana River stormflows behind Prado Dam in the Conservation Pool.
FIRO represents the next generation of operating water reservoirs using the best available
technology. Advances in weather and stormwater runoff forecasting hold promise to allow USACE to
safety impound more stormwater while maintaining equivalent flood risk management capability
behind Prado Dam. Preliminary modeling show that by expanding the Conservation Pool from
elevation 505 to 512 ft msl, annual recharge to the groundwater basin could increase by as much as
4,500 to 7,000 AFY.
e.4 Surface Water
6.4.1 Existing Sources
There are, currently, no direct surface water uses in the City's service area.
6.4.2 Planned Future Sources
As of 2021, there are no planned direct uses of surface water in the City's service area.
6.5 Stormwate,
6.5.1 Existing Sources
There are, currently, no direct stormwater uses in the City's Service area.
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6.5.2 Planned Future Sources
As of 2021, there are no planned stormwater uses in the City's service area.
YVastewater and Recycled Water
The City is not directly involved in wastewater services as it does not own or operate the wastewater
collection system in its service area. The sewer collection system is owned and operated by EOCWD.
Additionally, the City does not own or operate wastewater treatment facilities. Recycled water is
wastewater that is treated through primary, secondary and tertiary processes and is acceptable for
most non-potable water purposes such as irrigation, and commercial and industrial process water per
Title 22 requirements. Recycled water opportunities have continued to grow in Southern California as
public acceptance and the need to expand local water resources continues to be a priority. Recycled
water also provides a degree of flexibility and added reliability during drought conditions when imported
water supplies are restricted. The City is indirectly involved in recycled water production, through its
supply of wastewater for IPR. The following sections expand on the existing agency collaboration
involved in these efforts as well as the City's projected recycled water use over the next 25 years.
6.6.1 Agency Coordination
The City does not own or operate wastewater treatment facilities and sends all collected wastewater to
OC San for treatment and disposal. OC San provides treated water to OCWD, the manager of the
Orange County Groundwater Basin. OCWD strives to maintain and increase the reliability of the Orange
County Groundwater Basin through replenishment with imported water, stormwater, and advanced
treated wastewater. A full description of the Orange County Groundwater Basin is available in Section
6.3.2. OCWD and OC San have jointly constructed and expanded two water recycling projects to meet
this goal including: 1) OCWD Green Acres Project (GAP), and 2) OCWD GWRS.
6.6.1 .1 OCWD Green Acres Project
OCWD owns and operates the GAP, a water recycling system that provides up to 8,400 AFY of recycled
water for irrigation and industrial uses. GAP provides an alternate source of water that is mainly delivered
to parks, golf courses, greenbelts, cemeteries, and nurseries in the cities of Costa Mesa, Fountain Valley,
Newport Beach, and Santa Ana. Approximately 100 sites use GAP water, current recycled water users
include Mile Square Park and Golf Courses in Fountain Valley, Costa Mesa Country Club, Chroma
Systems carpet dyeing, Kaiser Permanente, and Caltrans. The City does not receive any GAP water.
6.6.1 .2 OCWD Groundwater Replenishment System
OCWD's GWRS allows Southern California to decrease its dependency on imported water and creates a
local and reliable source of water. OCWD's GWRS purifies secondary treated wastewater from OC San to
levels that meet and exceed all state and federal drinking water standards. The GWRS Phase 1 plant has
been operational since January 2008 and uses a three-step advanced treatment process consisting of
microfiltration (MF), reverse osmosis (RO), and ultraviolet(UV) light with hydrogen peroxide (H2O2).
A portion of the treated water is injected into the seawater barrier to prevent seawater intrusion into the
groundwater basin. The other portion of the water is pumped to ponds where the water percolates into
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deep aquifers and becomes part of Orange County's water supply. The treatment process described on
OCWD's website is provided below (OCWD, GWRS, 2020).
The GWRS first began operating in 2008 producing 70 MGD and in 2015, it underwent a 30 MGD
expansion. Approximately 39,200 AFY of the highly purified water is pumped into the injection wells and
72,900 AFY is pumped to the percolation ponds in the City of Anaheim where the water is naturally
filtered through sand and gravel to deep aquifers of the groundwater basin. The Orange County
Groundwater Basin provides approximately 72% of the potable water supply for north and central Orange
County. The design and construction of the first phase (78,500 AFY) of the GWRS project was jointly
funded by OCWD and OC San; Phase 2 expansion (33,600 AFY) was funded solely by OCWD.
The Final Expansion of the GWRS is currently underway and is the third and final phase of the project.
When the Final Expansion is completed in 2023, the plant will produce 130 MGD. To produce 130 MGD,
additional treated wastewater from OC San is required. This additional water will come from OC San's
Treatment Plant 2, which is in the City of Huntington Beach approximately 3.5 miles south of the GWRS.
The Final Expansion project will include expanding the existing GWRS treatment facilities, constructing
new conveyance facilities at OC San Plant 2 and rehabilitating an existing pipeline between OC San
Plant 2 and the GWRS. Once completed, the GWRS plant will recycle 100% of OC San's reclaimable
sources and produce enough water to meet the needs of over one million people.
6.6.2 Wastewater Description and Disposal
The City does not provide wastewater services within its water service area as the sewer collection
system is owned and operated by EOCWD. The wastewater collected in the City's system is conveyed
to OC San's extensive system of gravity flow sewers, pump stations, and pressurized sewers.
Ultimately, the wastewater is treated at OC San treatment plants in Fountain Valley (Plant No. 1) and
Huntington Beach (Plant No. 2). Plant No. 1 has a total rated primary capacity of 108 MGD and a
secondary treatment capacity of 80 MGD. Plant No. 2 has a rated primary capacity of 168 MGD and
secondary treatment capacity of 90 MGD. Both plants share a common ocean outfall, but Plant No. 1
currently provides all its secondary treated wastewater to OCWD's GWRS for beneficial reuse.
The 120-inch diameter ocean outfall extends 4 miles off the coast of Huntington Beach. A 78-inch
diameter emergency outfall also extends 1.3 miles off the coast. Table 6-6 summarizes the wastewater
collected by the City and transported to OC San's system in 2020.
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Table 6-6: Retail: Wastewater Collected Within Service Area in 2020
DWR Submittal •le 6-2 Retail: Wastewater Collected Within Service Area in 2020
There is no wastewater collection system.The supplier will not complete the table
below.
Percentage of 1 1 service area covered by • •
Percentage of 1 1 service area population covered by • •
system
Wastewater •lle--:-- ipient of
Volume of Name of
Wastewater Wastewater Is WWTP
Name of Wastewater Is WWTP
Collected Treatment Treatment Located
Wastewater Volume from Agency Plant Within Operation
Collection Metered or Contracted to
Agency Estimated? UWMP Receiving Name UWMP a Third Party?
Service Collected Area?
Area 2020 Wastewater
Plant No.
EOCWD Estimated 6,791 OCSD 1/ Plant No No
No. 2
Total Wastewater Collected
from Service Area in 2020: 6,791
NOTES:
Assumed a return rate of 65% (City of Tustin, 2015)
6.6.3 Current Recycled Water Uses
There are currently no direct recycled water uses within the City's service area. For indirect use, the City
also benefits from OCWD's GWRS system that provides IPR through replenishment of Orange County
Groundwater Basin with water that meets state and federal drinking water standards.
6.6.4 Projected Recycled Water Uses
The City does not have any direct non-potable uses within their service area and does not currently have
the potential for non-potable reuse due to nonexistent or planned recycled water infrastructure. The City
will continue to supply wastewater to support the region's IPR via GWRS. Although the 2015 UWMP
acknowledged IPR of wastewater, it did not quantify projections. These projections will be prepared
moving forward. The projected 2020 recycled water use from the City's 2015 UWMP are compared to the
2020 actual use in Table 6-7.
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Table 6-7: Retail: 2020 UWMP Recycled Water Use Projection Compared to 2020 Actual
DWR Submittal •le 6-5 Retail: 2015 UWMP Recycled Water Use Projection • • . - •
to 2020 Actual
ecycled water was notused in 2015 • projected for use in
rhe
Use Type 2015 Projection for 2020 Actual Use
2020
Agricultural irrigation
Landscape irrigation (excludes golf courses)
Golf course irrigation
Commercial use
Industrial use
Geothermal and other energy production
Seawater intrusion barrier
Recreational impoundment
Wetlands or wildlife habitat
Groundwater recharge (IPR) N/A 3,356
Surface water augmentation (IPR)
Direct potable reuse
Other Type of Use
Total 0 3,356
NOTES:
Groundwater recharge (IPR) estimated based on OCWD Groundwater Basin Production and
Percent of Total Basin Production for FY2019-20 (33.3%)
6.6.5 Potential Recycled Water Uses
Potential recycled water users are locations where recycled water could replace potable water use.
While the City recognizes the potential for beneficial reuse in their service area, there is no source of
recycled water supply in proximity to the City. Recycled water analyses performed over the years have
shown that local treatment and reuse facilities are not feasible. The City supports, encourages, and
contributes to the continued development of recycled water and potential uses throughout the region with
OCWD's GWRS.
6.6.6 Optimization Plan
Studies of water recycling opportunities within Southern California provide a context for promoting the
development of water recycling plans. It is recognized that broad public acceptance of recycled water
requires continued education and public involvement. Currently, most of the recycled water available is
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being directed toward replenishment of the groundwater basin and improvements in groundwater quality.
As a user of groundwater, the City supports the efforts of OCWD and OC San to use recycled water as a
primary resource for groundwater recharge in Orange County.
Public Education
The City participates in the MWDOC public education and school education programs, which include
extensive sections on water recycling. MWDOC's water use efficiency public information programs are a
partnership with agencies throughout the county.
Through a variety of public information programs, MWDOC reaches the public, including those in the City,
with information regarding present and future water supplies, the demands for a suitable quantity and
quality of water, including recycled water, and the importance of implementing water efficiency techniques
and behaviors. Through MWDOC, water education programs have reached thousands of students in the
City with grade-specific programs that include information on recycled water.
Financial Incentives
In other areas of Orange County, recycled water is used for irrigating golf courses, parks, schools,
businesses, and communal landscaping, as well as for groundwater recharge. The implementation of
recycled water projects involves a substantial upfront capital investment for planning studies,
Environmental Impact Reports (EIRs), engineering design and construction before there recycled water is
available to the market. Analyses have indicated that present worth costs to incorporate recycled water
within the City are not cost effective as compared to purchasing imported water from MWDOC or using
groundwater.
The establishment of new supplemental funding sources through federal, state and regional programs
now provides significant financial incentives for water agencies to develop and make use of recycled
water locally. Potential sources of funding include federal, state and local funding opportunities.
These funding sources include the United States Department of Interior Bureau of Reclamation (USBR),
California Proposition 13 Water Bond, Proposition 84 and MET Local Resources Program (LRP).
These funding opportunities may be sought by the City or possibly more appropriately by regional
agencies. The City will continue to support seeking funding for regional water recycling projects and
programs.
Optimization Plan
The City does not use recycled water, therefore, there is no need for a recycled water optimization plan.
The City will continue to conduct feasibility studies for recycled water and seek out creative solutions such
as funding, regulatory requirements, institutional arrangement, and public acceptance for recycled water
use with MWDOC, OCWD, MET and other cooperative agencies.
6.7 Desalination Opportunities
In 2001, MET developed a Seawater Desalination Program (SDP) to provide incentives for developing
new seawater desalination projects in MET's service area. In 2014, MET modified the provisions of their
LRP to include incentives for locally produced seawater desalination projects that reduce the need for
imported supplies. To qualify for the incentive, proposed projects must replace an existing demand or
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prevent new demand on MET's imported water supplies. In return, MET offers three incentive formulas
under the program:
• Sliding scale incentive up to $340 per AF for a 25-year agreement term, depending on the unit
cost of seawater produced compared to the cost of MET supplies.
• Sliding scale incentive up to $475 per AF for a 15-year agreement term, depending on the unit
cost of seawater produced compared to the cost of MET supplies.
• Fixed incentive up to $305 per AF for a 25-year agreement term.
Developing local supplies within MET's service area is part of their IRP goal of improving water supply
reliability in the region. Creating new local supplies reduce pressure on imported supplies from the
SWP and Colorado River.
On May 6th, 2015, the SWRCB approved an amendment to the state's Water Quality Control Plan for the
Ocean Waters of California (California Ocean Plan) to address effects associated with the construction
and operation of seawater desalination facilities (Desalination Amendment). The amendment supports the
use of ocean water as a reliable supplement to traditional water supplies while protecting marine life and
water quality. The California Ocean Plan now formally acknowledges seawater desalination as a
beneficial use of the Pacific Ocean and the Desalination Amendment provides a uniform, consistent
process for permitting seawater desalination facilities statewide.
If the following projects are developed, MET's imported water deliveries to Orange County could be
reduced. These projects include the Huntington Beach Seawater Desalination Project and the Doheny
Desalination Project.
As for City-led initiatives, the City has not investigated seawater desalination as a result of economic and
physical impediments.
Brackish groundwater is groundwater with a salinity higher than freshwater, but lower than seawater.
Brackish groundwater typically requires treatment using desalters.
6.7.1 Ocean Water Desalination
Huntington Beach Seawater Desaiination Project— Poseidon Resources LLC (Poseidon), a private
company, is developing the Huntington Beach Seawater Desalination Project to be co-located at the
AES Power Plant in the City of Huntington Beach along Pacific Coast Highway and Newland Street.
The proposed project would produce up to 50 MGD (56,000 AFY) of drinking water to provide
approximately 10% of Orange County's water supply needs.
Over the past several years, Poseidon has been working with OCWD on the general terms and conditions
for selling the water to OCWD. OCWD and MWDOC have proposed a few distribution options to agencies
in Orange County. The northern option proposes the water be distributed to the northern agencies closer
to the plant within OCWD's service area with the possibility of recharging/injecting a portion of the product
water into the OC Basin. The southern option builds on the northern option by delivering a portion of the
product water through the existing OC-44 pipeline for conveyance to the South Orange County water
agencies. A third option is also being explored, which includes all of the product water to be recharged
into the OC Basin. Currently, a combination of these options could be pursued.
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The Huntington Beach Seawater Desalination project plant capacity of 56,000 AFY would be the single
largest source of new, local drinking water available to the region. In addition to offsetting imported
demand, water from this project could provide OCWD with management flexibility in the OC Basin by
augmenting supplies into the Talbert Seawater Barrier to prevent seawater intrusion.
In May 2015, OCWD and Poseidon entered into a non-binding Term Sheet that provided the overall
partner structure in order to advance the project. Based on the initial Term Sheet, which was updated in
2018, Poseidon would be responsible for permitting, financing, design, construction, and operations of the
treatment plant while OCWD would purchase the production volume, assuming the product water quality
and quantity meet specific contract parameters and criteria. Furthermore, OCWD would then distribute
the water in Orange County using one of the proposed distribution options described above.
Currently, the project is in the regulatory permit approval process with the Regional Water Quality Control
Board and the California Coastal Commission. Once all of the required permits are approved, Poseidon
will then work with OCWD and interested member agencies in developing a plan to distribute the water.
Subsequent to the regulatory permit approval process, and agreement with interested parties, Poseidon
estimates that the project could be online as early as 2017.
Under guidance provided by DWR, the Huntington Beach Seawater Desalination Plant's projected water
supplies are not included in the supply projections due to its current status within the criteria established
by State guidelines (DWR, 2020c).
Doheny Desalination Project—South Coast Water District (SCWD) is proposing to develop an ocean
water desalination facility in Dana Point. SCWD intends to construct a facility with an initial capacity of up
to 5 million gallons per day (MGD). The initial up to 5 MGD capacity would be available for SCWD and
potential partnering water agencies to provide a high quality, locally-controlled, drought-proof water
supply. The desalination facility would also provide emergency backup water supplies, should an
earthquake, system shutdown, or other event disrupt the delivery of imported water to the area. The
Project would consist of a subsurface slant well intake system (constructed within Doheny Beach State
Park), raw (sea)water conveyance to the desalination facility site (located on SCWD owned property), a
seawater reverse osmosis (SWRO) desalination facility, brine disposal through an existing wastewater
ocean outfall, solids handling facilities, storage, and potable water conveyance interties to adjacent local
and regional distribution infrastructure.
The Doheny Ocean Desalination Project has been determined as the best water supply option to meet
reliability needs of SCWD and south Orange County. SCWD is pursuing the Project to ensure it meets
the water use needs of its customers and the region by providing a drought-proof potable water supply,
which diversifies SCWD's supply portfolio and protects against long-term imported water emergency
outages and supply shortfalls that could have significant impact to our coastal communities, public health,
and local economy. Phase I of the Project (aka, the "Local" Project)will provide SCWD and the region
with up to 5 MGD of critical potable water supply that, together with recycled water, groundwater, and
conservation, will provide the majority of SCWD's water supply through local reliable sources. An up to
15 MGD capacity project has been identified as a potential future "regional" project that could be phased
incrementally, depending on regional needs.
On June 27, 2019, SCWD certified the final EIR and approved the Project. The Final EIR included
considerable additional information provided at the request of the Coastal Commission and the Regional
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Board, including an updated coastal hazard analysis, updated brine discharge modeling, and updated
groundwater modeling, updated hydrology analysis. The approval of the Project also included a
commitment to 100 percent carbon neutrality through a 100 percent offset of emissions through the
expansion of Project mitigation and use of renewable energy sources. SCWD is currently in the
permitting process and finalizing additional due diligence studies. If implemented, SCWD anticipates an
online date of 2025.
Under guidance provided by DWR, the Doheny Seawater Desalination Project's projected water supplies
are not included in the supply projections due to its current status within the criteria established by State
guidelines (DWR, 2020c).
6.7.2 Groundwater Desalination
The City is one of the producers of BEA-exempt groundwater. The projects consist of two groundwater
treatment facilities that are allowed above the BPP and the charges are BEA-exempt. The first facility is
the Main Street Treatment Plant, operating since 1989 to reduce nitrate levels from the groundwater
produced by Wells No. 3 and 4 by blending untreated groundwater with treatment plant product water
which undergoes reverse osmosis and ion exchange treatment processes. The second facility is the
Tustin Seventeenth Street Desalter, operating since 1996 to reduce high nitrate and total dissolved solids
concentration from groundwater produced by Wells No. 4 and the Newport well using reverse osmosis
(OCWD, 2015).
Water Exchanges and Transfers
Interconnections with other agencies result in the ability to share water supplies during short term
emergency situations or planned shutdowns of major imported water systems. However, beyond short
term outages, transfers can also be involved with longer term water exchanges to deal with droughts or
water allocation situations. The following subsections describe the City's existing and planned exchanges
and transfers.
6.8.1 Existing Exchanges and Transfers
The City maintains four emergency interconnections with GSWC, the City of Santa Ana, and IRWD.
All four connections are six inches in diameter, need to be manually activated, and supply flow in both
directions.
6.8.2 Planned and Potential Exchanges and Transfers
The City does not currently have plans to introduce new exchanges and transfers.
However, MWDOC continues to help its retail agencies develop transfer and exchange opportunities
that promote reliability within their systems. Therefore, MWDOC will look to help its retail agencies
navigate the operational and administrative issues of transfers within the MET distribution system.
On a regional scale, the Santa Ana River Conservation and Conjunctive Use Project (SARCCUP) is a
joint project established by five regional water agencies within the Santa Ana River Watershed
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(Eastern Municipal Water District, Inland Empire Utilities Agency, Western Municipal Water District,
OCWD, and San Bernardino Valley Municipal Water District).
In 2016, SARCCUP was successful in receiving $55 million in grant funds from Proposition 84 through
DWR. The overall SARCCUP program awarded by Proposition 84, consists of three main program
elements:
• Watershed-Scale Cooperative Water Banking Program
• Water Use Efficiency: Landscape Design and Irrigation Improvements and Water Budget
Assistance for Agencies
• Habitat Creation and Arundo Donax Removal from the Santa Ana River
The Watershed-Scale Cooperative Water Banking Program is the largest component of SARCCUP and
since 2016, Valley, MET, and the four SARCCUP-MWD Member Agencies, with MWDOC representing
OCWD, have been discussing terms and conditions for the ability to purchase surplus water from Valley
to be stored in the Santa Ana River watershed. With the Valley and MET surplus water purchase
agreement due for renewal, it was the desire of Valley to establish a new agreement with MET that allows
a portion of its surplus water to be stored within the Santa Ana River watershed.
An agreement between MET and four SARCCUP-MWD Member Agencies was approved earlier this year
that gives the SARCCUP agencies the ability to purchase a portion (up to 50%) of the surplus water that
San Bernardino Valley Municipal Water District (Valley), a SWP Contractor, sells to MET. Such water will
be stored in local groundwater basins throughout the Santa Ana River watershed and extract during dry
years to reduce the impacts from multiyear droughts. In Orange County, 36,000 AF can be stored in the
OC Basin for use during dry years. More importantly, this stored SARCCUP water can be categorized as
"extraordinary supplies", if used during a MET allocation, and can enhance a participating agencies'
reliability during a drought. Moreover, if excess water is available MWDOC can purchase additional water
for its service area.
Further details remain to be developed between OCWD, retail agencies, and MWDOC in how the water
will be distributed in Orange County and who participates.
6.9 Summary of Future Water Proiects
The City continually reviews practices that will provide its customers with adequate and reliable supplies.
Trained staff continue to ensure the water quality is safe and the water supply will meet present and
future needs in an environmentally and economically responsible manner.
Although the City has various projects planned to maintain and improve the water system, there are
currently no City-specific planned projects that have both a concrete timeline and a quantifiable increase
in supply.
6.9.1 City Initiatives
The City anticipates water demand in the City to decrease slightly over the next 25 years. Any new water
supply sources will be developed primarily to better manage the Basin and to replace or upgrade
inefficient wells, rather than to support population growth and new development.
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The projects that have been identified by the City to improve the City's water supply reliability and
enhance the operations of the City include the following design and construction projects:
Simon Ranch Reservoir and Booster Pump Station Replacement—The City plans to demolish and
construct a new reservoir and booster pump station to increase supply reliability in the distribution
system. This project is currently under construction and completion is expected by the end of 2021.
Beneta Well Site—The City plans to redrill at the Beneta Well site in partnership with OCWD
(SARCCUP) for an extraction well to pump from the OC Basin when needed. The City is currently in the
design phase for this project. The new well is expected to produce about 1,900 AFY and it is expected to
be completed by September 2023.
Centralized Treatment Facility—The City has a preliminary plan to rehabilitate one of the City's
treatment facilities and build a centralized treatment facility to treat PFAS, in which up to four wells will be
treated. This project is currently in the design phase.
6.9.2 Regional Initiatives
Beyond City-specific projects, the City consistently coordinates its long-term water shortage planning
with MWDOC and OCWD. MWDOC has identified the following future regional projects, some of
which can indirectly benefit the City to further increase local supplies and offset imported supplies
(CDM Smith, 2019):
Poseidon Huntington Beach Ocean Desalination Project— Poseidon proposes to construct
and operate the Huntington Beach Ocean Desalination Plant on a 12-acre parcel adjacent to the
AES Huntington Beach Generating Station. The facility would have a capacity of 50 MGD and
56,000 AFY, with its main components consisting of a water intake system, a desalination facility, a
concentrate disposal system, and a product water storage tank. This project would provide both system
and supply reliability benefits to the South Orange County (SOC), the OC Basin, and Huntington Beach.
The capital cost in the initial year for the plant is $1.22 billion.
Doheny Ocean Desalination Project—SCWD is proposing to construct an ocean water desalination
facility in Dana Point at Doheny State Beach. The facility would have an initial up to 5 MGD capacity, with
the potential for future expansions up to 15 MGD. The project's main components are a subsurface water
intake system, a raw ocean water conveyance pipeline, a desalination facility, a seawater reverse
osmosis (SWRO) desalination facility, a brine disposal system, and a product water storage tank.
San Juan Watershed Project—Santa Margarita Water District (SMWD) and other project partners have
proposed a multi-phased project within the San Juan Creek Watershed to capture local stormwater and
develop, convey, and recharge recycled water into the San Juan Groundwater Basin and treat the water
upon pumping it out of the basin. The first phase includes the installation of three rubber dams within
San Juan Creek to promote in-stream recharge of the basin, with an anticipated production of 700 AFY
on average. The second phase would develop additional surface water and groundwater management
practices by using stormwater and introducing recycled water for infiltration into the basin and has an
anticipated production of 2,660 to 4,920 AFY. The third phase will introduce recycled water directly into
San Juan Creek through live stream recharge, with an anticipated production of up to 2,660 AFY (SMWD,
2021).
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Cadiz Water Bank—SMWD and Cadiz, Inc. are developing this project to create a new water supply by
conserving groundwater that is currently being lost to evaporation and recovering the conserved water by
pumping it out of the Fenner Valley Groundwater Basin to convey to MET's CRA. The project consists of
a groundwater pumping component that includes an average of 50 TAFY of groundwater that can be
pumped from the basin over a 50-year period, and a water storage component that allows participants to
send surplus water supplies to be recharged in spreading basins and held in storage.
South Orange County Emergency Interconnection Expansion— MWDOC has been working with the
SOC agencies on improvements for system reliability primarily due to the risk of earthquakes causing
outages of the MET imported water system as well as extended grid outages. Existing regional
interconnection agreements between IRWD and SOC agencies provides for the delivery of water through
the IRWWD system to participating SOC agencies in times of emergency. MWDOC and IRWD are
currently studying an expansion of the program, including the potential East Orange County Feeder No. 2
pipeline and an expanded and scalable emergency groundwater program, with a capital cost of$867,451.
SARCCUP—SARCCUP is a joint project established between MET, MWDOC, Eastern MWD, Western
MWD, Inland Empire Utilities Agency, and OCWD that can provide significant benefits in the form of
additional supplies during dry years for Orange County. Surplus SWP water from San Bernardino Valley
Water District (SBVMWD) can be purchased and stored for use during dry years. This water can even be
considered an extraordinary supply under MET allocation Plan, if qualified under MET's extraordinary
supply guidelines. OCWD has the ability to store 36,000 AF of SARCCUP water and if excess water is
available MWDOC has the ability to purchase additional water. Further details remain to be developed
between OCWD, retail agencies, and MWDOC in how the water will be distributed in Orange County and
who participates.
Moulton Niguel Water District(MNWD) /OCWD Pilot Storage Program - OCWD entered into an
agreement with MNWD to develop a pilot program to explore the opportunity to store water in the OC
Basin. The purpose of such a storage account would provide MNWD water during emergencies and/or
provide additional water during dry periods. As part of the agreement, OCWD hired consultants to
evaluate where and how to extract groundwater from the OC Basin with several options to pump the
water to MNWD via the East Orange County Feeder No. 2; as well as a review of existing
banking/exchange programs in California to determine what compensation methodologies could OCWD
assess for a storage/banking program.
a.-i U r—nergy inxensii.�
A new requirement for this 2020 UWMP is an energy intensity analysis of the Supplier's water,
wastewater, and recycled water systems, where applicable for a 12-month period. The City owns and
operates a water distribution system but wastewater collection in the City is handled by the EOCWD and
Irvine Ranch Water District. This section reports the energy intensity for the water system using data from
CY2019.
Water and energy resources are inextricably connected. Known as the "water-energy nexus", the
California Energy Commission estimates the transport and treatment of water, treatment and disposal of
wastewater, and the energy used to heat and consume water account for nearly 20% of the total
electricity and 30% of non-power plant related natural gas consumed in California. In 2015, California
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issued new rules requiring 50% of its power to come from renewables, along with a reduction in
greenhouse gas (GHG)emissions to 40% below 1990 levels by 2030. Consistent with energy and water
conservation, renewable energy production, and GHG mitigation initiatives, the City reports the energy
intensity of its water and wastewater operations.
The methodology for calculating water energy intensity outlined in Appendix O of the UWMP Guidebook
was adapted from the California Institute for Energy Efficiency exploratory research study titled
"Methodology for Analysis of the Energy Intensity of California's Water Systems" (Wilkinson 2000).
The study defines water energy intensity as the total amount of energy, calculated on a whole-system
basis, required for the use of a given amount of water in a specific location.
UWMP reporting is limited to available energy intensity information associated with water processes
occurring within an urban water supplier's direct operational control. Operational control is defined as
authority over normal business operations at the operational level. Any energy embedded in water
supplies imparted by an upstream water supplier(e.g., water wholesaler)or consequently by a
downstream water purveyor(e.g., retail water provider) is not included in the UWMP energy intensity
tables. The City's calculations conform to methodologies outlined in the UWMP Guidebook and
Wilkinson study.
6.10.1 Water Supply Energy Intensity
In CY2019, the City consumed 1023.4 killowatt-hours (kWh) per AF for water extraction, treatment, and
distribution (Table 6-8). The basis for calculations is provided in more detail in the following subsections.
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Table 6-8:Recommended Energy Intensity—Multiple Water Delivery Products
Urban Water Supplier. city of Tustin
Water Delivery Product(if delivering more than one type of product use Table 0-1C)
Retail Potable Deliveries
Ta ble,O-IA:Recom merded Energy Reporting-Water Supply Process Approach
Enter Start Date for 1/1/2019
Reporting Period Urban Water Supplier Operational Control
End Date 12/31/2019
Water Management Process Non-Consequential Hydropower of applicable]
❑ Is upstream embedded in the values reported?
Water Extractand Placeinto' Total
Volume Units Divert Storage Conveyance Treatment Distribution utility Hydropower Net Utility
Used
volume of water Entering Process AF 92982 a a 21104 9347.8 93478 a 93478
Energy Consumed(11VII 11A 6665036 ' a a -1745464 155277 9566279 9556279
Energy intensity(kWh/vol,J N/A 7115.7 0.0 0.0 1265.2 106 1023.4 0.0 7023.4
Quantity Df Self-Generated Renewable Energy
OkWh
Data Quality(Estimate,Metered Data,Combination of Estimates and Metered Data)
Combination of Estimates and Metered Data
Data Quality Narrative:
Volume of Water Entering Process:Extraction data based MWDOC Compiled Water Audits"Volume From Own Sources"and Distribution data based on MWDOC Compiled Water Audits
"Authorized Consumption."Non-Revenue Water is not considered in this calculation—the energy efficiency is based on water delivered to customers.
Energy Consumed:Erased on metered data.Several of the wells have associated booster pumps on the same meter which increases the energy consumed in the'Extract and Divert'process.
Two wells have treatment on site-for both of these,a single meter covers the well,treatment,and boosters.The energy for these meters was all included in the'Treatment'process in this
table.
Narrative:
The City of Tustin relies on imported water,local groundwater,and recycled water to meet their customers'water needs.Operational control is limited to groundwater wells and potable water
booster stations.This table does not include upstream embedded energy consumed prior to the City taking control.Distribution is based on the authorized consumpticn for 2019.
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6.10.1 .1 Operational Control and Reporting Period
As described throughout the report, the City is a retail agency that relies on groundwater and imported
water.
Water supply energy intensity was calculated for the 2019 calendar year. This is a standard for energy
and GHG reporting to the Climate Registry, California Air Resources Board and the United States
Environmental Protection Agency. Calendar year reporting provides consistency when assessing direct
and indirect energy consumption within a larger geographical context, as fiscal year starting dates can
vary between utilities and organizations.
6.10.1 .2 Volume of Water Entering Processes
According to MWDOC's Compiled Water Audits, the City extracted 9,299.2 AF of groundwater from the
OC Basin and distributed 9,347.8 AF of both groundwater and imported water. According to City-owned
meters, 2,170.4 AF of water was treated at the two wells that contain treatment.
6.10.1 .3 Energy Consumption and Generation
According to Southern California Edison (SCE) electricity bills, groundwater wells consumed
6,665,038 kWh of electricity, treatment facilities consumed 2,745,964 kWh of electricity, and pump
stations along the distribution system consumed 155,277 kWh of electricity. Several of the wells have
associated booster pumps on the same meter which increases the energy consumed for the groundwater
extraction process. Two wells have treatment on site - for both of these, a single meter covers the well,
treatment, and boosters. Because submetering is not available, all of the energy used by these meters
was attributed to the treatment process. Currently, the City does not generate renewable energy.
Energy consumption is based on metered data.
6.10.2 Key Findings and Next Steps
Calculating and disclosing direct operationally-controlled energy intensities is another step towards
understanding the water-energy nexus. However, much work is still needed to better understand
upstream and downstream (indirect)water-energy impacts. When assessing water supply energy
intensities or comparing intensities between providers, it is important to consider reporting boundaries as
they do not convey the upstream embedded energy or impacts energy intensity has on downstream
users. Engaging one's upstream and downstream supply chain can guide more informed decisions that
holistically benefit the environment and are mutually beneficial to engaged parties. Suggestions for further
study include:
• Supply-chain engagement—The City relies on a variety of water sources for their customers.
While some studies have used life cycle assessment tools to estimate energy intensities, there is
a need to confirm this data. The 2020 UWMP requirement for all agencies to calculate energy
intensity will help the City and neighboring agencies make more informed decisions that would
benefit the region as a whole regarding the energy and water nexus. A similar analysis could be
performed with upstream supply chain energy, for example, with State Project Water.
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• Internal benchmarking and goal setting —With a focus on energy conservation and a projected
increase in water demand despite energy conservation efforts, the City's energy intensities will
likely decrease with time. Conceivably, in a case where water demand decreases, energy
intensities may rise as the energy required to pump or treat is not always proportional to water
delivered. In the course of exploring the water-energy nexus and pursuing renewable energy
goals, there is a need to assess whether energy intensity is a meaningful indicator or if it makes
sense to use a different indicator to reflect the City's commitment to energy and water
conservation.
• Regional sustainability—Water and energy efficiency are two components of a sustainable future.
Efforts to conserve water and energy, however, may impact the social, environmental, and
economic livelihood of the region. In addition to the relationship between water and energy, over
time, it may also be important to consider and assess the connection these resources have on
other aspects of a sustainable future.
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7 WATER SERVICE RELIABILITY AND DROUGHT RISK
ASSESSMENT
Building upon the water supply identified and projected in Section 6, this key section of the
UWMP examines the City's water supplies, water uses, and the resulting water supply reliability.
Water service reliability reflects the City's ability to meet the water needs of its customers under varying
conditions. For the UWMP, water supply reliability is evaluated in two assessments: 1) the Water Service
Reliability Assessment and 2)the DRA. The Water Service reliability assessment compares projected
supply to projected demand in 2025 through 2045 for three hydrological conditions: a normal year, a
single dry year, and a drought period lasting five consecutive years. The DRA, a new UWMP requirement,
assesses near-term water supply reliability. It compares projected water supply and demand assuming
the City experiences a drought period for the next five consecutive years. Factors affecting reliability,
such as climate change and regulatory impacts, are accounted for in the assessment.
7.1 Water Service Reliability Overview
Every urban water supplier is required to assess the reliability of their water service to its customers under
normal, single-dry, and multiple-dry water years. The City depends on a combination of imported and
local supplies to meet its water demands and has taken numerous steps to ensure it has adequate
supplies. Development of local supplies augments the reliability of the water system. There are various
factors that may impact reliability of supplies such as legal, environmental, water quality and climatic
which are discussed below. MET's and MWDOC's 2020 UWMPs conclude that they can meet full-service
demands of its member agencies starting 2025 through 2045 during normal years, a single-dry year, and
multiple-dry years. Consequently, the City is projected to meet full-service demands through 2045 for the
same scenarios.
MET's 2020 IRP update describes the core water resources that will be used to meet full-service
demands at the retail level under all foreseeable hydrologic conditions from 2025 through 2045.
The foundation of MET's resource strategy for achieving regional water supply reliability has been to
develop and implement water resources programs and activities through its IRP preferred resource mix.
This preferred resource mix includes conservation, local resources such as water recycling and
groundwater recovery, Colorado River supplies and transfers, SWP supplies and transfers, in-region
surface reservoir storage, in-region groundwater storage, out-of-region banking, treatment, conveyance,
and infrastructure improvements.
Table 7-1 shows the basis of water year data used to predict drought supply availability. The average
(normal) hydrologic condition for the MWDOC service area, which the City is a part of, is represented
by FY 2017-18 and FY 2018-19 and the single-dry year hydrologic condition by FY 2013-14.
The five consecutive years of FY 2011-12 to FY 2015-16 represent the driest five-consecutive year
historic sequence for MWDOC's service area. Locally, Orange County rainfall for the five-year period
totaled 36 inches, the driest on record.
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Table 7-1 Retail: Basis of Water Year Data(Reliability Assessment)
Quantification of available supplies is not
El compatible with this table and is provided
elsewhere in the UWMP.
Year Type Base Year Location
Quantification of available supplies is
❑.� provided in this table as either volume only,
percent only, or both.
Volume
Available %of Average Supply
Average Year 2018-2019 - 100%
Single-Dry Year 2014 - 106%
Consecutive Dry Years 1st Year 2012 - 106%
Consecutive Dry Years 2nd Year 2013 - 106%
Consecutive Dry Years 3rd Year 2014 - 106%
Consecutive Dry Years 4th Year 2015 - 106%
Consecutive Dry Years 5th Year 2016 - 106%
NOTES:
Assumes an increase of 6%above average year demands in dry and multiple dry years based on the Demand
Forecast TM (CDM Smith, 2021). 106% represents the percent of average supply needed to meet demands of
a single-dry and multiple-dry years. Since the City is able to meet all of its demand with imported water from
MWDOC/ MET(on top of local groundwater), the percent of average supply value reported is equivalent to
the percent of average demand under the corresponding hydrologic condition.
The following sections provide a detailed discussion of the City's water source reliability. Additionally, the
following sections compare the City's projected supply and demand under various hydrological
conditions, to determine the City's supply reliability for the 25-year planning horizon.
7.2 Factors Affecting Reliability
In order to prepare realistic water supply reliability assessments, various factors affecting reliability were
considered. These include climate change and environmental requirements, regulatory changes, water
quality impacts, and locally applicable criteria.
7.2.1 Climate Change and the Environment
Changing climate patterns are expected to shift precipitation patterns and affect water supply availability.
Unpredictable weather patterns will make water supply planning more challenging. Although climate
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change impacts are associated with exact timing, magnitude, and regional impacts of these temperature
and precipitation changes, researchers have identified several areas of concern for California water
planners (MET, 2021). These areas include:
• A reduction in Sierra Nevada Mountain snowpack.
• Increased intensity and frequency of extreme weather events.
• Prolonged drought periods.
• Water quality issues associated with increase in wildfires.
• Changes in runoff pattern and amount.
• Rising sea levels resulting in:
o Impacts to coastal groundwater basins due to seawater intrusion.
o Increased risk of damage from storms, high-tide events, and the erosion of levees.
o Potential pumping cutbacks to the SWP and CVP.
Other important issues of concern due to global climate change include:
• Effects on local supplies such as groundwater.
• Changes in urban and agricultural demand levels and patterns.
• Increased evapotranspiration from higher temperatures.
• Impacts to human health from water-borne pathogens and water quality degradation.
• Declines in ecosystem health and function.
• Alterations to power generation and pumping regime.
• Increases in ocean algal blooms affected seawater desalination supplies.
The major impact in California is that without additional surface storage, the earlier and heavier runoff
(rather than snowpack retaining water in storage in the mountains), will result in more water being lost to
the oceans. A heavy emphasis on storage is needed in California.
In addition, the Colorado River Basin supplies have been inconsistent since about the year 2000, with
precipitation near normal while runoff has been less than average in two out of every three years.
Climate models are predicting a continuation of this pattern whereby hotter and drier weather conditions
will result in continuing lower runoff, pushing the system toward a drying trend that is often characterized
as long term drought.
Dramatic swings in annual hydrologic conditions have impacted water supplies available from the
SWP over the last decade. The declining ecosystem in the Delta has also led to a reduction in water
supply deliveries, and operational constraints, which will likely continue until a long-term solution to these
problems is identified and implemented (MET, 2021).
Legal, environmental, and water quality issues may have impacts on MET supplies. It is felt, however,
that climatic factors would have more of an impact than legal, water quality, and environmental factors.
Climatic conditions have been projected based on historical patterns, but severe pattern changes are still
a possibility in the future (MET, 2021).
7.2.2 Regulatory and Legal
Ongoing regulatory restrictions, such as those imposed by the Biops on the effects of SWP and the
federal CVP operations on certain marine life, also contributes to the challenge of determining water
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delivery reliability. Endangered species protection and conveyance needs in the Delta have resulted in
operational constraints that are particularly important because pumping restrictions impact many water
resources programs —SWP supplies and additional voluntary transfers, Central Valley storage and
transfers, and in-region groundwater and surface water storage. Biops protect special-status species
listed as threatened or endangered under the ESAs and imposed substantial constraints on Delta water
supply operations through requirements for Delta inflow and outflow and export pumping restrictions.
In addition, the SWRCB has set water quality objectives that must be met by the SWP including minimum
Delta outflows, limits on SWP and CVP Delta exports, and maximum allowable salinity level. SWRCB
plans to fully implement the new Lower San Joaquin River (LSJR) flow objectives from the Phase 1 Delta
Plan amendments through adjudicatory (water rights) and regulatory (water quality) processes by 2022.
These LSJR flow objectives are estimated to reduce water available for human consumptive use.
New litigation, listings of additional species under the ESAs, or regulatory requirements imposed by the
SWRCB could further adversely affect SWP operations in the future by requiring additional export
reductions, releases of additional water from storage, or other operational changes impacting water
supply operations.
The difficulty and implications of environmental review, documentation, and permitting pose challenges
for multi-year transfer agreements, recycled water projects, and seawater desalination plants.
The timeline and roadmap for getting a permit for recycled water projects are challenging and
inconsistently implemented in different regions of the state. Indirect potable reuse projects face regulatory
restraints such as treatment, blend water, retention time, and Basin Plan Objectives, which may limit how
much recycled water can feasibly be recharged into the groundwater basins. New regulations and
permitting uncertainty are also barriers to seawater desalination supplies, including updated Ocean Plan
Regulations, Marine Life Protected Areas, and Once-Through Cooling Regulations (MET, 2021).
7.2.3 Water Quality
The following sub-sections include narratives on water quality issues experienced in various water
supplies, if any, and the measures being taken to improve the water quality of these sources.
7.2.3.1 Imported Water
MET is responsible for providing high quality potable water throughout its service area.
Over 300,000 water quality tests are performed per year on MET's water to test for regulated
contaminants and additional contaminants of concern to ensure the safety of its waters. MET's supplies
originate primarily from the CRA and from the SWP. A blend of these two sources, proportional to each
year's availability of the source, is then delivered throughout MET's service area.
MET's primary water sources face individual water quality issues of concern. The CRA water source
contains higher TDS and the SWP contains higher levels of organic matter, lending to the formation of
disinfection byproducts. To remediate the CRA's high level of salinity and the SWP's high level of organic
matter, MET blends CRA and SWP supplies and has upgraded all of its treatment facilities to include
ozone treatment processes. In addition, MET has been engaged in efforts to protect its Colorado River
supplies from threats of uranium, perchlorate, and chromium VI while also investigating the potential
water quality impact of the following emerging contaminants: N-nitrosodimethylamine (NDMA),
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pharmaceuticals and personal care products (PPCP), microplastics, PFAS, and 1,4-dioxane (MET, 2021).
While unforeseeable water quality issues could alter reliability, MET's current strategies ensure the
delivery of high-quality water.
The presence of quagga mussels in water sources is a water quality concern. Quagga mussels are an
invasive species that was first discovered in 2007 at Lake Mead, on the Colorado River. This species of
mussels forms massive colonies in short periods of time, disrupting ecosystems and blocking water
intakes. They can cause significant disruption and damage to water distribution systems. MET has had
success in controlling the spread and impacts of the quagga mussels within the CRA, however the future
could require more extensive maintenance and reduced operational flexibility than current operations
allow. It also resulted in MET eliminating deliveries of CRA water into DVL to keep the reservoir free from
quagga mussels (MET, 2021).
7.2.3.2 Groundwater
OCWD is responsible for managing the OC Basin. To maintain groundwater quality, OCWD conducts an
extensive monitoring program that serves to manage the OC Basin's groundwater production, control
groundwater contamination, and comply with all required laws and regulations. A network of nearly
700 wells provides OCWD a source for samples, which are tested for a variety of purposes.
OCWD collects samples each month to monitor Basin water quality. The total number of water samples
analyzed varies year-to-year due to regulatory requirements, conditions in the basin and applied research
and/or special study demands. These samples are collected and tested according to approved federal
and state procedures as well as industry-recognized quality assurance and control protocols (City of
La Habra et al., 2017).
PFAS are of particular concern for groundwater quality, and since the summer of 2019, DDW requires
testing for PFAS compounds in some groundwater production wells in the OCWD area. In February 2020,
the DDW lowered its Response Levels (RL) for PFOA and PFOS to 10 and 40 parts per trillion (ppt)
respectively. The DDW recommends Producers not serve any water exceeding the RL—effectively
making the RL an interim Maximum Contaminant Level (MCL)while DDW undertakes administrative
action to set an MCL. In response to DDW's issuance of the revised RL, as of December 2020,
approximately 45 wells in the OCWD service area have been temporarily turned off until treatment
systems can be constructed. As additional wells are tested, OCWD expects this figure may increase to at
least 70 to 80 wells. The state has begun the process of establishing MCLS for PFOA and PFOS and
anticipates these MCLS to be in effect by the Fall of 2023. OCWD anticipates the MCLS will be set at or
below the RLs.
In April 2020, OCWD as the groundwater basin manager, executed an agreement with the impacted
Producers to fund and construct the necessary treatment systems for production wells impacted by
PFAS compounds. The PFAS treatment projects includes the design, permitting, construction, and
operation of PFAS removal systems for impacted Producer production wells. Each well treatment system
will be evaluated for use with either granular activated carbon (GAC) or ion exchange (IX) for the removal
of PFAS compounds. These treatment systems utilize vessels in a lead-lag configuration to remove
PFOA and PFOS to less than 2 ppt(the current non-detect limit). Use of these PFAS treatment systems
are designed to ensure the groundwater supplied by Producer wells can be served in compliance with
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current and future PFAS regulations. With financial assistance from OCWD, the Producers will operate
and maintain the new treatment systems once they are constructed.
To minimize expenses and provide maximum protection to the public water supply, OCWD initiated
design, permitting, and construction of the PFAS treatment projects on a schedule that allows rapid
deployment of treatment systems. Construction contracts were awarded for treatment systems for
production wells in the City of Fullerton and Serrano Water District in Year 2020. Additional construction
contracts will likely be awarded in the first and second quarters of 2021. OCWD expects the treatment
systems to be constructed for most of the initial 45 wells above the RL within the next 2 to 3 years.
As additional data are collected and new wells experience PFAS detections at or near the current RL,
and/or above a future MCL, and are turned off, OCWD will continue to partner with the affected Producers
and take action to design and construct necessary treatment systems to bring the impacted wells back
online as quickly as possible.
Groundwater production in FY 2019-20 was expected to be approximately 325,000 AF but declined to
286,550 AF primarily due to PFAS impacted wells being turned off around February 2020. OCWD
expects groundwater production to be in the area of 245,000 AF in FY 2020-21 due to the currently idled
wells and additional wells being impacted by PFAS and turned off. As PFAS treatment systems are
constructed, OCWD expects total annual groundwater production to slowly increase back to normal levels
(310,000 to 330,000 AF) (OCWD, 2020).
Salinity is a significant water quality problem in many parts of Southern California, including Orange
County. Salinity is a measure of the dissolved minerals in water including both TDS and nitrates.
OCWD continuously monitors the levels of TDS in wells throughout the OC Basin. TDS currently has
a California Secondary MCL of 500 mg/L. The portions of the OC Basin with the highest levels are
generally located in the cities of Irvine, Tustin, Yorba Linda, Anaheim, and Fullerton. There is also a
broad area in the central portion of the OC Basin where TDS ranges from 500 to 700 mg/L. Sources of
TDS include the water supplies used to recharge the OC Basin and from onsite wastewater treatment
systems, also known as septic systems. The TDS concentration in the OC Basin is expected to decrease
over time as the TDS concentration of GWRS water used to recharge the OC Basin is approximately
50 mg/L (City of La Habra et al., 2017).
Nitrates are one of the most common and widespread contaminants in groundwater supplies, originating
from fertilizer use, animal feedlots, wastewater disposal systems, and other sources. The MCL for nitrate
in drinking water is set at 10 mg/L. OCWD regularly monitors nitrate levels in groundwater and works with
producers to treat wells that have exceeded safe levels of nitrate concentrations. OCWD manages the
nitrate concentration of water recharged by its facilities to reduce nitrate concentrations in groundwater.
This includes the operation of the Prado Wetlands, which was designed to remove nitrogen and other
pollutants from the Santa Ana River before the water is diverted to be percolated into OCWD's surface
water recharge system.
Although water from the Deep Aquifer System is of very high quality, it is amber-colored and contains a
sulfuric odor due to buried natural organic material. These negative aesthetic qualities require treatment
before use as a source of drinking water. The total volume of the amber-colored groundwater is estimated
to be approximately 1 MAF.
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There are other potential contaminants that are of concern to and are monitored by OCWD.
These include:
• Methyl Tertiary Butyl Ether(MTBE)— MTBE is an additive to gasoline that increases octane
ratings but became a widespread contaminant in groundwater supplies. The greatest source of
MTBE contamination comes from underground fuel tank releases. The primary MCL for MTBE in
drinking water is 13 pg/L.
• Volatile Organic Compounds (VOC)—VOCs come from a variety of sources including industrial
degreasers, paint thinners, and dry-cleaning solvents. Locations of VOC contamination within the
OC Basin include the former EI Toro marine Corps Air Station, the Shallow Aquifer System, and
portions of the Principal Aquifer System in the Cities of Fullerton and Anaheim.
• NDMA— NDMA is a compound that can occur in wastewater that contains its precursors and is
disinfected via chlorination and/or chloramination. It is also found in food products such as cured
meat, fish, beer, milk, and tobacco smoke. The California Notification Level for NDMA is 10 ng/L
and the Response Level is 300 ng/L. In the past, NDMA has been found in groundwater near the
Talbert Barrier, which was traced to industrial wastewater dischargers.
• 1,4-Dioxane— 1,4-Dioxane is a suspected human carcinogen. It is used as a solvent in various
industrial processes such as the manufacture of adhesive products and membranes.
• Constituents of Emerging Concern (CEC)—CECs are either synthetic or naturally occurring
substances that are not currently regulated in water supplies or wastewater discharged but can
be detected using very sensitive analytical techniques. The newest group of CECs include
pharmaceuticals, personal care products, and endocrine disruptors. OCWD's laboratory is one of
a few in the state of California that continuously develops capabilities to analyze for new
compounds (City of La Habra et al., 2017).
7.2.4 Locally Applicable Criteria
Within Orange County, there are no significant local applicable criteria that directly affect reliability.
Through the years, the water agencies in Orange County have made tremendous efforts to integrate their
systems to provide flexibility to interchange with different sources of supplies. There are emergency
agreements in place to ensure all parts of the County have an adequate supply of water. In the northern
part of the County, agencies are able to meet a majority of their demands through groundwater with very
little limitation, except for the OCWD BPP. For the agencies in southern Orange County, most of their
demands are met with imported water where their limitation is based on the capacity of their system,
which is very robust.
However, if a major earthquake on the San Andreas Fault occurs, it will be damaging to all three key
regional water aqueducts and disrupt imported supplies for up to six months. The region would likely
impose a water use reduction ranging from 10-25% until the system is repaired. However, MET has taken
proactive steps to handle such disruption, such as constructing DVL, which mitigates potential impacts.
DVL, along with other local reservoirs, can store a six to twelve-month supply of emergency water(MET,
2021).
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7.3 'Nater Service Reliability Assessment
This Section assesses the City's reliability to provide water services to its customers under various
hydrological conditions. This is completed by comparing the projected long-term water demand
(Section 4), to the projected water supply sources available to the City (Section 6), in five-year
increments, for a normal water year, a single dry water year, and a drought lasting five consecutive
water years.
7.3.1 Normal Year Reliability
The water demand forecasting model developed for the Demand Forecast TM (described in Section 4.3),
to project the 25-year demand for Orange County water agencies, also isolated the impacts that weather
and future climate can have on water demand through the use of a statistical model. The explanatory
variables of population, temperature, precipitation, unemployment rate, drought restrictions, and
conservation measures were used to create the statistical model. The impacts of hot/dry weather
condition are reflected as a percentage increase in water demands from the average condition. The
average (normal) demand is represented by the average water demand of FY 2017-18 and FY 2018-19
(CDM Smith, 2021).
The City is 100% reliable for normal year demands from 2025 through 2045 (Table 7-2) due to diversified
supply and conservation measures. For simplicity, the table shows supply to balance demand in the table.
However, the City can purchase more MET water through EOCWD/MWDOC, should the need arise. The
City has entitlements to receive imported water from MET through MWDOC and purchased from its
wholesaler EOCWD via connections to MET's regional distribution system. All imported water supplies
are assumed available to the City from existing water transmission facilities, as per MET and MWDOC's
2020 UWMPs. The demand and supplies listed in Table 7-2 also include local groundwater supplies that
are available to the City through OCWD by an assumed BPP of 85%, as per Section 6.3.4.
Table 7-2: Retail: Normal Year Supply and Demand Comparison
DWR Submittal Table • • • • Demand
Comparison
2025 2030 2035 2040 2045
Supply totals (AF) 10,081 10,122 10,025 9,929 9,898
Demand totals (AF) 10,081 10,122 10,025 9,929 9,898
Difference (AF) 0 0 0 0 0
NOTES:
This table compares the projected demand and supply volumes determined in
Sections 4.3.2 and 6.1, respectively.
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7.3.2 Single Dry Year Reliability
A single dry year is defined as a single year of minimal to no rainfall within a period where average
precipitation is expected to occur. The water demand forecasting model developed for the Demand
Forecast TM (described in Section 4.3) isolated the impacts that weather and future climate can have on
water demand through the use of a statistical model. The impacts of hot/dry weather condition are
reflected as a percentage increase in water demands from the normal year condition (average of FY
2017-18 and FY 2018-19). For a single dry year condition (FY 2013-14), the model projects a 6%
increase in demand for the OC Basin area where the City's service area is located (CDM Smith, 2021).
Detailed information of the model is included in Appendix E.
The City has documented that it is 100% reliable for single dry year demands from 2025 through
2045 with a demand increase of 6% from normal demand with significant reserves held by MET, local
groundwater supplies, and conservation. A comparison between the supply and the demand in a single
dry year is shown in Table 7-3. For simplicity, the table shows supply to balance demand in the table.
However, the City can purchase more MET water through EOCWD/MWDOC, should the need arise.
able 7-3: Retail: Single Dry Year Supply and Demand Comparison
SubmittalDWR •le 7-3 Retail: Single Dry Year Supply and Demand
Comparison
2025 2030 2035 2040 2045
Supply totals (AF) 10,686 10,729 10,627 10,525 10,491
Demand totals (AF) 10,686 10,729 10,627 10,525 10,491
Difference (AF) 0 0 0 0 0
NOTES:
It is conservatively assumed that a single dry year demand is 6%greater than
each respective year's normally projected demand. Groundwater is sustainably
managed through the BPP and robust management measures (Section 6.3.4 and
Appendix G); indirect recycled water uses provide additional local supply
(Section 6.6); and based on MET's and MWDOC's UWMPs, imported water is
available to close any water supply gap that local sources cannot meet.
7.3.3 Multiple Dry Year Reliability
Assessing the reliability to meet demand for five consecutive dry years is a new requirement for the
2020 UWMP, as compared to the previous requirement of assessing three or more consecutive dry years.
Multiple dry years are defined as five or more consecutive dry years with minimal rainfall within a period of
average precipitation. The water demand forecasting model developed for the Demand Forecast TM
(described in Section 4.3) isolated the impacts that weather and future climate can have on water
demand through the use of a statistical model. The impacts of hot/dry weather condition are reflected as a
percentage increase in water demands from the normal year condition (average of FY 2017-18 and
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FY 2018-19). For a single dry year condition (FY 2013-14), the model projects a 6% increase in demand
for the OC Basin area where the City's service area is located (CDM Smith, 2021). It is conservatively
assumed that a five consecutive dry year scenario is a repeat of the single dry year over five consecutive
years.
Even with a conservative demand increase of 6% each year for five consecutive years, the City is
capable of meeting all customers' demands from 2025 through 2045 (Table 7-4), with significant reserves
held by MET and conservation. For simplicity, the table shows supply to balance demand in the table.
However, the City can purchase more MET water through EOCWD/MWDOC, should the need arise.
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Table 7-4: Retail: Multiple Dry Years Supply and Demand Comparison
DWR Submittal Table 7-4 Retail: Multiple Dry Years Supply and Demand Comparison (AF)
2025 2030 2035 2040 2045
Supply totals 10,996 10,695 10,709 10,606 10,518
First year Demand totals 10,996 10,695 10,709 10,606 10,518
Difference 0 0 0 0 0
Supply totals 10,919 10,703 10,688 10,586 10,511
Second year Demand totals 10,919 10,703 10,688 10,586 10,511
Difference 0 0 0 0 0
Supply totals 10,841 10,712 10,668 10,565 10,505
Third year Demand totals 10,841 10,712 10,668 10,565 10,505
Difference 0 0 0 0 0
Supply totals 10,763 10,721 10,647 10,545 10,498
Fourth year Demand totals 10,763 10,721 10,647 10,545 10,498
Difference 0 0 0 0 0
Supply totals 10,686 10,729 10,627 10,525 10,491
Fifth year Demand totals 10,686 10,729 10,627 10,525 10,491
Difference 0 0 0 0 0
NOTES:
It is conservatively assumed that a multiple dry year scenario is a repeat of the single dry year(106% of
projected values) over five consecutive years.The 2025 column assesses supply and demand for FY
2020-21 through FY 2024-25;the 2030 column assesses FY 2025-26 through FY 2029-30 and so forth, in
order to end the water service reliability assessment in FY 2044-45.
Groundwater is sustainably managed through the BPP and robust management measures (Section 6.3.4
and Appendix G); indirect recycled water uses provide additional local supply(Section 6.6); and based
on MET's and MWDOC's 2020 UWMPs, imported water is available to close any water supply gap that
local sources cannot meet (Section 7.5.1).
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7.4 Management Tools and Ontions
Existing and planned water management tools and options for the City and MWDOC's service area that
seek to maximize local resources and result in minimizing the need to import water are described below.
• Reduced Delta Reliance: MET has demonstrated consistency with Reduced Reliance on the
Delta Through Improved Regional Water Self-Reliance (Delta Plan policy WR P1) by reporting
the expected outcomes for measurable reductions in supplies from the Delta. MET has improved
its self-reliance through methods including water use efficiency, water recycling, stormwater
capture and reuse, advanced water technologies, conjunctive use projects, local and regional
water supply and storage programs, and other programs and projects. In 2020, MET had a
602,000 AF change in supplies contributing to regional-self-reliance, corresponding to a
15.3% change, and this amount is projected to increase through 2045 (MET, 2021). For detailed
information on the Delta Plan Policy WR P1, refer to Appendix C.
• The continued and planned use of groundwater: The water supply resources within
MWDOC's service area are enhanced by the existence of groundwater basins that account for
the majority of local supplies available and are used as reservoirs to store water during wet years
and draw from storage during dry years, subsequently minimizing MWDOC's reliance on
imported water. Groundwater basins are managed within a safe basin operating range so that
groundwater wells are only pumped as needed to meet water use. Although MWDOC does not
produce or manage recycled water, MWDOC supports and partners in recycled water efforts,
including groundwater recharge. A City-specific example of this effort includes the City's plan to
build a centralized treatment facility and redrill the Beneta Well to ensure reliable local
groundwater, described in Section 6.9.
• Groundwater storage and transfer programs: MWDOC and OCWD's involvement in
SARCCUP includes participation in a conjunctive use program that improves water supply
resiliency and increases available dry-year yield from local groundwater basins. The groundwater
bank has 137,000 AF of storage (OCWD, 2020b). Additionally, MET has numerous groundwater
storage and transfer programs in which MET endeavors to increase the reliability of water
supplies, including the AVEK Waster Agency Exchange and Storage Program and the High
Desert Water Bank Program. The IRWD Strand Ranch Water Banking Program has
approximately 23,000 AF stored for IRWD's benefit, and by agreement, the water is defined to be
an "Extraordinary Supply" by MET and counts essentially 1:1 during a drought/water shortage
condition under MET's Water Supply Allocation Plan. In addition, MET has encouraged storage
through its cyclic and conjunctive use programs that allow MET to deliver water into a
groundwater basin in advance of agency demands, such as the Cyclic Storage Agreements
under the Main San Gabriel Basin Judgement.
• Water Loss Program: The water loss audit program reduces MWDOC's dependency on
imported water from the Delta by implementing water loss control technologies after assessing
audit data and leak detection.
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• Increased use of recycled water: MWDOC partners with local agencies in recycled water
efforts, including OCWD to identify opportunities for the use of recycled water for irrigation
purposes, groundwater recharge and some non-irrigation applications. OCWD's GWRS and
GAP allow Southern California to decrease its dependency on imported water and create a local
and reliable source of water that meet or exceed all federal and state drinking level standards.
Expansion of the GWRS is currently underway to increase the plant's production to 130 MGD,
and further reduce reliance on imported water.
• Implementation of demand management measures during dry periods: During dry periods,
water reduction methods to be applied to the public through the retail agencies, will in turn reduce
MWDOC's overall demands on MET and reliance on imported water. MWDOC is assisting its
retail agencies by leading the coordination of Orange County Regional Alliance for all of the retail
agencies in Orange County. MWDOC assists each retail water supplier in Orange County in
analyzing the requirements of and establishing their baseline and target water use, as guided by
DWR. The City's specific demand management measures (DMMs) are further discussed in
Section 9.
7.5 Drought Risk Assessment
Water Code Section 10635(b) requires every urban water supplier include, as part of its UWMP, a
DRA for its water service as part of information considered in developing its DMMs and water supply
projects and programs. The DRA is a specific planning action that assumes the City is experiencing a
drought over the next five years and addresses the City's water supply reliability in the context of
presumed drought conditions. Together, the water service reliability assessment (Sections 7.1 through
7.3), DRA, and WSCP (Section 8 and Appendix H) allow the City to have a comprehensive picture of its
short-term and long-term water service reliability and to identify the tools to address any perceived or
actual shortage conditions.
Water Code Section 10612 requires the DRA to be based on the driest five-year historic sequence of the
City's water supply. However, Water Code Section 10635 also requires that the analysis consider
plausible changes on projected supplies and demands due to climate change, anticipated regulatory
changes, and other locally applicable criteria.
The following sections describe the City's methodology and results of its DRA.
7.5.1 DRA Methodology
The water demand forecasting model developed for the Demand Forecast TM (described in Section 4.3
isolated the impacts that weather and future climate can have on water demand through the use of a
statistical model. The impacts of hot/dry weather condition are reflected as a percentage increase in
water demands from the average condition (average of FY 2017-18 and FY 2018-19). For a single dry
year condition (FY 2013-14), the model projects a 6% increase in demand for the region encompassing
the City's service area (CDM Smith, 2021).
Locally, the five-consecutive years of FY 2011-12 through FY 2015-16 represent the driest five
consecutive year historic sequence for the City's water supply. This period that spanned water years
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2012 through 2016 included the driest four-year statewide precipitation on record (2012-2015) and the
smallest Sierra-Cascades snowpack on record (2015, with 5% of average). It was marked by
extraordinary heat: 2014, 2015 and 2016 were California's first, second and third warmest year in terms
of statewide average temperatures. Locally, Orange County rainfall for the five year period totaled
36 inches, the driest on record.
As explained in Section 6, the City currently relies on, and will continue to rely on, two main water
sources: local groundwater and imported water supply from EOCWD through MWDOC / MET. The City
maximizes local water supply use before the purchase of imported water. The difference between
total forecasted potable demands and local groundwater supply projections is the demand on
MWDOC's imported water supplies, which are supplied by MET. Local groundwater supply for the City
comes from the OC Basin and is dictated by the BPP set annually by OCWD. Therefore, the City's
DRA focuses on the assessment of imported water from MWDOC / MET, which will be used to close any
local water supply gap. This assessment aligns with the DRA presented in MWDOC's 2020 UWMP.
Water Demand Characterization
All of MWDOC's water supplies are purchased from MET, regardless of hydrologic conditions.
As described in Section 6.2, MET's supplies are from the Colorado River, SWP, and in-region storage.
In its 2020 UWMP, MET's DRA concluded that even without activating WSCP actions, MET can reliably
provide water to all of their member agencies, including MWDOC, and in effect the City, assuming a
five-year drought from FY 2020-21 through FY 2024-25. Beyond this, MET's DRA indicated a surplus of
supplies that would be available to all of its member agencies, including MWDOC, should the need arise.
Therefore, any increase in demand that is experienced in MWDOC's service area, which includes the
City, will be met by MET's water supplies.
Based on the Demand Forecast TM, in a single dry year, demand is expected to increase by 6% above a
normal year. Both MWDOC and the City's DRA conservatively assumes a drought from FY 2020-21
through FY 2024-25 is a repeat of the single dry year over five consecutive years.
The City's demand projections were developed as part of the Demand Forecast TM, led by MWDOC. As
part of the study, MWDOC first estimated total retail demands for its service area. This was based on
estimated future demands using historical water use trends, future expected water use efficiency
measures, additional projected land-use development, and changes in population. The City's projected
water use, linearly interpolated per the demand forecast, is presented annually for the next five years in
Table 4-2. Next, MWDOC estimated the projections of local supplies derived from current and expected
local supply programs from their member agencies. Finally, the demand model calculated the difference
between total forecasted demands and local supply projections. The resulting difference between total
demands net of savings from conservation and local supplies is the expected regional demands on
MWDOC from their member agencies, such as the City.
Water Supply Characterization
MWDOC's assumptions for its supply capabilities are discussed and presented in 5-year increments
under its 2020 UWMP water reliability assessment. For MWDOC's DRA, these supply capabilities are
further refined and presented annually for the years 2021 to 2025 by assuming a repeat of historic
conditions from FY 2011-12 to FY 2015-16. For its DRA, MWDOC assessed the reliability of supplies
available to MWDOC through MET using historical supply availability under dry-year conditions.
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MET's supply sources under the Colorado River, SWP, and in-region supply categories are individually
listed and discussed in detail in MET's UWMP. Future supply capabilities for each of these supply
sources are also individually tabulated in Appendix 3 of MET's UWMP, with consideration for plausible
changes on projected supplies under climate change conditions, anticipated regulatory changes, and
other factors. MWDOC's supplies are used to meet consumptive use, surface water and groundwater
recharge needs that are in excess of locally available supplies. In addition, MWDOC has access to supply
augmentation actions through MET. MET may exercise these actions based on regional need, and in
accordance with their WSCP, and may include the use of supplies and storage programs within the
Colorado River, SWP, and in-region storage.
7.5.2 Total Water Supply and Use Comparison
The City's DRA reveals that its supply capabilities are expected to balance anticipated total water use and
supply, assuming a five-year consecutive drought from FY 2020-21 through FY 2024-25 (Table 7-5). For
simplicity, the table shows supply to balance the modeled demand in the table. However, the City can
purchase more MET water from EOCWD/MWDOC, should the need arise.
Fable 7-5: Five-Year Drought Risk Assessment Tables to Address Water Code Section 10635(b)
Submittal Table • • • address
Water • • - Section 10635(b)
Tota I
Total Water Use 10,996
Total Supplies 10,996
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions(use reduction and supply augmentation)
WSCP -supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting% Use Reduction from WSCP action 0%
2022 Total
Total Water Use 10,919
Total Supplies 10,919
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions(use reduction and supply augmentation)
WSCP -supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting% Use Reduction from WSCP action 0%
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TableSubmittal . . address
Water . . - Section 10635(b)
Total
Total Water Use 10,841
Total Supplies 10,841
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions(use reduction and supply augmentation)
WSCP-supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting% Use Reduction from WSCP action 0%
2024 Total
Total Water Use 10,763
Total Supplies 10,763
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions(use reduction and supply augmentation)
WSCP-supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting% Use Reduction from WSCP action 0%
2025 Total
Total Water Use 10,686
Total Supplies 10,686
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions(use reduction and supply augmentation)
WSCP-supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting% Use Reduction from WSCP action 0%
Note: Groundwater is sustainably managed through the BPP and robust management measures (Section
6.3.4 and Appendix G), direct and indirect recycled water uses provide additional local supply (Section
6.6); indirect recycled water uses provide additional local supply (Section 6.6); and based on MET's and
MWDOC's UWMPs, imported water is available to close any potable water supply gap that local sources
cannot meet (Section 7.5.1).
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7.5.3 Water Source Reliability
Locally, approximately 77% (BPP for Water Year 2021-22) of the City's total water supply can rely on
OC Basin groundwater through FY 2024-25. The BPP is projected to increase to 85% starting in
FY 2024-25. Based on various storage thresholds and hydrologic conditions, OCWD, who manages the
OC Basin, has numerous management measures that can be taken, such as adjusting the BPP or
seeking additional supplies to refill the basin, to ensure the reliability of the Basin. For more information
on the OC Basin's management efforts, refer to Section 6.3.
Additionally, the City's use of indirect recycled water (OCWD GWRS) should also be considered.
The ability to continue producing water locally greatly improves the City's water reliability. More detail on
these programs is available in Section 6.6.
Moreover, although they would not normally be considered part of the City's water portfolio, the
four emergency interconnections the City has with GSWC, the City of Santa Ana, and IRWD could
help mitigate any water supply shortages, though shortages are not expected.
The City's DRA concludes that its water supplies meet total water demand, assuming a five-year
consecutive drought from FY 2020-21 through FY 2024-25 (Table 7-5). For simplicity, the table shows
supply to balance the modeled demand in the table. However, the City can purchase more MET water
from EOCWD/MWDOC, should the need arise.
As detailed in Section 8, the City has in place a robust WSCP and comprehensive shortage response
planning efforts that include demand reduction measures and supply augmentation actions.
However, since the City's DRA shows a balance between water supply and demand, no water service
reliability concern is anticipated, and no shortfall mitigation measures are expected to be exercised over
the next five years. The City and its wholesale supplier, MWDOC, will periodically revisit its representation
of the supply sources and of the gross water use estimated for each year, and will revise its DRA if
needed.
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8 WATER SHORTAGE CONTINGENCY PLANNING
Layperson Descriptior
Water shortage contingency planning is a strategic planning process that the City engages to prepare
for and respond to water shortages. A water shortage, when water supply available is insufficient to meet
the normally expected customer water use at a given point in time, may occur due to a number of
reasons, such as water supply quality changes, climate change, drought, and catastrophic events
(e.g., earthquake). The City's WSCP provides real-time water supply availability assessment and
structured steps designed to respond to actual conditions. This level of detailed planning and preparation
will help maintain reliable supplies and reduce the impacts of supply interruptions.
The Water Code Section 10632 requires that every urban water supplier that serves more than
3,000 AFY or have more than 3,000 connections prepared and adopt a standalone WSCP as part of its
UWMP. The WSCP is required to plan for a greater than 50% supply shortage. This WSCP due to be
updated based on new requirements every five years and will be adopted as a current update for
submission to DWR by July 1, 2021.
Overview of the WSCP
The WSCP serves as the operating manual that the City will use to prevent catastrophic service
disruptions through proactive, rather than reactive, mitigation of water shortages. The WSCP contains
processes and procedures documented in the WSCP, which are given legal authority through the
WSCP Response Ordinance. This way, when shortage conditions arise, the City's governing body, its
staff, and the public can easily identify and efficiently implement pre-determined steps to mitigate a water
shortage to the level appropriate to the degree of water shortfall anticipated. Figure 8-1 illustrates the
interdependent relationship between the three procedural documents related to planning for and
responding to water shortages.
Urban . . - *'* A comprehensive water
• management action plan to assess
water supply reliability.
.................................................................................................................................................................................................................................................................................................
_ A detailed plan to predict and
mitigate a water shortage
condition.
Water Shortage Contingency Provides the legal authority to
Response Ordinance --'
enforce the Water Shortage
Contingency Plan
Figure 8-1: UWMP Overview
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A copy of the City's WSCP is provided in Appendix H and includes the steps to assess if a water shortage
is occurring, and what level of shortage drought actions to trigger the best response as appropriate to the
water shortage conditions. WSCP has prescriptive elements, including an analysis of water supply
reliability; the drought shortage actions for each of the six standard water shortage levels, that correspond
to water shortage percentages ranging from 10% to greater than 50%; an estimate of potential to close
supply gap for each measure; protocols and procedures to communicate identified actions for any current
or predicted water shortage conditions; procedures for an annual water supply and demand assessment;
monitoring and reporting requirements to determine customer compliance; and reevaluation and
improvement procedures for evaluating the WSCP.
8.3 Summary of Water Shortage Response Strategy and Required
DWR Tables
This WSCP is organized into three main sections with Section 3 aligned with the Water Code Section
16032 requirements.
Section 1 Introduction and WSCP Overview gives an overview of the WSCP fundamentals.
Section 2 Background provides a background on the City's water service area.
Section 3.1 Water Supply Reliability Analysis provides a summary of the water supply analysis and
water reliability findings from the 2020 UWMP.
Section 3.2 Annual Water Supply and Demand Assessment Procedures provide a description of
procedures to conduct and approve the Annual Assessment.
Section 3.3 Six Standard Water Shortage Stages explains the WSCP's six standard water shortage
levels corresponding to progressive ranges of up to 10, 20, 30, 40, 50, and more than 50% shortages.
Section 3.4 Shortage Response Actions describes the WSCP's shortage response actions that align
with the defined shortage levels.
Section 3.5 Communication Protocols addresses communication protocols and procedures to inform
customers, the public, interested parties, and local, regional, and state governments, regarding any
current or predicted shortages and any resulting shortage response actions.
Section 3.6 Compliance and Enforcement describes customer compliance, enforcement, appeal, and
exemption procedures for triggered shortage response actions.
Section 3.7 Legal Authorities is a description of the legal authorities that enable the City to implement
and enforce its shortage response actions.
Section 3.8 Financial Consequences of the WSCP provides a description of the financial
consequences of and responses for drought conditions.
Section 3.9 Monitoring and Reporting describes monitoring and reporting requirements and procedures
that ensure appropriate data is collected, tracked, and analyzed for purposes of monitoring customer
compliance and to meet state reporting requirements.
Section 3.10 WSCP Refinement Procedures addresses reevaluation and improvement procedures for
monitoring and evaluating the functionality of the WSCP.
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Section 3.11 Special Water Feature Distinction is a required definition for inclusion in a WSCP per the
Water Code.
Section 3.12 Plan Adoption, Submittal, and Implementation provides a record of the process the City
followed to adopt and implement its WSCP.
The WSCP is based on adequate details of demand reduction and supply augmentation measures that
are structured to match varying degrees of shortage will ensure the relevant stakeholders understand
what to expect during a water shortage situation. The City has adopted water shortage levels consistent
with the requirements identified in Water Code Section 10632 (a)(3)(A) (Table 8-1 Table 8-1).
The supply augmentation actions that align with each shortage level are described in DWR Table 8-3
(Appendix B). These augmentations represent short-term management objectives triggered by the WSCP
and do not overlap with the long-term new water supply development or supply reliability enhancement
projects.
The demand reduction measures that align with each shortage level are described in DWR Table 8-2
(Appendix B). This table also estimates the extent to which that action will reduce the gap between
supplies and demands to demonstrate to the that choose suite of shortage response actions can be
expected to deliver the expected outcomes necessary to meet the requirements of a given shortage level.
Table 8-1:Water Shortage Contingency Plan Levels
Submittal Table 8-1
Water Shortage Contingency Plan Levels
Shortage Percent
Shortage Response Actions
Level Shortage Range
A Level 0 Water Supply Shortage—Condition exists when the City notifies
its water users that no supply shortages are anticipated in this year. The
City will proceed with planned water efficiency best practices to support
0 0% (Normal) consumer demand reduction in line with state mandated requirements and
City goals for water supply reliability.The City has adopted a permanent 10
percent annual reduction strategy through year-around landscape
irrigation schedules, as well as other permanent water waste prohibitions in
place as stipulated in the City's Water Management Plan Ordinance.
A Level 1 Water Supply Shortage—Condition exists when the City notifies
its water users that due to drought or other supply reductions, a consumer
demand reduction of up to 10% is necessary to make more efficient use of
1 Up to 10% water and respond to existing water conditions.The City shall implement
the mandatory Level 1 conservation measures identified in this ordinance.
The type of event that may prompt the City to declare a Level 1 Water
Supply Shortage may include, among other factors, a finding that its
wholesale water provider calls for extraordinary water conservation.
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Submittal Table 8-1
Water Shortage Contingency Plan Levels
Shortage Percent
Shortage Response Actions
Level Shortage Range
A Level 2 Water Supply Shortage—Condition exists when the City notifies
its water users that due to drought or other supply reductions, a consumer
2 11%to 20% demand reduction of up to 20% is necessary to make more efficient use of
water and respond to existing water conditions. Upon declaration of
a Level 2 Water Supply Shortage condition,the City shall implement the
mandatory Level 2 conservation measures identified in this ordinance.
A Level 3 Water Supply Shortage—Condition exists when the City declares a
water shortage emergency condition pursuant to California Water Code
section 350 and notifies its residents and businesses that up to 30%
3 21%to 30% consumer demand reduction is required to ensure sufficient supplies for
human consumption, sanitation and fire protection.The City must declare a
Water Supply Shortage Emergency in the manner and on the grounds
provided in California Water Code section 350.
A Level 4 Water Supply Shortage -Condition exists when the City declares a
water shortage emergency condition pursuant to California Water Code
section 350 and notifies its residents and businesses that up to 40%
4 31%to 40% consumer demand reduction is required to ensure sufficient supplies for
human consumption, sanitation and fire protection.The City must declare a
Water Supply Shortage Emergency in the manner and on the grounds
provided in California Water Code section 350.
A Level 5 Water Supply Shortage-Condition exists when the City declares a
water shortage emergency condition pursuant to California Water Code
section 350 and notifies its residents and businesses that up to 50%or more
5 41%to 50% consumer demand reduction is required to ensure sufficient supplies for
human consumption, sanitation and fire protection.The City must declare a
Water Supply Shortage Emergency in the manner and on the grounds
provided in California Water Code section 350.
A Level 6 Water Supply Shortage—Condition exists when the City declares a
water shortage emergency condition pursuant to California Water Code
section 350 and notifies its residents and businesses that greater than 50%
6 >50% or more consumer demand reduction is required to ensure sufficient
supplies for human consumption, sanitation and fire protection.
The City must declare a Water Supply Shortage Emergency in the manner
and on the grounds provided in California Water Code section 350.
NOTES:
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Water shortage contingency planning is a strategic planning process to prepare for and respond to water
shortages. Detailed planning and preparation can help maintain reliable supplies and reduce the impacts
of supply interruptions. This chapter provides a structured plan for dealing with water shortages,
incorporating prescriptive information and standardized action levels, along with implementation actions in
the event of a catastrophic supply interruption.
A well-structured WSCP allows real-time water supply availability assessment and structured steps
designed to respond to actual conditions, to allow for efficient management of any shortage with
predictability and accountability. A water shortage, when water supply available is insufficient to meet the
normally expected customer water use at a given point in time, may occur due to a number of reasons,
such as population growth, climate change, drought, and catastrophic events. The WSCP is the City's
operating manual that is used to prevent catastrophic service disruptions through proactive, rather than
reactive, management. This way, if and when shortage conditions arise, the City's governing body, its
staff, and the public can easily identify and efficiently implement pre-determined steps to manage a water
shortage.
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9 DEMAND MANAGEMENT MEASURES
The City, along with other Retail water agencies throughout Orange County, recognizes the need to use
existing water supplies efficiently. This ethic of efficient use of water has evolved as a result of the
development and implementation of water use efficiency programs that make good economic sense and
reflect responsible stewardship of the region's water resources. The City works closely with MWDOC to
promote regional efficiency by participating in the regional water savings programs, leveraging
MWDOC local program assistance, and applying the findings of MWDOCs research and evaluation
efforts. This chapter communicates the City's efforts to promote conservation and to reduce demand on
water supplies. A detailed description of demand management measures is available in Appendix J.
Oemand Management Measures for Retail Suppliers
The goal of the DMM section is to provide a comprehensive description of the water conservation
programs that a supplier has implemented, is currently implementing, and plans to implement in order to
meet its urban water use reduction targets. The reporting requirements for DMM has been significantly
modified and streamlined in 2014 by Assembly Bill 2067. Additionally, this section of the UWMP will
report on the role of MWDOC's programs in meeting new state regulations for complying with the
SWRCB's new Conservation Framework. These categories of demand management measures are as
follows:
• Water waste prevention ordinances;
• Metering;
• Conservation pricing;
• Public education and outreach;
• Programs to assess and manage distribution system real loss;
• Water conservation program coordination and staffing support;
• Other DMMs that have a significant impact on water use as measured in GPCD, including
innovative measures, if implemented;
• Programs to assist retailers with Conservation Framework Compliance.
9.1.1 Water Waste Prevention Ordinances
City Council adopted the Ordinance No. 1477 on April 4, 2017 to amend the City's Water Management
Plan in response of the State-mandated water conservation requirements and regulations including
Executive Order B-29-15 on April 1, 2015 instituting emergency actions and mandatory water use
reductions for the State of California and Urban Water Suppliers, and Executive Order B-37-16 on May 9,
2016 instituting permanent, mandatory water use restrictions for the State of California.
The ordinance establishes four stages of increasingly restrictive prohibitions as described below:
• Stage 1 Water Watch (voluntary compliance) applies all elements of Stage 2 on a voluntary basis.
• Stage 2 Water Alert (mandatory compliance) establishes water conservation measures
associated to:
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o Limit on lawn watering and landscape irrigation
o Irrigation of landscapes shall not occur during and forty-eight (48) hours following measurable
precipitation.
o No washing down hard or paved surfaces
o Limit washing of autos, trucks, mobile homes, buses, trailers, boats, airplanes, and other
types of mobile equipment to quick rinses.
o Limit on watering parks, school grounds, public facilities, and recreational fields.
o Restaurants shall not serve water to their customers except when specifically requested
o Hotels and motels must provide guests with the option of choosing not to have towels and
linens laundered daily
o The operation of any ornamental fountain or similar structure is prohibited unless the fountain
or structure internally recycles the water it uses
o All water leaks shall be repaired immediately
o Agriculture users and commercial nurseries as defined in the MET water code are exempt
from STAGE 2 irrigation restrictions
o The "dump and fill" practice of swimming pool maintenance is prohibited.
o Customers that use turf for beneficial public use may apply for an exemption from the
designated irrigation day provision of Stage 2
• Stage 3 Water Warning (mandatory compliance) applies all of Stage 2 water conservation
measures plus additional restrictive measures.
• Stage 4 Water Emergency (mandatory compliance) applies all of Stage 3 water conservation
measures plus additional restrictive measures.
The provisions and water conservation measures to be implemented in response to each shortage level
are described in the WSCP located in Appendix H of this 2020 UWMP. The City's water conservation
ordinance is included in Appendix B of the WSCP. As of publication of this UWMP, this Ordinance is
scheduled to be replaced with an updated in 2021.
9.1.2 Metering
The City requires meters for all new water connections and bills by volume of use. All water service
connections, with the exception of some dedicated fire services, are metered. The City will continue to
require metering for all connections.
City has a proactive meter replacement program based on meter throughput, or volume of water that
moves through the meter, level. The City will replace a meter after it reaches a defined throughput level,
which is 5,000 HCF for residential and 3,000 HCF for CII meters.
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9.1.3 Conservation Pricing
Customers are billed bimonthly on the basis of a capital charge, a fixed charge based on meter size and,
as of February 1, 2020, the City of Tustin moved to a fixed-rate fee system from a tiered-rate system.
All customers are charged a flat fee of$2.79 for each unit of water (748 gallons) used regardless of how
much water is consumed. Since 2014, Tustin's unit cost has ranged from $0.84 to $4.05 per unit
depending on amount of usage (i.e., tiered system).
Water rates are developed through a comprehensive cost-of-service study that examines the water rates
to the actual cost of providing water service. To determine the appropriate rate structure for Tustin, the
City's water rate consultant reviewed the current rate structure and consumption data along with ongoing
operational, maintenance, capital, and bond obligations to determine the new rate structure approach.
Between 2021 and 2024, the new unit cost of$2.79 will increase by 22% as part of this five-year rate
plan. The 2020 through 2024 consumption charges are shown in Table 9-1.
Table 9-1:Water Usage Rates
Effective Effective Effective Effective Effective
2/1/2020 1 1 11/1/2024
$2.79 $2.93 $3.08 $3.24 $3.41
9.1.4 Public Education and Outreach
The City's public education and outreach program is administered by MWDOC, its wholesale supplier.
MWDOC develops, coordinates, and delivers a substantial number of public information, education, and
outreach programs aimed at elevating water agency and consumer awareness and understanding of
current water issues as well as efficient water use and water-saving practices, sound policy, and water
reliability investments that are in the best interest of the region. These efforts encourage good water
stewardship that benefit all City residents, businesses, and industries across all demographics.
Several examples are included below:
Print and Electronic Materials
MWDOC offers a variety of print and electronic materials that are designed to assist City water users of all
ages in discovering where their water comes from, what the MWDOC and other water industry
professionals are doing to address water challenges, how to use water most efficiently, and more.
Through the MWDOC's robust social media presence, award-winning website, eCurrents newsletter,
media tool kits, public service announcements (PSAs), flyers, brochures, and other outreach materials,
MWDOC ensures that stakeholders are equipped with sufficient information and subject knowledge to
assist them in making good behavioral and civic choices that ultimately affect the quality and quantity of
the region's water supply.
Public Events
Each year, MWDOC hosts an array of public events intended to engage a diverse range of water users in
targeted discussions and actions that homes in on their specific interests or needs. Some of these public
events include:
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• MWDOC Water Policy Forums and Orange County Water Summit are innovative and
interactive symposiums that bring together hundreds of business professionals, elected officials,
water industry stakeholders, and community leaders from throughout the state for a discussion on
new and ongoing water supply challenges, water policy issues, and other important topics that
impact our water supply, economy, and public health.
• Inspection Trips of the state's water supply systems are sponsored each year by MWDOC and
MET. Orange County elected officials, residents, business owners, and community leaders are
invited to tour key water facilities throughout the state and learn more about the critical planning,
procurement, and management of Southern California's water supply, as well as the issues
surrounding delivery and management of our most precious natural resource—water.
• Community Events and Events Featuring MWDOC Mascot Ricky the Rambunctious
Raindrop provide opportunities to interact with Orange County water users in a fun and friendly
way, offer useful water-related information or education, and engage them in important
discussions about the value of water and how their decisions at home, at work, and as tax-or
ratepayers may impact Orange County's quality and quantity of water for generations to come.
Education Programs and Initiatives
Over the past several years, MWDOC has amplified its efforts in water education programs and activities
for Orange County's youngest water users. This is accomplished by continuing to grow professional
networks and partnerships that consist of leading education groups, advisors, and teachers, and by
leading the way for the MWDOC and its 28 member agencies to be key contributors of both Southern
California and Orange County water-centric learning. Several key water education programs and
initiatives include:
• Environmental Literacy is an individual's awareness of the interconnectedness and
interdependency between people and natural systems, being able to identify patterns and
systems within their communities, while also gathering evidence to argue points and solve
problems. By using the environment as the context for learning, K-12 students gain real-world
knowledge by asking questions and solving problems that directly affect them, their families, and
their communities. This approach to K-12 education builds critical thinking skills and promotes
inquiry, and is the foundation for all MWDOC education programs, initiatives, and activities.
• MWDOC Choice School Programs have provided Orange County K-12 students water-focused
learning experiences for nearly five (5) decades. Interactive, grade-specific lessons invite
students to connect with, and learn from, their local ecosystems, guiding them to identify and
solve local water-related environmental challenges affecting their communities. Choice School
Programs are aligned with state standards, and participation includes a dynamic in-class or virtual
presentation, and pre- and post-activities that encourage and support Science Technology
Engineering Arts and Mathematics (STEAM)-based learning and good water stewardship.
• Water Energy Education Alliance (WEEA) is a coalition of education and water and energy
industry professionals led by MWDOC that works together to build and bolster Career Technical
Education programs (CTE) for Southern California high school students. These CTEs focus on
workforce pathways in the Energy, Environment, and Utility Sectors, and connections established
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through this powerful Southern California alliance assist stakeholders as they thoughtfully step up
their investment in the education and career success of California's future workforce.
• MWDOC Water Awareness Poster Contest is an annual activity developed to encourage
Orange County's K-12 students to investigate and explore their relationship to water, connect the
importance of good water stewardship to their daily lives, and express their conclusions creatively
through art. Each year, MWDOC receives hundreds of entries, and 40 winners from across
Orange County are invited to attend a special awards ceremony with their parents and teachers,
and Ricky the Rambunctious Raindrop.
• Boy Scouts Soil and Water Conservation Merit Badge and Girl Scouts Water Resources
and Conservation Patch Programs guide Orange County Scouts on a learning adventure of
where their water comes from, the importance of Orange County water resources, and how to be
water efficient. These STEAM-based clinics are hosted by MWDOC and include interactive
learning stations, hands-on activities, and a guided tour of an Orange County water source, water
treatment facility, or ecological reserve.
• Partnerships are an integral part of achieving water-related goals that impact all Orange County
water users. MWDOC's partner list is extensive, and acts as a collective catalyst for all those
involved to grow and prosper. Some of the MWDOC's most recognized partners include local,
regional, state, and federal legislators, educators, water and energy industry leaders,
environmental groups, media, and business associations all focused on the common goals of
water education, water use efficiency, and advocacy on behalf of the region.
9.1.5 Programs to Assess and Manage Distribution System Real Loss
Senate Bill 1420 signed into law in September 2014 requires urban water suppliers that submit
UWMPs to calculate annual system water losses using the water audit methodology developed by the
AWWA. SB 1420 requires the water loss audit be submitted to DWR every five years as part of the
urban water supplier's UWMP. Water auditing is the basis for effective water loss control.
DWR's UWMP Guidebook include a water audit manual intended to help water utilities complete the
AWWA Water Audit on an annual basis. A Water Loss Audit was completed for the City which identified
areas for improvement and quantified total loss. Based on the data presented, the three priority areas
identified were water imported, billed metered, and customer metering inaccuracies. Multiple criteria are a
part of each validity score and a system wide approach will need to be implemented for the City's
improvement. Expressing water loss audit results in terms of Real Losses per Service Connection per
Day allows for standardized comparison across MWDOC retailer agencies and is a metric consistent with
the Water Board's forthcoming economic model. The Real Losses per Service Connection per Day for
CY2019 was 40.11 gal/connection/day.
As part of the City's water system Capital Improvement Program (CIP), a program has been developed
and scheduling is in place to retrofit old distribution pipelines on an annual basis. The City maintains an
emergency response program that aggressively repairs main breaks, hydrant leaks or breaks, and meter
leaks. A team of the City's staff are available to permanently repair main or hydrant breaks, and promptly
restore water service. Both proactive and "inform and response" approaches are used for addressing
water meter leaks when next day service is performed.
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MWDOC helps member agencies evaluate and reduce their distribution systems' real and apparent
losses through comprehensive Water Loss Control Programs. In October 2015, the MWDOC Board of
Directors authorized staff to begin implementing a Water Loss Control Technical Assistance Program
(TAP) to support member agency compliance with Senate Bills 1420 and 555, both of which address
distribution system Water Loss. The TAP program established a menu of technical assistance that water
retailers can elect to participate in. These programs connect water retailers with industry experts who
provide one on one technical assistance through data analysis, agency specific advising and assessment.
The City has utilized the following TAP services:
• Water Balance Compilation
• Component Analysis of Real and Apparent Losses
• Source/Production Meter Accuracy Testing
• Internal Water Loss Committee Planning
In 2019, the MWDOC Board authorized the implementation of a Water Loss Control Shared Services
Business Plan (Business Plan). The City has utilized the following include:
• Water Balance Validation
• Distribution System Leak Detection
• Suspected Leak Investigations
Working through this program, more than 172 miles of distribution system leak detection has been
completed which resulted in discovery of 88 hidden leaks that have been located and repaired,
approximately half the leaks discovered were at the water meter or found on the customer side of the
water meter. As needed and randomly selected water meter accuracy tests have been completed,
improving agency knowledge of meter performance and accuracy of water balance results.
9.1.6 Water Conservation Program Coordination and Staffing Support
The City staff works closely with the Water Use Efficiency staff of MWDOC to provide successful
execution of regional programs, and those conducted on behalf of the City. The City may either directly
participate in or be represented by MWDOC in regional workgroups including the Water Use Efficiency
Workgroup, Public Affairs Workgroup, County of Orange Supervisor's Water Task Force, and the Orange
County Water Use Efficiency Steering Committee. In addition, the City Municipal Code Enforcement
Officer serves to educate the public and enforce the Water Conservation Management Plan
9.1.7 Other Demand Management Measures
9.1 .7.1 Residential Program
MWDOC assists the City with the implementation of residential DMMs by making available the following
programs aimed at increasing landscape and indoor water use efficiency for residential customers.
High Efficiency Clothes Washer Rebate Program
The High Efficiency Clothes Washer (HECW) Rebate Program provides residential customers with
rebates for purchasing and installing HECWs that. Approximately 15% of home water use goes
towards laundry, and HECWs use 35-50% less water than standard washer models, with savings of
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approximately 10,500 gallons per year, per device. Devices must meet or exceed the Consortium for
Energy Efficiency (CEE) Tier 1 Standard, and a listing of qualified products can be found at
ocwaters mart.cc m. There is a maximum of one rebate per home.
Premium High Efficiency Toilet Rebate Program
The largest amount of water used inside a home, 30%, goes toward flushing the toilet. The Premium High
Efficiency Toilet (HET) Rebate Program offers incentives to residential customers for replacing their toilets
using 1.6 gallons per flush (gpf) or more. Premium HETs use just 1.1 gpf, which is 20% less water than
WaterSense standard toilets. In addition, Premium HETS save an average of 9 gallons of water per day
while maintaining high performance standards.
9.1 .7.2 CII Programs
MWDOC provides a variety of financial incentives to help City businesses, restaurants, institutions, hotels,
hospitals, industrial facilities, and public sector sites achieve their efficiency goals. Water users in these
sectors have options to choose from a standardized list of water efficient equipment/devices or may
complete customized projects through a pay-for-performance where the incentive is proportional to the
amount of water saved. Such projects include high efficiency commercial equipment installation and
manufacturing process improvements.
Water Savings Incentive Program
The Water Savings Incentive Program (WSIP) is designed for non-residential customers to improve their
water efficiency through upgraded equipment or services that do not qualify for standard rebates.
WSIP is unique because it provides an incentive based on the amount of water customers actually save.
This "pay-for-performance" design lets customers implement custom projects for their sites.
Projects must save at least 10 MG of water to qualify for the Program and are offered from $195 to
$390 per acre foot of water saved. Examples of successfully projects include but are not limited to
changing industrial process system water, capturing condensation, and using it to supplement cooling
tower supply, and replacing water-using equipment with more efficient products.
On-site Retrofit Program
The On-site Retrofit Program (ORP) provides another pay-for-performance financial incentive to
commercial, industrial, and institutional property owners, including Homeowner Associations (HOAs), who
convert potable water irrigation or industrial water systems to recycled water use.
Projects commonly include the conversion of mixed or dedicated irrigation meters using potable water to
irrigate with reclaimed water, or convert industrial processes use to recycled water, such as a cooling
towers. Financial incentives of up to $1,300 per AF of potable water saved are available for customer-side
on the meter retrofits. Funding is provided by MET, USBR, and DWR.
Multi-Family Premium High Efficiency Toilet Incentive Program
MWDOC makes an effort to reach all water-users in Orange County. For the Multi-Family Premium
HET Rebate Program, MWDOC targets multi-family buildings in both disadvantaged communities (DAC)
and non-DAC communities, in addition to targeting all commercial buildings, and SF residential homes
through Premium HET device rebates.
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MWDOC offers the DAC Multi-Family HET Program, a special version of the HET Program, to ensure
regardless of economic status all water-users in Orange County can benefit from the rebate.
This Program targets 3.5 gpf or greater toilets to replace them with WaterSense Labeled 1.1 gpf or less.
For this purpose, DAC are referenced as communities facing economic hardship. This is defined using
criteria established by DWR and the County of Orange, which includes communities where the MHI is
less than 85% of the Orange County MHI.
The DAC Multi-Family Program is contractor-driven, where a contractor works with building owners to
replace all of the toilets in the building(s). To avoid any cost to tenants, the rebate is $200 per toilet paid
to the contractor, essentially covering the contractor's cost; therefore, there is little to no charge to the
building owners that may be passed through to tenants. This process was formed after consulting
contractors and multi-family building owners in Orange County. To serve those in multi-family buildings
outside of designated DAC locations, MWDOC offers $75 per toilet through the same contractor-driven
format. An additional option is available through SoCalWater$mart, which offers up to $250 per toilet to
multi-family buildings that were built before 1994, therefore targeting buildings built before legislation
required low-flow plumbing fixtures in new construction.
Device Retrofits
MWDOC offers additional financial incentives under the Socal Water$mart Rebate Program which offers
rebates for various water efficient devices to CII customers. Core funding is provided by MET and
supplemental funding is sourced from MWDOC via grant funds and/or retail water agencies.
9.1 .7.3 Landscape Programs
One of the most active and exciting water use efficiency sectors MWDOC provides services for are those
programs that target the reduction of outdoor water use. With close to 60% of water consumed outdoors,
this sector has been and will continue to be a focus for MWDOC and the City.
Turf Removal Program
The Orange County Turf Removal Program offers incentives to remove turf grass from residential,
commercial, and public properties throughout the County. This program is a partnership between
MWDOC, MET, and local retail water agencies. The goals of this program are to increase water use
efficiency through sustainable landscaping practices that result in multi-benefit projects across Orange
County. Participants replace their turf grass with drought-tolerant, CA Friendly, or CA Native landscaping,
and retrofit their irrigation systems to high efficiency equipment, such as drip, or remove it entirely, and
are encouraged to utilize smart irrigation timers. Furthermore, projects are required to include a
stormwater capture feature, such as a rain garden or dry stream bed, and have a minimum of three plants
per 100 square feet to increase plant density and promote healthy soils. These projects save water and
also reduce dry and wet weather runoff, increase urban biomass, and sequester more carbon than turf
landscapes.
Landscape Design and Maintenance Plan Assistance Programs
To maximize the water efficiency and quality of Orange County's Turf Removal Program Projects,
MWDOC offers free landscape designs and free landscape maintenance plans to participating residential
customers. The Landscape Design Assistance Program is offered at the beginning stages of their turf
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removal project so that customers may receive a customized, professionally designed landscape to
replace their turf. Landscape designs include plant selection, layout, irrigation plans, and a stormwater
capture feature. These designs help ensure climate appropriate plants are chosen and planted by
hydrozone, that appropriate high efficiency irrigation is properly utilized, that water savings are maximized
as a result of the transformation. Landscape maintenance plans are offered after a project is complete to
ensure that the new landscape is cared for properly and water savings are maximized.
Smart Timer Rebate Program
Smart Timers are irrigation clocks that are either weather-based irrigation controllers (WBICs) or soil
moisture sensor systems. WBICs adjust automatically to reflect changes in local weather and site-specific
landscape needs, such as soil type, slopes, and plant material. When WBICs are programmed properly,
turf and plants receive the proper amount of water throughout the year. During the fall months, when
property owners and landscape professionals often overwater, Smart Timers can save significant
amounts of water.
Rotating Nozzles Rebate Program
The Rotating Nozzle Rebate Program provides incentives to residential and commercial properties for the
replacement of high-precipitation rate spray nozzles with low-precipitation rate multi-stream,
multi-trajectory rotating nozzles. The rebate offered through this Program aims to offset the cost of the
device and installation.
Spray-to-Drip Rebate Program
The Spray to Drip Rebate Program offers residential, commercial, and public agency customers rebates
for converting areas irrigated by traditional high-precipitation rate spray heads to low-precipitation rate
drip irrigation. Drip irrigation systems are extremely water-efficient. Rather than spraying wide areas
subject to wind drift, overspray and runoff, drip systems use point emitters to deliver water to specific
locations at or near plant root zones. Water drips slowly from the emitters either onto the soil surface or
below ground. As a result, less water is lost to wind, evaporation, and overspray, saving water, and
reducing irrigation runoff and non-point source pollution.
Socal Water$mart Rebate Program for Landscape
The City through MWDOC also offers financial incentives under the SoCal Water$mart Rebate Program
for a variety of water efficient landscape devices, such as Central Computer Irrigation Controllers, large
rotary nozzles, and in-stem flow regulators.
Landscape Training Classes
The California Friendly and Native Landscape Training and the Turf Removal and Garden Transformation
Workshops provide education to residential homeowners, property managers, and professional
landscape contractors on a variety of landscape water efficiency practices that they can employ and use
to help design a beautiful garden using California Friendly and native plant landscaping principles.
The California Friendly and Native Landscape Class demonstrates how to: implement storm water
capture features in the landscape; create a living soil sponge that holds water; treat rainwater by a
resource; select and arrange plants to maximize biodiversity and minimize water use; and control
irrigation to minimize water waste, runoff and non-point source pollution.
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The Turf Removal and Garden Transformation Workshop teaches participants how to transform thirsty
turfgrass into a beautiful, climate-appropriate water efficient garden. This class teaches how to: evaluate
the landscape's potential; plan for garden transformation; identify the type of turfgrass in the yard; remove
grass without chemicals; build healthy, living soils; select climate-appropriate plants that minimize water
use and maximize beauty and biodiversity; and implement a maintenance schedule to maintain the
garden.
Qualified Water Efficient Landscape Certification (Commercial)
Since 2018, MWDOC along with the City, has offered free Qualified Water Efficient Landscaper (QWEL)
certification classes designed for landscape professionals. Classes are open to any city staff, professional
landscaper, water district employee, or maintenance personnel that would like to become a Qualified
Water Efficient Landscaper. The QWEL certification program provides 20 hours of instruction on water
efficient areas of expertise such as local water supply, sustainable landscaping, soil types, irrigation
systems and maintenance, as well as irrigation controller scheduling and programing. QWEL has
received recognition from EPA WaterSense for continued promotion of water use efficiency. To earn the
QWEL certification, class participants must demonstrate their ability to perform an irrigation audit as well
as pass the QWEL exam. Successful graduates will be listed as a Certified Professional on the
WaterSense website as well as on MWDOC's landscape resources page, to encourage Turf Removal
participants or those making any landscape improvements to hire a QWEL certified professional.
Started in December 2020, a hybrid version of QWEL is available in conjunction with the California
Landscape Contractors Association's Water Management Certification Program. This joint effort allows
landscape industry an opportunity to obtain two nationally recognized EPA WaterSense Professional
Certifications with one course and one written test. This option is offered through MET.
Orange County Water Smart Gardens Resource Page
MWDOC's Orange County Water Smart Gardens webpage provides a surplus of helpful guides and fact
sheets, as well as an interactive photo gallery of water-saving landscape ideas. The purpose of this
resource is to help Orange County residents find a broad variety of solutions for their water efficient
landscaping needs. This includes a detailed plant database with advanced to search features; photo
and/or video-based garden tours; garden gallery with images organized into helpful landscape categories
such as back yards, hillsides, full sun, and/or shade with detailed plant information; and the ability to
select and store plants in a list that the user can print for use when shopping.
Additional technical resources are available such as a watering calculator calibrated for local
evapotranspiration rates, and a garden resources section with fact sheets on sustainable landscape
fundamentals, water and soil management, composting, solving run-off, and other appropriate topics.
Web page is accessible through mwdoc.com and directly at www.ocwatersmartclardens.com.
9.2 implementation over the Past Five Years
During the past five years, FY 2015-16 to 2020-21, the City, with the assistance of MWDOC, has
continued water use efficiency programs for its residential, CII, and landscape customers as described
below. Implementation data is provided in Appendix I. The City will continue to implement all applicable
programs in the next five years.
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Table 9-2: City of Tustin Water Conservation Efficiency Program Participation
Measure Metric
2015-16 2016-17 2017-18 2018-19 2019-20
Central Computer computer
Irrigation Controllers controllers
Flow Restrictor restrictors - - - - -
He Efficiency Clothes
washers 67 46 51 34 26
Washers
High Efficiency Toilets toilets 203 - 5 4 -
Rain Barrels barrels 181 27 5 5 7
Cisterns cisterns - - - - -
Premium High
toilets 464 194 12 344 40
Efficiency Toilets
Rotating Nozzles nozzles 1,068 95 30 47 55
CII Weather Based
clocks 8 22 1 - -
Irrigation Controllers
Residential Weather
Based Irrigation clocks 37 33 35 41 44
Controllers
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Measure Metric
IM1. i
Zero Water Urinals urinals - - - - -
Plumbing Flow Control valves - - - - -
Soil Moisture Sensor controllers - - - - -
Ice-Making Machine machines - - - - -
Turf Removal sqft 46,906 11,173 16,926 20,083 22,279
Spray-to-Drip sqft - - - 5,066 6,419
Landscacpe Design
Assistance
Water Savings
Incentive Program
On Site Retrofit
sites - - - - -
Program
9.3 Water Use Objectives (Future Requirements)
To support Orange County retailers with SB 606 and AB 1668 compliance (Conservation Framework),
MWDOC is providing multi-level support to members agencies to ensure they meet the primary goals of
the legislation including to Use Water More Wisely and to Eliminate Water Waste. Beginning in 2023,
Urban water suppliers are required to calculate and report their annual urban water use objective (WUO),
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submit validated water audits annually, and to implement and report Best Management Practice (BMP)
CII performance measures.
Urban Water Use Objective
An Urban Water Supplier's urban WUO is based on efficient water use of the following:
• Aggregate estimated efficient indoor residential water use;
• Aggregate estimated efficient outdoor residential water use;
• Aggregate estimated efficient outdoor irrigation landscape areas with dedicated irrigation meters
or equivalent technology in connection with CII water use;
• Aggregate estimated efficient water losses;
• Aggregate estimated water use for variances approved the State Water Board;
• Allowable potable reuse water bonus incentive adjustments.
MWDOC offers a large suite of programs, described in detail throughout Section 1.3.6, that will assist
Orange County retailers in meeting and calculating their WUO.
Table 9-3 describes MWDOC's programs that will assist agencies in meeting their WUO through both
direct measures: programs/activities that result in directly quantifiable water savings; and indirectly:
programs that provide resources promoting water efficiencies to the public that are impactful but not
directly measurable.
Table 9-3: MWDOC Programs to Assist in Meeting WUO
•
Component
Direct Impact Direct Impact
HECW Increase of indoor
Indoor Population and GPCD residential efficiencies
Residential standard HET
Multi-Family HET(DAC/
and reductions of GPCD
non-DAC) use
Direct Impact Direct Impact
Turf Removal Increase outdoor
Spray-to-Dip residential efficiencies
Irrigated/irrigable area Smart Timer and reductions of
Outdoor measurement and a High Efficiency Nozzle gallons per Wof
Residential percent factor of local (HEN) irrigated/irrigable area
ETo Rain Barrels/Cisterns used
Indirect Impact Indirect Impact
Provide information,
resources, and
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•
Component Calculation Program Impact
Landscape Design and education to promote
Maintenance efficiencies in the
Assistance landscape
Orange County Friendly
Gardens Webpage
CA Friendly/Turf
Removal Classes
QWEL
Direct Impact Direct Impact
Turf Removal Increase outdoor
Spray-to-Dip residential efficiencies
Smart Timer and reductions of
HEN gallons per ft2of
Central Computer irrigated/irrigable area
Irrigation Controllers used
Outdoor Irrigated/irrigable area Irri g
Dedicated measurement and a Large Rotary Nozzles Indirect Impact
Irrigation percent factor of local In-Stem Flow Provide information,
Meters ETo Regulators resources, and
Indirect Impact education to promote
efficiencies in the
Orange County Friendly landscape
Gardens Webpage
CA Friendly/Turf
Removal Classes
QWEL
Following the AWWA Direct Impact Direct Impact
M36 Water Audits and Water Balance Identify areas of the
Water Loss Control Validation distribution system that
Water Loss Program, Fourth Customer Meter need repair,
Edition and AWWA Accuracy Testing replacement, or other
Water Audit Software Distribution System action
V5 Pressure Surveys
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• Nr
Component
Distribution System
Leak Detection
No-Discharge
Distribution System
Flushing
Water Audit
Compilation
Component Analysis
One of the following: Direct Impact Direct Impact
• Volume of potable GWRS The GWRS (run by
reuse water from OCWD) significantly
existing facilities,
increases the availability
Bonus
not to exceed 15% of potable reuse water
Incentives of WUO
• Volume of potable
reuse water from
new facilities, not
to exceed 10%of
WUO
In addition, MWDOC is providing support to agencies to assist with the calculation of WUOs. DWR will
provide residential outdoor landscape measurements; however, Urban Water Suppliers are responsible
for measuring landscape that is irrigated/irrigable by dedicated irrigation meters. MWDOC is contracting
for consultant services to assist agencies in obtaining these measurements. Services may include but are
not limited to:
• Accounting/database clean up (e.g., data mining billing software to determine dedicated irrigation
customers);
• Geolocation of dedicated irrigation meters;
• In-field measurements;
• GIS/Aerial imagery measurements;
• Transformation of static/paper maps to digital/GIS maps.
These services will help agencies organize and/or update their databases to determine which accounts
are dedicated irrigation meters and provide landscape area measurements for those accounts.
These data points are integral when calculating the WUO. MWDOC is also exploring funding options to
help reduce retail agencies' costs of obtaining landscape area measurements for dedicated irrigation
meters.
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CII Performance Measures
Urban water supplies are expected to report BMPs and more for CII customers. MWDOC offers a broad
variety of programs and incentives to help CII customers implement BMPs and increase their water
efficiencies.
Table 9-4: CII Performance Measures and Programs
Wcomponent • • Offered
WSIP WSIP incentivizes customized
ORP CII water efficiency projects that
HETs utilize BMPs.
HE Urinals ORP incentivizes the conversion
Plumbing Flow Control Valves of potable to recycled water
Connectionless Food Steamers and is applicable to CII
Air-cooled Ice Machines dedicated irrigation meters or
CII Performance Measures Cooling Tower Conductivity
CII mixed-use meters that may
controllers be split to utilize recycled water
Cooling Tower pH Controllers
for irrigation.
Dry Vacuum Pumps
Laminar Flow Restrictors Additional CII rebates based on
BMPs increase the economic
feasibility of increasing water
efficiencies.
These efforts to assist Orange County retail agencies are only just beginning. Our plan is to ensure that
all agencies are fully ready to begin complying with the new water use efficiency standards framework
called for in SB 606 and SB 1668 by the start date of 2023.
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10 PLAN ADOPTION, SUBMITTAL, AND IMPLEMENTATION
The Water Code requires the UWMP to be adopted by the Supplier's governing body. Before the
adoption of the UWMP, the Supplier has to notify the public and the cities and counties within its service
area per the Water Code and hold a public hearing to receive input from the public on the UWMP.
Post adoption, the Supplier submits the UWMP to DWR and the other key agencies and makes it
available for public review.
This section provides a record of the process the City followed to adopt and implement its UWMP.
Overview
Recognizing that close coordination among other relevant public agencies is key to the success of its
UWMP, the City worked closely with many other entities, including representation from diverse social,
cultural, and economic elements of the population within the City's service area, to develop and update
this planning document. The City also encouraged public involvement through its public hearing process,
which provided residents with an opportunity to learn and ask questions about their water supply
management and reliability. Through the public hearing, the public has an opportunity to comment and
put forward any suggestions for revisions of the Plan.
Table 10-1 summarizes external coordination and outreach activities carried out by the City and their
corresponding dates. The UWMP checklist to confirm compliance with the Water Code is provided in
Appendix A.
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Table 10-1: External Coordination and Outreach
External Coordination a • Outreach im Date
Notified the cities and counties within the Supplier's service area
that Supplier is preparing an updated UWMP (at least 60 days 3/4/2021 Appendix K
prior to public hearing)
Public Hearing Notice 5/13/2021 and Appendix K
5/20/2021
Held Public Hearing 6/1/2021 Appendix K
Adopted UWMP 6/1/2021 Appendix L
Submitted UWMP to DWR (no later than 30 days after adoption) 7/1/2021 -
Submitted UWMP to the California State Library(no later than 7/1/2021 -
30 days after adoption)
Submitted UWMP to the cities and counties within the 7/1/2021 -
Supplier's service area (no later than 30 days after adoption)
Made UWMP available for public review (no later than 30 days 7/31/2021 -
after filing with DWR)
This UWMP was adopted by the City Council on June 1, 2021. A copy of the adopted resolution is
provided in Appendix L.
10.2 Agency Coordination
The Water Code requires the Suppliers preparing UWMPs to notify any city or county within their service
area at least 60 days prior to the public hearing. As shown in Table 10-2, the City sent a Letter of
Notification to the County of Orange and the City of Santa Ana on March 4, 2021 to state that it was in the
process of preparing an updated UWMP (Appendix K).
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Table 10-2: Retail: Notification to Cities and Counties
SubmittalDWR •l ail: Notification to Cities
kg_qd Counties
City Name 60 Day Notice Notice of Public
Hearing
Santa Ana ❑� ❑�
County Name 60 Day Notice Notice of Public
Hearing
Orange County ❑W ❑�
The City's water supply planning relates to the policies, rules, and regulations of its regional and local
water providers. The City is dependent on imported water from MET through MWDOC and EOCWD, its
wholesale supplier. The City is also dependent on groundwater from OCWD, the agency that manages
the OC Basin. As such, the City involved the relevant agencies in this 2020 UWMP at various levels of
contribution as described below. MWDOC provided assistance to the City's 2020 UWMP development by
providing much of the data and analysis such as population projections from the California State
University at Fullerton CDR and the information quantifying water availability to meet the City's projected
demands for the next 25 years, in five-year increments. Additionally, MWDOC led the effort to develop a
Model Water Shortage Ordinance that its retail suppliers can adopt as is or customize and adopt as part
of developing their WSCPs. This 2020 UWMP was developed in collaboration with MWDOC's 2020
UWMP to ensure consistency between the two documents.
As the wholesale supplier, EOCWD provides imported potable water received from MWDOC to the City to
help facilitate water supply to the City's service area. This 2020 UWMP was developed in conjunction with
the EOCWD's 2020 UWMP.
As a groundwater producer who relies on supplies from the OCWD-managed OC Basin, the City
coordinated the preparation of this 2020 UWMP with OCWD. Several OCWD documents, such as the
Groundwater Reliability Plan, Engineer's Report, and 2017 Basin 8-1 Alternative were used to retrieve the
required relevant information, including the projections of the amount of groundwater the City is allowed
to extract in the 25-year planning horizon.
The various planning documents of the key agencies that were used to develop this UWMP are listed in
Section 2.2.1.
10.3 Public Participation
The City encouraged community and public interest involvement in the plan update through a public
hearing and inspection of the draft document on June 1, 2021. As part of the public hearing, the City
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discussed adoption of the UWMP, SBx7-7 baseline values, compliance with the water use targets
(Section 5), implementation, and economic impacts of the water use targets (Section 9).
Copies of the draft plan were available at the City Clerk's and Utilities Department offices.
Legal public notices for the meeting were published in the local newspaper and posted at City facilities.
A copy of the published Notice of Public Hearing is included in Appendix K.
The hearing was conducted during a regularly scheduled meeting of the City Council.
- UWMP Submitta
The City Council reviewed and approved the 2020 UWMP at its June 1, 2021 meeting after the public
hearing. See Appendix L for the resolution approving the Plan.
By July 1, 2021, the City's adopted 2020 UWMP was filed with DWR, California State Library, the County
of Orange, and the City of Santa Ana. The submission to DWR was done electronically through the online
submittal tool—WUE Data Portal. The City will make the Plan available for public review on its website no
later than 30 days after filing with DWR.
10.5 Amending the Adopted UWMP or WSCF
Based on DWR's review of the UWMP, the City will make any amendments in its adopted UWMP, as
required and directed by DWR and will follow each of the steps for notification, public hearing, adoption,
and submittal for the amending the adopted UWMP.
If the City revises its WSCP after UWMP is approved by DWR, then an electronic copy of the revised
WSCP will be submitted to DWR within 30 days of its adoption.
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11 REFERENCES
California Department of Housing and Community Development. (2020).Accessory Dwelling Units
(ADUs) and Junior Accessory Dwelling Units (JADUs). https://www.hcd.ca..qov/policy-
research/accessorydwellingun its.shtml
California Department of Water Resources (DWR). (2020a, January). California's Most Significant
Droughts: Comparing Historical and Recent Conditions. https://water.ca.gov/-/media/DWR-
Website/Web-Pages/What-We-Do/Droug ht-Mitigation/Files/Publications-And-
Reoorts/a6022 CalSiaDrouahtsl9 v9 av11.pdf. Accessed on October 12, 2020.
California Department of Water Resources (DWR). (2020b, August 26). The Final State Water Project
Delivery Capability Report(DCR) 2019. https:Hdata.cnra.ca.gov/dataset/state-water-prolect-
delivery-capability-report-dcr-2019. Accessed on December 28, 2020.
California Department of Water Resources (DWR). (2020c, August). Draft Urban Water Management
Plan Guidebook 2020. https://water.ca.gov/-/media/DWR-Website/Web-Pages/Programs/Water-
Use-And-Efficiency/Urban-Water-Use-Efficiency/Urban-Water-Management-Plans/Draft-2020-
UWMP-Guidebook.pdf?la=en&hash=266FE747760481ACF779FOF2AAEE615314693456.
Accessed on December 28, 2020.
CDM Smith. (2021, March 30). Orange County Water Demand Forecast for MWDOC and OCWD
Technical Memorandum.
City of La Habra, Irvine Ranch Water District, & Orange County Water District. (2017, January 1). Basin
8-1 Alternative. https://www.ocwd.com/media/4918/basin-8-l-alternative-final-report-1.pdf.
Accessed on December 29, 2020.
City of Tustin. General Plan. November 2018.
City of Tustin. Water Master Plan. March 2000.
City of Tustin. (2015). Urban Water Management Plan. https://www.tustinca.orq/Archive/ViewFile/Item/61
Accessed March 2, 2021.
Metropolitan Water District of Southern California (MET). (2021, June). 2020 Urban Water
Management Plan.
Orange County Local Agency Formation Commission (OC LAFCO). (2020, September). Municipal
Service Review for the Municipal Water District of Orange County.
Orange County Water District. (2021). 2019-2020 Engineer's Report on the Groundwater Conditions,
Water Supply and Basin Utilization in the Orange County Water District.
Orange County Water District. (2020, February). 2018-2019 Engineer's Report on the Groundwater
Conditions, Water Supply and Basin Utilization in the Orange County Water District.
https://www.ocwd.com/media/8791/2018-19-engineers-report-final.pdf. Accessed on December
30, 2020.
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Santa Margarita Water District (SMWD). (2021). San Juan Watershed Project. About the Project:Phases.
http://sanouanwatershed.corn/about-the-r)romect/eir/phases/. Accessed on April 20, 2021.
The Metropolitan Water District Act. (1969).
http://www.mwdh2o.com/Who%2OWe%2OAre%20%2OFact%2OSheets/1.2 Metropolitan Act.pdf
United States Department of the Interior Bureau of Reclamation (USBR). (2012, December). Colorado
River Basin Water Supply and Demand Study: Study Report.
https://www.usbr.qov/lc/region/programs/crbstudv/finalreport/Studv%20Report/CRBS Study Rep
ort FINAL.0 . Accessed on December 29, 2020.
University of California Berkeley. (2020). About Accessory Dwelling Units. https://www.aducalifornia.org/.
Accessed on December 9, 2020.
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APPENDICES
Appendix A. UWMP Water Code Checklist
Appendix B. DWR Standardized Tables
Appendix C. Reduced Delta Reliance
Appendix D. SBx7-7 Verification and Compliance Forms
Appendix E. 2021 OC Water Demand Forecast for MWDOC and OCWD
Technical Memorandum
Appendix F. AWWA Water Loss Audits
Appendix G. G1 —Amended Main San Gabriel Judgement
G2 —2017 Basin 8-1 Alternative
Appendix H. Water Shortage Contingency Plan
Appendix I. Water Use Efficiency Implementation Report
Appendix J. Demand Management Measures
Appendix K. Notice of Public Hearing
Appendix L. Adopted UWMP Resolution
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ATTACHMENT 2
Resolution No. 21-36
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RESOLUTION NO. 21-36
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF TUSTIN,
CALIFORNIA ADOPTING THE CITY OF TUSTIN 2020 URBAN
WATER MANAGEMENT PLAN PURSUANT TO CALIFORNIA WATER
CODE SECTIONS 10610 THROUGH 10657
WHEREAS, the waters of the State of California are a limited yet renewable resource
subject to ever-increasing demands statewide; and
WHEREAS, the conservation and efficient use of urban water supplies are of
statewide concern; however, the planning for that use and the implementation of those plans
can best be accomplished at the local level; and
WHEREAS, a long-term, reliable supply of water is essential and urban water
management plans are required to effectuate the efficient use of available supplies; and
WHEREAS, the City of Tustin has completed a 2020 update to its 2015 Urban Water
Management Plan pursuant to the requirements of the Urban Water Management Planning
Act of 1983 as prescribed by AB-797; and
WHEREAS, the 2020 Plan is a local resource information document and
complements other regional water planning documents, including the Municipal Water
District of Orange County and the East Orange County Water District 2020 Urban Water
Management Plans; and
WHEREAS, the purpose of the City's 2020 Plan is to provide an analysis of the
current and alternative water demands, supplies, conservation activities and water
shortage contingency planning for the City; and
WHEREAS, the 2020 Plan will be updated no less than every five years to reflect
changes in local water supply trends, resource management reliability planning and
conservation policies within the boundaries of the City.
NOW, THEREFORE, BE IT HEREBY RESOLVED that the City Council of the City of
Tustin adopts the 2020 Urban Water Management Plan and orders the Plan to be filed with
the State of California Department of Water Resources.
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PASSED AND ADOPTED at a regular meeting of the Tustin City Council on the 1st
day of June 2021 .
LETITIA CLARK,
Mayor
ATTEST:
ERICA N. YASUDA,
City Clerk
STATE OF CALIFORNIA )
COUNTY OF ORANGE ) SS
CITY OF TUSTIN )
I, Erica N. Yasuda, City Clerk and ex-officio Clerk of the City Council of the City of
Tustin, California, do hereby certify that the whole number of the members of the City
Council is five; that the above and foregoing Resolution No. 21-36 was duly and
regularly passed and adopted at a regular meeting of the City Council held on the 1st
day of June 2021 by the following vote:
COUNCILMEMBER AYES:
COUNCILMEMBER NOES:
COUNCILMEMBER ABSTAINED:
COUNCILMEMBER ABSENT:
ERICA N. YASUDA,
City Clerk