HomeMy WebLinkAbout13 2022 PUBLIC HEALTH GOAL REPORTDocuSign Envelope ID: F31 D1 073-2A1 C -44F6-9616-191 E7AF1 8364
• Agenda Item 13
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AGENDA REPORT Reviewed:DS
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City Manager
Finance Director N/A
MEETING DATE: JULY 19, 2022
TO: MATTHEW S. WEST, CITY MANAGER
FROM: DOUGLAS S. STACK, DIRECTOR OF PUBLIC WORKS/CITY ENGINEER
SUBJECT: 2022 PUBLIC HEALTH GOAL REPORT
SUMMARY
The California Health and Safety Code requires public water systems serving more than 10,000
service connections to prepare a Public Health Goal (PHG) report every three years and conduct a
public hearing to provide information to consumers on levels of contaminants in the City's drinking
water. For the 2019-2021 reporting period, the City's drinking water quality compiled with all
California Division of Drinking Water (DDW) and United States Environmental Protection Agency
(USEPA) drinking water standards. Although PHGs are recommended targets and not enforceable
standards, the City's water system exceeded the PHGs for arsenic, bromate, gross alpha and beta
particle activity, perchlorate, and uranium. It is important to note, all water samples that reported
above the PHGs, also reported below the state and federal maximum contaminant levels (MCL), and
the City's water system remains in full compliance with all state and federal water quality standards.
RECOMMENDATION
It is recommended that the City Council:
1. Conduct a public hearing to receive comments and input related to the 2022 Public Health
Goal Report.
2. At the conclusion of the public hearing, approve the 2022 Public Health Goal Report.
FISCAL IMPACT
Sufficient funding was appropriated in the Water Division Operating Budget to complete this report.
CORRELATION TO THE STRATEGIC PLAN
Approval of the 2022 Public Health Goal Report contributes to the fulfillment of the City's Strategic
Plan Goal D: Foster strong community and regional relationships. Specifically, the action implements
Strategy 1, which among other things, is to strengthen community engagement with all sectors.
BACKGROUND
Provisions of the California Health and Safety Code, Section 116470(b), require public water systems
serving more than 10,000 service connections to prepare a brief, written report (in plain language)
containing information on the detection of any contaminants above the Public Health Goals (PHGs)
published by the State Office of Environmental Health Hazard Assessment (OEHHA). The report
must also list the detection of any contaminants above the Maximum Contaminant Level Goals
(MCLGs) set by the United States Environmental Protection Agency (USEPA) for all other
contaminants until such a time that OEHHA has published PHG's for those contaminants.
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2022 Public Health Goal Report
July 19, 2022
Page 2
The PHGs and MCI -Gs are the levels of contaminant in drinking water that pose no significant risk
if consumed over a lifetime. The process of establishing a PHG is a risk assessment based strictly
on human health considerations. PHGs and MCI -Gs are recommended targets and are not
enforceable standards. During the 2019-2021 reporting period, the City water system exceeded the
PHGs for arsenic, bromate, gross alpha and beta particle activity, perchlorate and uranium. All other
water quality monitoring results are less than the state PHG or federal MCLG. The City's water
system remains in compliance with all regulatory water quality standards.
The drinking water quality of the City of Tustin Water Services meet all DDW and USEPA drinking
water standards set to protect public health. The 2022 Public Health Goal Report is available for
review on the City's website and once approved by the City Council, no further action is required
by the City.
,$. Stack, P.E.
of Public Works/City Engineer
Attachment(s):
1. 2022 Public Health Goal Report
2. Annual Water Quality Reports for 2019, 2020, 2021
DocuSign Envelope ID: F31 D1 073-2A1 C -44F6-9616-191 E7AF1 8364
ATTACHMENT 1
2022 Public Health Goal Report
DocuSign Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
05 : �0.:Mwo =0UJI N
Remembering what connects us.
CITY OF TUSTIN
2022 PUBLIC HEALTH GOALS REPORT
JUNE 2022
861 Village Oaks Drive, Suite 100 • Covina, California 91724
Phone: (626) 967-6202 • Fax: (626) 331-7065 • Website: www.stetsonengineers.com
Northern California Southern California Arizona Colorado Oregon
STETSON
ENGINEERS INC.
DocuSign Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
2022 Public Health Goals (PHGs) Report
City of Tustin
1.0 Introduction
Under the Calderon -Sher Safe Drinking Water Act of 1996 public water systems in
California serving greater than 10,000 service connections must prepare a report
containing information on 1) detection of any contaminant in drinking water at a level
exceeding a Public Health Goal (PHG), 2) estimate of costs to remove detected
contaminants to below the PHG using Best Available Technology (BAT), and 3) health
risks for each contaminant exceeding a PHG. This report must be made available to
the public every three years. The initial report was due on July 1, 1998, and
subsequent reports are due every three years thereafter.
This 2022 report has been prepared to address the requirements set forth in Section
116470 of the California Health and Safety Code. It is based on water quality analyses
during calendar years 2019, 2020, and 2021 or, if certain analyses were not performed
during those years, the most recent data available was reported. The 2022 report has
been designed to be as informative as possible, without unnecessary duplication of
information contained in the Consumer Confidence Reports, which are mailed to
customers by July 1St of each year.
There are no regulations explaining requirements for the preparation of PHGs reports.
A workgroup of the Association of California Water Agencies (ACWA) Water Quality
Committee has prepared suggested guidelines for water utilities to use in preparing
PHGs reports. The ACWA guidelines were used in the preparation of this report.
These guidelines include tables of cost estimates for BAT. The State of California
(State) provides ACWA with numerical health risks and category of health risk
information for contaminants with PHGs. This health risk information is appended to the
ACWA guidelines.
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2.0 California Drinking Water Regulatory Process
California Health and Safety Code Section 116365 requires the State to develop a PHG
for every contaminant with a primary drinking water standard or for any contaminant the
State is proposing to regulate with a primary drinking water standard. A PHG is the
level of a contaminant in drinking water that poses no significant health risk if consumed
for a lifetime. The process of establishing a PHG is a risk assessment based strictly on
human health considerations. PHGs are recommended targets and are not required to
be met by any public water system.
The State office designated to develop PHGs is the California Environmental Protection
Agency's Office of Environmental Health Hazard Assessment (OEHHA). The PHG is
then forwarded to the State Water Resources Control Board, Division of Drinking Water
(DDW) for use in revising or developing a Maximum Contaminant Level (MCL) in
drinking water. The MCL is the highest level of a contaminant that is allowed in drinking
water. California MCLs cannot be less stringent than federal MCLs and must be as
close as is technically and economically feasible to the PHGs. DDW is required to take
treatment technologies and cost of compliance into account when setting an MCL.
Each MCL is reviewed at least once every five years.
Two radiological contaminants (gross alpha particle and gross beta particle) have MCLs
but do not yet have designated PHGs. For these contaminants, the Maximum
Contaminant Level Goal (MCLG), the federal U.S. Environmental Protection Agency
(USEPA) equivalent of PHGs, is used in the 2022 PHGs Report.
3.0 Identification of Contaminants
Section 116470(b)(1) of the Health and Safety Code requires public water systems
serving more than 10,000 service connections to identify each contaminant detected in
drinking water that exceeded the applicable PHG. Section 116470(f) requires the
MCLG to be used for comparison if there is no applicable PHG.
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The City of Tustin (City) water system has approximately 14,108 service connections.
The following constituents were detected at one or more locations within the drinking
water system at levels that exceeded the applicable PHGs or MCLGs:
• Arsenic — naturally -occurring in the local groundwater
• Bromate — formed when naturally -occurring bromide reacts with ozone during
the disinfection process in surface water purchased from Metropolitan Water
District of Southern California (MWDSC)
• Gross alpha particle activity (gross alpha) — naturally -occurring in the local
groundwater and surface water purchased from MWDSC
• Gross beta particle activity (gross beta) — naturally -occurring in the surface
water purchased from MWDSC; not required to be tested in groundwater
• Perchlorate — industrial contamination in the local groundwater
• Uranium — naturally -occurring in the local groundwater and surface water
purchased from MWDSC.
The accompanying chart shows the applicable PHG or MCLG and MCL for each
contaminant identified above. The chart includes the maximum, minimum, and average
concentrations of each contaminant in drinking water supplied by the City in calendar
years 2019 through 2021.
4.0 Numerical Public Health Risks
Section 116470(b)(2) of the Health and Safety Code requires disclosure of the
numerical public health risk, determined by OEHHA, associated with the MCLs, PHGs,
and MCLGs. Available numerical health risks developed by OEHHA for the
contaminants identified above are shown on the accompany chart. Only numerical risks
associated with cancer-causing chemicals have been quantified by OEHHA.
Arsenic — OEHHA has determined the theoretical health risk associated with the PHG
is 1 excess case of cancer in a million people. USEPA has determined the risk
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associated with the MCL is 2.5 excess cases of cancer in 1,000 people exposed over a
70 -year lifetime
Bromate — OEHHA has determined the theoretical health risk associated with the PHG
is 1 excess case of cancer in a million people. USEPA has determined the risk
associated with the MCL is 1 excess case of cancer in 10,000 people exposed over a
70 -year lifetime.
Gross Alpha — OEHHA has not established a PHG. USEPA has established an MCLG
of 0. USEPA has determined the risk associated with the MCL is 1 excess case of
cancer in 1,000 people over a lifetime exposure.
Gross Beta — OEHHA has not established a PHG. USEPA has established an MCLG
of 0. USEPA has determined the risk associated with the MCL is 2 excess cases of
cancer in 1,000 people over a lifetime exposure.
Perchlorate — OEHHA has not established a numerical health risk for perchlorate
because PHGs for non -carcinogenic chemicals in drinking water are set at a
concentration at which no known or anticipated adverse health risks will occur, with an
adequate margin of safety.
Uranium — OEHHA has determined that the theoretical health risk associated with the
PHG is 1 excess case of cancer in a million people. USEPA has determined the risk
associated with the MCL is 5 excess cases of cancer in 100,000 people exposed over a
70 -year lifetime.
5.0 Identification of Risk Categories
Section 116470(b)(3) of the Health and Safety Code requires identification of the
category of risk to public health associated with exposure to the contaminant in drinking
water, including a brief, plainly worded description of those terms. The risk categories
City of Tustin 4 2022 PHGs Report
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and definitions for the contaminants identified above are shown on the accompanying
chart.
6.0 Description of Best Available Technology
Section 116470(b)(4) of the Health and Safety Code requires a description of the best
available technology, if any is available on a commercial basis, to remove or reduce the
concentrations of the contaminants identified above. The BATs are shown on the
accompanying chart.
7.0 Costs of Using Best Available Technologies and Intended Actions
Section 116470(b)(5) of the Health and Safety Code requires an estimate of the
aggregate cost and cost per customer of utilizing the BATs identified to reduce the
concentration of a contaminant to a level at or below the PHG or MCLG. In addition,
Section 116470(b)(6) requires a brief description of any actions the water purveyor
intends to take to reduce the concentration of the contaminant and the basis for that
decision.
The City operates two existing treatment facilities (Main Street Treatment Plant and
17th Street Desalter) that treat nitrate and perchlorate in groundwater from four wells,
using ion exchange and reverse osmosis.
Arsenic — The BATs for removal of arsenic in water for large water systems are:
activated alumina, coagulation/filtration, electrodialysis, ion exchange, lime softening,
oxidation/filtration, and reverse osmosis. Arsenic was detected above the PHG in the
local groundwater (one well). The City is in compliance with the MCL for arsenic. The
estimated cost to reduce arsenic levels in local groundwater to below the PHG of 0.004
microgram per liter (pg/1) using ion exchange was calculated. Because the DDW
detection limit for purposes of reporting (DLR) for arsenic is 2 pg/I, treating arsenic to
below the PHG level means treating arsenic to below the DLR of 2 pg/l. There are
City of Tustin 5 2022 PHGs Report
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numerous factors that may influence the actual cost of reducing arsenic levels to the
PHG. Achieving the water quality goal for arsenic could be approximately $285,000 per
year, or $20 per household per year.
Bromate — The BATs for removal of bromate in water for large water systems are:
coagulation/filtration optimization, granular activated carbon, and reverse osmosis.
Bromate was detected above the PHG in water supplied by MWDSC. The City is in
compliance with the MCL for bromate. The estimated cost to reduce bromate levels in
MWDSC water to below the PHG of 0.1 pg/I using reverse osmosis was calculated.
Because the DDW DLR for bromate is 1 pg/l, treating bromate to below the PHG level
means treating bromate to below the DLR of 1 pg/I. There are numerous factors that
may influence the actual cost of reducing bromate levels to the PHG. Achieving the
water quality goal for bromate could range from approximately $580,000 to $4,990,000
per year, or between $41 and $354 per household per year.
Perchlorate — The BATs for removal of perchlorate in water are: ion exchange and
biological fluidized bed reactor. Perchlorate was detected above the PHG in the local
groundwater (one well). The City is in compliance with the MCL for perchlorate. The
estimated cost to reduce perchlorate levels in local groundwater to below the PHG of 1
pg/I using ion exchange was calculated. Because the DLR for perchlorate is 2 pg/I,
treating perchlorate to below the PHG level means treating perchlorate to below the
DLR of 2 pg/I. There are numerous factors that may influence the actual cost of
reducing perchlorate levels to the PHG. Achieving the water quality goal for perchlorate
could range from $71,000 to $155,000 per year, or between $5 and $11 per household
per year.
Gross Alpha, Gross Beta, and Uranium — The only BAT for the removal of gross
alpha in water for large water systems is reverse osmosis, which can also remove gross
beta, and uranium, if detected. Gross alpha was detected above the MCLG in the local
groundwater (one well; excluding the 17th Street Well 4 and Newport Well 3 water
which is currently processed by the reverse osmosis system at the 17th Street Desalter)
City of Tustin 6 2022 PHGs Report
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and surface water purchased from MWDSC. Gross beta was detected above the
MCLG in the surface water purchased from MWDSC. Uranium was detected above the
PHG in the local groundwater (four wells) and surface water purchased from MWDSC.
The cost of providing treatment using reverse osmosis to reduce gross alpha levels in
local groundwater and in MWDSC surface water to the MCLG of 0 picoCurie per liter
(pCi/1) (and consequently gross beta in the MWDSC surface water below the MCLG;
and uranium in the local groundwater and MWDSC surface water below the PHG) was
calculated. Because the DLR for gross alpha is 3 pCi/I, treating gross alpha to 0 pCi/I
means treating it to below the DLR of 3 pCi/I. Achieving the water quality goal for gross
alpha could range from $1,630,000 to $13,900,000 per year, or between $115 and $985
per household per year.
All Contaminants — In addition, a cost estimate to treat all water produced or
purchased by the City using ion exchange and reverse osmosis to remove all the
contaminants detected above the PHGs or MCLGs was calculated (excluding the 17th
Street Well 4 and Newport Well 3 water which is currently processed by the reverse
osmosis system at the 17th Street Desalter). All the contaminants listed in the
accompanying chart may be removed to non-detectable levels by ion exchange and
reverse osmosis. As shown on the accompanying chart, achieving the water quality
goals for all contaminants using ion exchange and reverse osmosis could range from
$1,700,000 to $14,100,000 per year, or between $120 and $996 per household per
year.
For additional information, please contact Mr. Michael Grisso at (714) 361-4719, or
write to the City of Tustin Water Services, 300 Centennial Way, Tustin, California
90780.
J:\2471\2471-004 Tustin 2022 PHG\Tustin 2022 PHG text Final.docx
City of Tustin 7 2022 PHGs Report
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ATTACHMENT 2
Annual Water Quality Reports for 2019, 2020, 2021
DocuSign Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
2019
Water
Quality
Report
TUSTIN
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x�moar
BUILDING OUR FUTURE
HONORING OUR PAST
City Of
Tustin
Water
Services
This report reflects
water quality testing
conducted during 2018.
of
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DocuSign Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
Your 2019 Since 1990, California public water
utilities have been providing an
Water annual Water Quality Report to their
Quality customers. This year's report covers
calendar year 2018 drinking water
Report quality testing and reporting.
The City of Tustin Water Services
Division (City) vigilantly safeguards its water supply and, as
in years past, the water delivered to your home meets the
quality standards required by federal and state regulatory
agencies. The U.S. Environmental Protection Agency
(USEPA) and the State
Water Resources Control
Board, Division of Drinking
Water (DDW) are the
agencies responsible for
establishing and enforcing
drinking water quality
standards.
In some cases, the City goes beyond what is required by
testing for unregulated chemicals that may have known
health risks but do not have drinking water standards. For
example, the Orange County Water District (OCWD),
which manages the groundwater basin, and the
Metropolitan Water District of Southern California
(MWDSC), which supplies imported treated surface water
to the City, test for unregulated chemicals in our water
supply. Unregulated chemical monitoring helps USEPA and
DDW determine where certain chemicals occur and whether
new standards need to be established for those chemicals.
Through drinking water quality testing programs carried
out by OCWD for groundwater, MWDSC for treated surface
water and the City for the
distribution system, your
drinking water is constantly
monitored from source to tap
for regulated and unregulated
constituents. The State allows
us to monitor for some
/ contaminants less than once per
year because the concentrations
of these contaminants do not change frequently.
Some of our data, though representative, are more than
one year old.
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DocuSign Envelope ID: F31 D1 073-2A1 C -44F6-9616-191 E7AF1 8364
Federal and State Water Quality Regulations
Water Quality Issues that Could Affect Your Health
Drinking Water Fluoridation
Fluoride has been added to U.S. drinking water
supplies since 1945. Of the 50 largest cities in the U.S.,
43 fluoridate their drinking water. In December 2007,
MWDSC joined a majority of
the nation's public water
suppliers in adding fluoride t
drinking water in order to
prevent tooth decay. In line
with recommendations from
the DDW, as well as the U.S.
Centers for Disease Control
and Prevention, MWDSC
adjusted the natural
fluoride level in imported treated water from the
Colorado River and State Water Project to the
optimal range for dental health of 0.6 to 1.2 parts per
million. Our local water is not supplemented with
fluoride. Fluoride levels in drinking water are limited
under California state regulations at a maximum -
dosage of 2 parts per million. -
Additional information about the fluoridation of
drinking water is available on these websites:
U.S. Centers for
Disease Control and Prevention
1(800)232-4636 • www.cdc.gov/fluoridation/
State Water Resources Control Board,
Division of Drinking Water
www.waterboards.ca.gov/drinking_water/
certlic/drinkingwater/Fluoridation.html
For more information about MWDSC's fluoridation
program, please call Edgar G. Dymally at (213) 217-5709
or email him at edymally@mwdh2o.com.
Nitrate Advisory
At times, nitrate in your tap water may have
exceeded one-half the MCL, but it was never greater
than the MCL of 10 milligrams per liter (mg/L). Nitrate
in your drinking water in 2018 ranged from non -detect to
7.5 mg/L. The following advisory is issued because in
2018 we recorded nitrate measurements in the
drinking water supply which exceeded one-half the
nitrate MCL.
Nitrate in drinking water at levels above 10 mg/L is
a health risk for infants of less than six months of age.
What are Water Quality Standards?
Drinking water standards established by USEPA and DDW set
limits for substances that may affect consumer health or aesthetic
qualities of drinking water. The chart in this report shows the
following types of water quality standards:
• Maximum Contaminant Level (MCL): The highest level of a
contaminant that is allowed in drinking water. Primary MCLS
are set as close to the PHGs (or MCLGs) as is economically and
technologically feasible.
• Maximum Residual Disinfectant Level (MRDL): The highest level of
a disinfectant allowed in drinking water. There is convincing
evidence that addition of a disinfectant is necessary for control
of microbial contaminants.
• Secondary MCLS: Set to protect the odor, taste, and appearance
of drinking water.
• Primary Drinking Water Standard: MCLS for contaminants that
affect health along with their monitoring and reporting
requirements and water treatment requirements.
• Regulatory Action Level (AL): The concentration of a
contaminant, which, if exceeded, triggers treatment or other
requirements that a water system must follow.
How are Contaminants Measured?
Water is sampled and tested throughout the year. Contaminants
are measured in:
• parts per million (ppm) or milligrams per liter (mg/L)
• parts per billion (ppb) or micrograms per liter (Ng/L)
• parts per trillion (ppt) or nanograms per liter (ng/L)
What is a Water Quality Goal?
In addition to mandatory water quality standards, USEPA and
DDW have set voluntary water quality goals for some contami-
nants. Water quality goals are often set at such low levels that
they are not achievable in practice and are not directly
measurable. Nevertheless, these goals provide useful guideposts
and direction for water management practices. The chart in this
report includes three types of water quality goals:
Maximum Contaminant Level Goal (MCLG): The level of a
contaminant in drinking water below which there is no known or
expected risk to health. MCLGs are set by USEPA.
• Maximum Residual Disinfectant Level Goal (MRDLG): The level of
a drinking water disinfectant below which there is no known or
expected risk to health. MRDLGs do not reflect the benefits of
the use of disinfectants to control microbial contaminants.
• Public Health Goal (PHG): The level of a contaminant in drinking
water below which there is no known or expected risk to health.
PII are set by the California Environmental Protection Agency.
Radiologicals - Tested in 2017 and 2018
Alpha Radiation (pCi/L) 15 (0) <3 ND ND -3.9 No Erosion of Natural Deposits
Uranium (pCi/L) 20 0.43 1.1 ND ND- 2.64 No Erosion of Natural Deposits
Inorganic Chemicals - Tested in 2018
Aluminum (ppm)
1
0.6
ND
0.124
ND -0.31
No
Treatment Process Residue, Natural Deposits
Arsenic (ppb)
10
0.004
<2
ND
ND -2
No
Erosion of Natural Deposits
Bromate (ppb)
10
0.1
NR
2
ND - 4.7
No
Byproduct of Drinking Water Disinfection
Fluoride (ppm)
2
1
0.18
NR
0.14-0.23
No
Erosion of Natural Deposits
Fluoride (ppm) treatment-related
2
1
NR
0.7
0.6-0.9
No
Water Additive for Dental Health
Nitrate (ppm as N)
10
10
4
ND
ND - 7.5
No
Fertilizers, Septic Tanks
Nitrate+Nitrite (ppm as N)
10
10
4
ND
ND- 7.5
No
Fertilizers, Septic Tanks
Selenium (ppb)
50
30
<5
ND
ND- 5.1
No
Treatment Process Residue, Natural Deposits
Secondary Standards* -Tested in 2018
Aluminum (ppb)
200*
600
ND
124
ND -130
No
Treatment Process Residue, Natural Deposits
Chloride (ppm)
500*
n/a
109
94
24-228
No
Runoff or Leaching from Natural Deposits
Color (color units)
15*
n/a
ND
ND
ND -1
No
Naturally -occurring Organic Materials
Iron (ppb)
300*
n/a
<100
ND
ND- 246
No
Runoff or Leaching from Natural Deposits
Odor (threshold odor number)
3*
n/a
ND
2
1-4
No
Naturally -occurring Organic Materials
Specific Conductance (pmho/cm)
1,600*
n/a
1,020
906
491-1,680
No
Substances that Form Ions in Water
Sulfate (ppm)
500*
n/a
140
199
63-226
No
Runoff or Leaching from Natural Deposits
Total Dissolved Solids (ppm)
1,000*
n/a
516
565
156-896
No
Runoff or Leaching from Natural Deposits
Turbidity (NTU)
5*
n/a
0.14
ND
ND -1.2
No
Erosion of Natural Deposits
Unregulated Chemicals - Tested in 2014 and 2018
Alkalinity, total as CaCO3 (ppm)
Not Regulated
n/a
192
106
99-272
n/a
Runoff or Leaching from Natural Deposits
Boron (ppm)
NL= 1
n/a
<0.1
0.13
ND -0.21
n/a
Runoff or Leaching from Natural Deposits
Calcium (ppm)
Not Regulated
nla
98
58
34.5-166
n/a
Runoff or Leaching from Natural Deposits
Chromium,Total (ppb)**
50
(100)
nla
0.5
0.5
n/a
Erosion of Natural Deposits; Industrial Discharge
Germanium (ppb)
Not Regulated
nla
ND
0.1
ND -0.4
n/a
Erosion of Natural Deposits; Industrial Discharge
Hardness, total as CaCO3 (ppm)
Not Regulated
n/a
349
240
110-627
n/a
Runoff or Leaching from Natural Deposits
Hardness, total (grains/gallon)
Not Regulated
nla
20
14
6-37
n/a
Runoff or Leaching from Natural Deposits
Magnesium (ppm)
Not Regulated
n/a
25.3
23
5.4-51.6
n/a
Runoff or Leaching from Natural Deposits
Manganese (ppb)***
50*
nla
ND
1.9
ND- 2.7
n/a
Erosion of Natural Deposits
Molybdenum, Total (ppb)
Not Regulated
n/a
nla
5
5
n/a
Erosion of Natural Deposits
pH (pH units)
Not Regulated
nla
7.8
8.1
7.4-8.1
n/a
Hydrogen Ion Concentration
Potassium (ppm)
Not Regulated
n/a
2.3
4.4
1.6-4.8
n/a
Runoff or Leaching from Natural Deposits
Sodium (ppm)
Not Regulated
n/a
77
92
50- 125
n/a
Runoff or Leaching from Natural Deposits
Strontium, Total (ppb)
Not Regulated
n/a
nla
1,070
1,070
n/a
Erosion of Natural Deposits
Total Organic Carbon (ppm)
TT
n/a
0.14
2.4
ND- 2.7
n/a
Various Natural and Man-made Sources
Vanadium, Total (ppb)
NL=50
n/a
nla
2.3
2.3
n/a
Erosion of Natural Deposits
ppb = parts -per -billion; ppm = parts -per -million; pCi/L= picoCuries per liter; NTU = nephelometric turbidity units; pmho/cm = micromhos per centimeter;
NR = Not Required to be analyzed; ND = not detected; <= average is less than the detection limit for reporting purposes; MCL = Maximum Contaminant Level;
(MCLG) = federal MCL Goal; PHG = California Public Health Goal; NL= Notification Level; n/a = not applicable; TT =treatment technique *Contaminant is regulated by a secondary standard
**Total chromium is regulated with an MCL of 50 ppb but was not detected, based on the detection limit for purposes of reporting of 10 ppb.
Total chromium was included as part of the unregulated chemicals requiring monitoring.
***Manganese is regulated with a secondary standard of 50 ppb but was not detected, based on the detection limit for purposes of reporting of 20 ppb.
Manganese was included as pan of the unregulated chemicals requiring monitoring.
1) Highest single turbidity measurement 0.3 NTU 0.07 No Soil run-off
2) Percentage of samples less than 03 NTU 95% 100% No Soil run-off
Turbidity is a measure of the cloudiness of the water, an indication of particulate matter, some of which might include harmful microorganisms.
Low turbidity in Metropolitan's treated water is a good indicator of effective filtration. Filtration is called a "treatment technique" (TT).
A treatment technique is a required process intended to reduce the level of contaminants in drinking water that are difficult and sometimes impossible to measure directly.
DocuSign Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
Such nitrate levels in drinking water can interfere with the
capacity of the infant's blood to carry oxygen, resulting in
a serious illness; symptoms include shortness of breath
and blueness of the skin. Nitrate levels above 10 mg/L
may also affect the ability of the blood to carry oxygen in
other individuals, such as pregnant women and those
with certain specific enzyme deficiencies. If you are
caring for an infant, or you are pregnant, you should ask
advice from your health care provider.
Want Additional Information?
About Lead in Tap Water
If present, elevated levels of lead can
cause serious health problems,
especially for pregnant women and
young children. Lead in drinking water is
primarily from materials and compo-
nents associated with service lines and
home plumbing. The City is responsible for providing high
There's a wealth of information on the internet about Drinking Water Quality and water issues in general,
especially the drought and conservation. Some good sites to begin your own research are:
City of Tustin: www.TustinCA.org
Municipal Water District of Orange County:
www.mwdoc.org
U.S. Environmental Protection Agency:
www.epa.gov/safewater
California Department of Water Resources:
www.water.ca.gov
Metropolitan Water District of So. California
www.mwdh2o.com
Drought and Water Conservation Tips
www.BeWaterWise.com
www.SaveOurWater.com
Rebate Information, Water Saving Resources:
www.00WaterSmart.com
Total Trihalomethanes (ppb) 80 24 ND — 29 No Byproducts of Chlorine Disinfection
Haloacetic Acids (ppb) 60 5 ND —6.3 No Byproducts of Chlorine Disinfection
Chlorine Residual (ppm) (4/4) 1.1 0.6-1.7 No Disinfectant Added for Treatment
Aesthetic Quality
Turbidity (NTU) 5` 0.13 0.01-0.38 No Erosion of Natural Deposits
Eight locations in the distribution system are tested quarterly for total trihalomethanes and haloacetic acids;
twenty locations are tested monthly for color, odor and turbidity. Color and odor were not detected in 2018
MRDL — Maximum Residual Disinfectant Level; MRDLG = Maximum Residual Disinfectant Level Goal
'Contaminant is regulated by a secondary standard to maintain aesthetic qualities (taste, odor, color).
Lead (ppb) 15 0.2 5.4 1/ 53 No Corrosion of Household Plumbing
Copper (ppm) 1.3 0.3 0.2 0/53 No Corrosion of Household Plumbing
During 2018, 53 residences were tested for lead and copper at -the -tap.
Lead was detected in seven samples; one exceeded the regulatory action level. Copper was detected in 45 homes; none exceeded the regulatory action level.
A regulatory action level is the concentration of a contaminant which triggers treatment or other requirements that a water system mustfollow.
In 2018, no school submitted a request to be sampled for lead.
The City's water system had a water quality
Monitoring & Reporting (M & R) violation during
the 2018 calendar year. Although this incident
was not an emergency and had no impact on
public health, as our customers, you have the
right to know what happened and what we
did to correct the situation.
We are required to monitor your drinking
water for specific contaminants on a regular
basis. Results of regular monitoring are an
indicator of whether or not our drinking water
meets health standards. During the second
quarter of 2018, we did not complete all
monitoring for the disinfection byproducts total
trihalomethanes and five haloacetic acids
(T-FHM/HAAS) and therefore cannot be sure
of the quality of your water during that time.
What happened? What is being done?
The City is required to collect quarterly samples for TTHM/HAAS monitoring
throughout 8 designated sites within the water system. On June 5, 2018, the City
collected 7 of the 8 required samples. City staff accidently omitted one sample site
that was offline during the sampling date.
Upon review of the laboratory results, the missing site was identified and
scheduled for sampling. A sample from the 8th site was collected, analyzed and
reported on June 21, 2018. Staff responsible for collecting water quality samples
have since reviewed and been trained on the City's water quality monitoring
requirements and scheduling.
For more information, please contact Mike Grisso, Water Services Manager at
(714) 361-4719.
Please share this information with all others who drink this water, especially
those who may not have received this notice directly (for example, people in
apartments, nursing homes, schools, and businesses). You can do this by posting
this notice in a public place or distributing copies by hand or mail.
quality drinking water, but cannot control
the variety of materials used in plumbing
components.
When your water has been sitting for
several hours, you can minimize the
potential for lead exposure by flushing
your tap for 30 seconds to 2 minutes
before using water for drinking or cooking.
If you are concerned about lead in your water, you
may wish to have your water tested. Information on
lead in drinking water, testing methods, and steps you
can take to minimize exposure is available from the
Safe Drinking Water Hotline at (800) 426-4791, or on
the web at www.epa.gov/safewater/lead.
Entrained Air
If your tap water has a slightly "milky" appearance,
you're probably experiencing an interesting but
harmless phenomenon known as "entrained air."
The milky color in the water caused by tiny air
bubbles is harmless and is related to the operation of
City wells.
The air is dissolved under pressure in the ground-
water, much like carbon dioxide in a bottle of soda. If
your tap water is milky -colored and you want to
confirm you are experiencing entrained air, rinse out a
clear glass twice and then fill it with cold tap water.
After a few moments, the water should begin to clear
from the bottom of the glass to the top as the bubbles
rise to the surface. If the water does not clear, please
contact us.
Source Water Assessments
Imported (MWDSC) Water Assessment
Every five years, MWDSC is required by DOW to examine
possible sources of drinking water contamination in its State
Water Project and Colorado River source waters.
The most recent watershed sanitary surveys of its source
water supplies from the Colorado River was updated in 2015 and
the State Water Project was updated in 2016.
Water from the Colorado River is considered to be most
vulnerable to contamination from recreation, urban/stormwater
runoff, increasing urbanization in the watershed, and wastewater.
Water supplies from Northern California's State Water Project
are most vulnerable to contamination from urban/stormwater
runoff, wildlife, agriculture, recreation, and wastewater.
USEPA also requires MWDSC to complete one Source Water
Assessment (SWA) that utilizes information collected in the
watershed sanitary surveys. MWDSC completed its SWA in
December 2002. The SWA is used to evaluate the vulnerability
of water sources to contamination and helps determine whether
more protective measures are needed.
A copy of the most recent summary of either Watershed
Sanitary Survey or the SWA can be obtained by calling MWDSC
at (800) CALL -MWD (225-5693).
Groundwater Assessment
An assessment of the drinking water sources for the City
was completed in December 2002. The groundwater sources
are considered most vulnerable to the following activities not
associated with detected contaminants: confirmed leaking
underground storage tanks, dry cleaners, and gas stations.
The groundwater sources are considered most vulnerable to
the following activities associated with contaminants
detected in the water supply: known contaminant plumes,
historic agricultural activities and application of fertilizers,
and sewer collection systems.
A copy of the complete assessment is available at State
Water Resources Control Board, Division of Drinking Water,
2 MacArthur Place, Suite 150, Santa Ana, California 92707.
You may request a summary of the assessment by contact-
ing the City of Tustin Water Services at (714) 361-4719.
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DocuSign Envelope ID: F31 D1073 -2A1 C -44F6-9616-191 E7AF18364
2020
Water
Quality
ww Report
TUSTIN
5
Bu cDING OUR FUTURE
HONORING OUR PAST
City of
Tustin
Water Services
Isis
I
DocuSian Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
Since 1990, California public water
utilities have been providing an
annual Water Quality Report to
their customers. This year's report
covers calendar year 2019
drinking water quality testing
and reporting.
The City of Tustin Water Services Division (City)
vigilantly safeguards its water supply and, as in years past,
the water delivered to your home meets the quality
standards required by federal and state regulatory agencies.
The U.S. Environmental Protection Agency (USEPA) and the
State Water Resources
Control Board, Division of
Drinking Water (DDW) are
the agencies responsible
for establishing and
enforcing drinking water
quality standards.
In some cases, the City goes beyond what is required by
testing for unregulated chemicals that may have known
health risks but do not have drinking water standards. For
example, the Orange County Water District (OCWD),
which manages the groundwater basin, and the
Metropolitan Water District of Southern California
(MWDSC), which supplies imported treated surface water
to the City, test for unregulated chemicals in our water
supply. Unregulated chemical monitoring helps USEPA and
DDW determine where certain chemicals occur and whether
new standards need to be established for those chemicals.
Through drinking water quality testing programs carried
out by OCWD for groundwater,
MW DSC for treated surface water
and the City for the distribution
system, your drinking water is
constantly monitored from source to
tap for regulated and unregulated
constituents. The State allows us to
monitor for some contaminants less
than once per year because the concentrations of these
contaminants do not change frequently.
Some of our data, though representative, are more than
one year old.
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DocuSign Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
Federal and State Water Quality Regulations
Water Quality Issues that Could Affect Your Health
Drinking Water Fluoridation U.S. Centers for Total Coliform Rule
Fluoride has been added to U.S. drinking water Disease Control and Prevention This Consumer Confidence
supplies since 1945. Of the 50 largest cities in the U.S., 1(800)232-4636 • www.cdc.gov/fluoridation/ Report (CCR) reflects changes
43 fluoridate their drinking water. In December 2007, in drinking water regulatory
MWDSC joined a majority of the nation's public water State Water Resources Control Board,
Division of Drink'tn Water requirements instituted during
suppliers in adding
t
5
2016. All water systems are
fluoride to drinking water
www.waterboards.ca.gov/drinking water/
required to comply with the
in order to prevent tooth
certlic/drinkingwater/Fluoridation.html
state Total Coliform Rule.
decay. MWDSC was in
compliance with all
For more information about MWDSC's fluoridation
Effective April 1, 2016, all water systems are also
provisions of the State's
program, please call Edgar G. Dymally at (213) 217-5709
required to comply with the federal Revised Total
fluoridation system
or email him at edymally@mwdh2o.com.
Coliform Rule.
0
requlremen s. ur
local water is not supplemented with fluoride.
Fluoride levels in drinking water are limited under
California state regulations at a maximum dosage of
2 parts per million.
Additional information about the fluoridation of Radiologicals -Tested in 2017 and 2018
drinking water Is available on these websites: Alpha Radiation (pCi/L) 15 (0) <3 ND ND -3.9 No Erosion of Natural Deposits
Uranium (pCi/L) 20 0.43 1.33 ND ND -2.64 No Erosion of Natural Deposits
Inorganic Contaminants - Tested in 2019
Aluminum (ppm) 1 0.6 ND 0.124 ND -0.065 No Treatment Process Residue, Natural Deposits
What are Water Quality Standards? Arsenic (ppb) 10 0.004 <2 ND ND -2 No Erosion of Natural Deposits
Drinking water standards established by USEPA and DDW set Bromate (ppb) 10 0.1 NR 2 ND- 5.9 No Byproduct of Drinking Water Ozonation
limits for substances that may affect consumer health or aesthetic Fluoride (ppm) 2 1 0.18 NR 0.14-0.23 No Erosion of Natural Deposits
qualities of drinking water. The chart in this report shows the Fluoride (ppm) treatment-related 2 1 NR 0.7 0.1- 0.9 No Water Additive for Dental Health
following types of water quality standards:
Nitrate (ppm as N) 10 10 3.8 0.5 0.5-7.3 No Fertilizers, Septic Tanks
• Maximum Contaminant Level (MCL): The highest level of a Nitrate+Nitrite (ppm as N) 10 10 3.8 0.5 0.5-7.3 No Fertilizers, Septic Tanks
contaminant that is allowed in drinking water. Primary MCLS Selenium (ppb) 50 30 <5 ND ND- 5.1 No Treatment Process Residue, Natural Deposits
are set as close to the PHGs (or MCLGs) as is economically and
technologically feasible. Secondary Standards* -Tested in 2019
• Maximum Residual Disinfectant Level (MRDL): The highest level of Aluminum (ppb) 200* 600 ND 124 ND -65 No Treatment Process Residue, Natural Deposits
a disinfectant allowed in drinking water. There is convincing Chloride (ppm) 500* n/a 101 56 24-228 No Runoff or Leaching from Natural Deposits
evidence that addition of a disinfectant is necessary for control Color (color units) 15* n/a ND ND ND -1 No Naturally -occurring Organic Materials
of microbial contaminants. Odor (threshold odor number) 3* n/a ND ND ND -1 No Naturally -occurring Organic Materials
Secondary MCLs: Set to protect the odor, taste, and appearance Specific Conductance (pmho/cm) 1,600* n/a 1,000 514 491-1,890 No Substances that Form Ions in Water
of drinking water. Sulfate (ppm) 500* n/a 133 91 63-226 No Runoff or Leaching from Natural Deposits
Primary Drinking Water Standard: MCLS for contaminants that Total Dissolved Solids (ppm) 1,000* n/a 454 304 194-614 No Runoff or Leaching from Natural Deposits
affect health along with their monitoring and reporting Turbidity (NTU) 5* n/a 0.16 ND ND -1.2 No Erosion of Natural Deposits
requirements and water treatment requirements. Unregulated Contaminants -Tested in 2019
Regulatory Action Level (AL): The concentration of a Alkalinity, total as CaCO3 (ppm) Not Regulated n/a 184 72 69-258 n/a Runoff or Leaching from Natural Deposits
contaminant, which, if exceeded, triggers treatment or other Boron (ppm) NL=1 n/a 0.11 0.12 ND -0.21 n/a Runoff or Leaching from Natural Deposits
requirements that a water system must follow. Bromide (ppm) Not Regulated n/a 0.28 NR 0.083-0.68 n/a Industrial Discharge
How are Contaminants Measured? Calcium (ppm) Not Regulated n/a 89 30 29-166 n/a Runoff or Leaching from Natural Deposits
Water is sampled and tested throughout the year. Contaminants Germanium (ppb) Not Regulated n/a ND 0.1 ND -0.4 n/a Erosion of Natural Deposits; Industrial Discharge
are measured in: Hardness, total as CaCO3 (ppm) Not Regulated n/a 312 127 110-612 n/a Runoff or Leaching from Natural Deposits
• parts per million (ppm) or milligrams per liter (mg/L) Hardness, total (grains/gallon) Not Regulated n/a 18 7.4 6.4-36 n/a Runoff or Leaching from Natural Deposits
• parts per billion (ppb) or micrograms per liter (ug/L) Magnesium (ppm) Not Regulated n/a 21.9 14 5.4-47.7 n/a Runoff or Leaching from Natural Deposits
Manganese (ppb)** 50* n/a 0.63 1.9 ND- 2.7 n/a Erosion of Natural Deposits
• parts per trillion (ppt) or nanograms per liter (ng/L) pH (pH units) Not Regulated n/a 7.9 8.4 7.6-8.5 n/a Hydrogen Ion Concentration
What is a Water Quality Goal? Perfluorohexar icAcid (ppt) Not Regulated n/a NR 2.3 2.2-2.3 n/a Industrial Discharge
In addition to mandatory water quality standards, USEPA and Potassium (ppm) Not Regulated n/a 2.3 2.8 1.6-3.1 n/a Runoff or Leaching from Natural Deposits
DDW have set voluntary water quality goals for some contami- Sodium (ppm) Not Regulated ri 79.2 56 50-125 n/a Runoff or Leaching from Natural Deposits
nants, Water quality goals are often set at such low levels that Total Organic Carbon (ppm) TT n/a <0.3 2.4 ND- 2.6 n/a Various Natural and Man-made Sources
they are not achievable in practice and are not directly Total Organic Carbon (ppm)*** Not Regulated n/a 0.3 NR 0.12-0.6 n/a Various Natural and Man-made Sources
measurable. Nevertheless, these goals provide useful guideposts
and direction for water management practices. The chart in this
report includes three types of water quality goals:
• Maximum Contaminant Level Goal (MCLG): The level of a
contaminant in drinking water below which there is no known or
expected risk to health. MCLGs are set by USEPA.
• Maximum Residual Disinfectant Level Goal (MRDLG): The level of
a drinking water disinfectant below which there is no known or
expected risk to health. MRDLGs do not reflect the benefits of
the use of disinfectants to control microbial contaminants.
• Public Health Goal (PHG): The level of a contaminant in drinking
water below which there is no known or expected risk to health.
PHGs are set by the California Environmental Protection Agency.
ppb = parts -per -billion; ppm = parts -per -million; pCi/L = picoCuries per liter; NTU =nephelometric turbidity units; pmho/cm = micromhos per centimeter;
NR = Not Required to be analyzed; ND = not detected; <= average is less than the detection limit for reporting purposes; MCL = Maximum Contaminant Level;
(MCLG) = federal MCL Goal; PHG = California Public Health Goal; NL = Notification Level; n/a = not applicable; TT = treatment technique
*Contaminant is regulated by a secondary standard.
**Manganese is regulated with a secondary standard of 50 ppb but was not detected, based on the detection limit for purposes of reporting of 20 ppb.
Manganese was included aspart of the unregulated contaminants requiring monitoring.
***Total organic carbon was also included as part of the unregulated contaminants requiring monitoring.
1) Highest single turbidity measurement 0.3 NTU 0.05 No Soil run-off
2) Percentage of samples less than 0.3 NTU 95% 100% No Soil run-off
Turbidity is a measure of the cloudiness of the water, an indication of particulate matter, some of which might include harmful microorganisms.
Low turbidity in Metropolitan's treated water is a good indicator of effective filtration. Filtration is called a "treatment technique" (TT).
A treatment technique is a required process intended to reduce the level of contaminants in drinking water that are difficult and sometimes impossible to measure directly
DocuSign Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
The new federal rule protects public health
by ensuring the integrity of the drinking water
distribution system by monitoring for the
presence of microbials (i.e., total coliform and
E. coli bacteria).
The USEPA anticipates greater public health
protection as the new rule requires water
systems that are vulnerable to microbial
contamination to identify and resolve potential
Issues.
Water systems that exceed a specified frequency of
total coliform occurrences are required to conduct an
assessment to determine if any sanitary defects exist.
If found, these must be corrected by the water system.
About Lead in Tap Water
If present, elevated levels of lead can cause serious
health problems, especially for pregnant women and
young children. Lead in drinking water is primarily from
materials and components associa-
ted with service lines and home
plumbing. The City is responsible for
providing high quality drinking water,
but cannot control the variety of
materials used in plumbing
components.
When your water has been sitting
for several hours, you can minimize
the potential for lead exposure by
flushing your tap for 30 seconds to 2 minutes before
using water for drinking or cooking.
If you are concerned about lead in your water, you
may wish to have your water tested. Information on lead
in drinking water, testing methods, and steps you can
take to minimize exposure is available from the Safe
Drinking Water Hotline at (800) 426-4791, or on the
web at www.epa.gov/safewater/lead.
Want Additional Information?
There's a wealth of information on the internet about Drinking Water Quality and water issues in general,
especially the drought and conservation. Some good sites to begin your own research are:
City of Tustin: www.TustinCA.org
Municipal Water District of Orange County:
www.mwdoc.org
U.S. Environmental Protection Agency:
www.epa.gov/safewater
California Department of Water Resources:
www.water.ca.gov
Metropolitan Water District of So. California:
www.mwdh2o.com
Drought and Water Conservation Tips:
www.BeWaterWise.com
www.SaveOurWater.com
Rebate Information, Water Saving Resources:
www.00WaterSmart.com
Total Trihalomethanes (ppb) 80 18 ND -25 No Byproducts of Chlorine Disinfection
Haloacetic Acids (ppb) 60 4 ND -6.7 No Byproducts of Chlorine Disinfection
Chlorine Residual (ppm) (4/4) 0.83 0,68 -1.1 No Disinfectant Added for Treatment
Aesthetic Quality
Turbidity (NTU) 5* 0.15 ND -1.2 No Erosion of Natural Deposits
Eight locations in the distribution system are tested quarterly for total trihalomethanes and haloacetic acids;
twenty locations are tested monthly for color, odor and turbidity. Color and odor were not detected in 2019.
MRDL = Maximum Residual Disinfectant Level; MRDLG = Maximum Residual Disinfectant Level Goal;
'Contaminant is regulated by a secondary standard to maintain aesthetic qualities (taste, odor, color).
Total Coliform Bacteria 5% 0 1°/ No Naturally present in the environment
No more than 5% of the monthly samples may be positive for total coliform bacteria.
The occurrence of 2 consecutive total coliform positive samples, one of which contains fecal coliform/E.coli, constitutes an acute MCL violation.
Lead (ppb) 15 0.2 5.4 1 / 53 No Corrosion of Household Plumbing
Copper (ppm) 1.3 0.3 0.2 0/53 No Corrosion of Household Plumbing
During 2018, 53 residences were tested for lead and copper at -the -tap.
Lead was detected in seven samples; one exceeded the regulatory action level. Copper was detected in 45 homes; none exceeded the regulatory action level.
A regulatory action level is the concentration of a contaminant which triggers treatment or other requirements that a water system mustfollow.
In 2019, no school submitted a request to be sampled for lead.
Bromochloroacetic Acid (ppb)
n/a
n/a
0.93
ND -3.8
2019
BromodichloroaceticAcid (ppb)
n/a
n/a
0.31
ND -1.3
2019
ChlorodibromoaceticAcid (ppb)
n/a
n/a
0.26
ND -0.8
2019
Dibromoacetic Acid (ppb)
n/a
n/a
0.97
ND -2.1
2019
DichloroaceticAcid (ppb)
n/a
MCLG=0
1.1
ND -5.1
2019
MonobromoaceticAcid (ppb)
n/a
n/a
0.13
ND -0.4
2019
TrichloroaceticAcid (ppb)
n/a
MCLG=20
0.26
ND -1.3
2019
Nitrate Advisory
Nitrate in drinking water at levels above 10
milligrams per liter (mg/L) is a health risk for infants
of less than six months of age. Such nitrate levels in
drinking water can interfere with the capacity of the
infant's blood to carry oxygen, resulting in a serious
illness; symptoms include shortness of breath and
blueness of the skin. Nitrate levels above 10 mg/L
may also affect the ability of the blood to carry oxygen
in other individuals, such as pregnant women and
those with certain specific enzyme deficiencies. If you
are caring for an infant, or you are pregnant, you
should ask advice from your health care provider
Entrained Air
If your tap water has a slightly "milky" appearance,
you're probably experiencing an interesting but
harmless phenomenon known as "entrained air."
The milky color in the water caused by tiny air
bubbles is harmless and is related to the operation of
City wells.
The air is dissolved under pressure in the ground-
water, much like carbon dioxide in a bottle of soda. If
your tap water is milky -colored and you want to
confirm you are experiencing entrained air, rinse out a
clear glass twice and then fill it with cold tap water.
After a few moments, the water should begin to clear
from the bottom of the glass to the top as the bubbles
rise to the surface. If the water does not clear, please
contact us.
Source Water Assessments
Imported (MWDSC) Water Assessment
Every five years, MWDSC is required by DDW to examine
possible sources of drinking water contamination in its State
Water Project and Colorado River source waters.
The most recent watershed sanitary surveys of its source
water supplies from the Colorado River was updated in 2015 and
the State Water Project was updated in 2016.
Water from the Colorado River is considered to be most
vulnerable to contamination from recreation, urban/stormwater
runoff, increasing urbanization in the watershed, and wastewater.
Water supplies from Northern California's State Water Project
are most vulnerable to contamination from urban/stormwater
runoff, wildlife, agriculture, recreation, and wastewater.
USEPA also requires MWDSC to complete one Source Water
Assessment (SWA) that utilizes information collected in the
watershed sanitary surveys. MWDSC completed its SWA in
December 2002. The SWA is used to evaluate the vulnerability
of water sources to contamination and helps determine whether
more protective measures are needed.
A copy of the most recent summary of either Watershed
Sanitary Survey or the SWA can be obtained by calling MWDSC
at (800) CALL -MWD (225-5693).
Groundwater Assessment
An assessment of the drinking water sources for the City
was completed in December 2002. The groundwater sources
are considered most vulnerable to the following activities not
associated with detected contaminants: confirmed leaking
underground storage tanks, dry cleaners, and gas stations.
The groundwater sources are considered most vulnerable to
the following activities associated with contaminants
detected in the water supply: known contaminant plumes,
historic agricultural activities and application of fertilizers,
and sewer collection systems.
A copy of the complete assessment is available at State
Water Resources Control Board, Division of Drinking Water,
2 MacArthur Place, Suite 150, Santa Ana, California 92707.
You may request a summary of the assessment by contact-
ing the City of Tustin Water Services at (714) 361-4719.
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DocuSign Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
2021
Water
Quality
Report
TUSTIN
BUILDING OUR FUTURE
HONORINC+ OUR PAST
City of
Tustin
Water Services
This report reflects
water quality testing
conducted during 2020.
40
DocuSign Envelope ID: F3lD1073-2A1C-44F6-9616-191E7AF18364
;fes•
Ince 1990, California public water utilities have been providing an annual
Water Quality Report to their customers. This year's report covers
calendar year 2020 drinking water quality testing and reporting.
The City of Tustin Water Services Division (City) vigilantly safeguards its
water supply and, as in years past, the water delivered to your home meets
the quality standards required by federal and state regulatory agencies. The
U.S. Environmental Protection Agency (USEPA) and the State Water Resources
Control Board, Division of Drinking Water (DDW) are the agencies respon-
sible for establishing and enforcing drinking water quality standards.
In some cases, the City goes beyond what is required by testing for
unregulated chemicals that may have known health risks but do not have drinking water standards. For example, the
Orange County Water District (OCWD), which manages the groundwater basin, and the Metropolitan Water District of
Southern California (MWDSC), which supplies imported treated surface water to the City, test for unregulated
chemicals in our water supply. Unregulated chemical monitoring helps USEPA and DDW determine where certain
chemicals occur and whether new standards
Quality Water is Our Priority
urn the tap and the water flows, as
if by magic. Or so it seems. The
reality is considerably different, however.
Delivering high-quality drinking water to
our customers is a scientific and
engineering feat that requires consider-
able effort and talent to ensure the water
is always there, always safe to drink.
Because tap water is highly regulated by state and federal
laws, water treatment and distribution operators must be
licensed and are required to complete on-the-job training and
technical education before becoming a state certified operator.
Our licensed water professionals have an understanding of a
wide range of subjects, including mathematics, biology,
chemistry, physics, and engineering. Some of the tasks they
complete on a regular basis include:
♦ Operating and maintaining equipment to purify and clarify
water;
♦ Monitoring and inspecting machinery, meters, gauges,
and operating conditions;
♦ Conducting tests and inspections on water and evaluating
the results;
♦ Documenting and reporting test results and system
operations to regulatory agencies; and
♦ Serving our community through customer support,
education, and outreach.
So, the next time you turn on your faucet, think of the skilled
professionals who stand behind every drop.
-2-
need to be established for those chemicals.
Through drinking water quality testing
programs carried out by OCWD for
groundwater, MWDSC for treated surface
water and the City for the distribution system,
your drinking water is constantly monitored
from source to tap for regulated and
unregulated constituents. The State allows us
to monitor for some contaminants less than
once per year because the concentrations of
these contaminants do not change frequently.
Some of our data, though representative,
are more than one year old.
This report contains important information
about your drinking water.
Translate it, or speak with someone
who understands it.
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ServiceCustomer Service Representative,
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Telefono: (714) 573-3382.
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DocuSign Envelope ID: F31 D1 073-2A1 C -44F6-9616-191 E7AF1 8364
Introduction
Through drinking water quality testing programs carried out
by the Orange County Water District (OCWD) for ground-
water, Metropolitan Water District of Southern California
(MWDSC) for treated surface water, and the City of Tustin for
the water distribution system, your drinking water is constantly
monitored from source to tap for constituents that are
regulated and unregulated.
Sources of Supply
The City's water supply is a
blend of local groundwater
wells, and imported water
connections originating from
Northern California and the
Colorado River by MWDSC
via the Municipal Water District of Orange County (MWDOC).
Groundwater comes from a natural underground aquifer that is
replenished with water from the Santa Ana River, local rainfall,
Groundwater Replenishment System (GWRS) recycled water,
and imported water. The groundwater basin, which is managed
by OCWD, is about 350 square miles. It lies beneath north and
central Orange County, from Irvine to the Los Angeles County
border and from Yorba Linda to the Pacific Ocean. More than 19
cities and retail water districts draw from the basin to provide
water to homes and businesses.
Orange County's Water Future
For years, Orange County has enjoyed an abundant,
seemingly endless supply of high-quality water. However, as
water demand continues to
increase statewide, we must be
even more conscientious about
our water supply and maximize
the efficient use of this precious
natural resource.
OCWD implements and
operates new and innovative water management and supply
development programs, including water recycling, wetlands
expansion, recharge facility construction, groundwater cleanup
projects, storage programs, and water education programs for
children through adults. MWDOC offers rebates and incentives
to promote water -use efficiency and provides water education
programs. Both agencies work cooperatively with Orange
County retail water agencies to complete studies to assess
water reliability in Orange County. These efforts are helping to
enhance long-term countywide water reliability and water
quality and a healthy water future for Orange County.
Your local and regional water agencies are committed to
making the necessary investments today in new water
management projects to ensure an abundant and high-quality
water supply for generations to come.
Drinking Water Fluoridation
Fluoride has been added to U.S. drinking water supplies
since 1945. Of the 50 largest cities in the U.S., 43 fluoridate
their drinking water. In December 2007, MWDSC joined a
majority of the nation's public
water suppliers in adding fluoride
to drinking water in order to
prevent tooth decay. MWDSC
was in compliance with all `
provisions of the State's
fluoridation system requirements.
Our local water is not supplemented with fluoride. Fluoride
levels in drinking water are limited under California state
regulations at a maximum dosage of 2 parts per million.
Additional information about the fluoridation of drinking
water is available on these websites:
U.S. Centers for Disease Control and Prevention
1 (800) 232-4636 6 www.cdc.gov/fluoridation/
State Water Resources Control Board,
Division of Drinking Water
www.waterboards.ca.gov/drinking—water/
certlic/drinkingwater/Fluoridation.html
For more information about MWDSC's fluoridation program,
please call Edgar G. Dymally at (213) 217-5709 or email him at
edymally@mwdh2o.com.
Wise Water Use is Good for Us All
♦ Check your sprinkler system for leaks, overspray, and broken
sprinkler heads and repair promptly. This can save countless
gallons each time you water.
♦ Water plants in the early morning. It reduces evaporation
and ensures deeper watering.
♦ Use a broom instead of a hose to clean off sidewalks and drive-
ways. It takes very little time to sweep and the water savings
quickly adds up.
♦ Soak pots and pans instead of letting water run while you scrub
them clean. This both saves water and makes the job easier.
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DocuSign Envelope ID: F31D1073-2A1C-44F6-9616-191E7AF18364
To Safeguard Against Issues that May Affect Your Health
We Comply with All State &Federal Water Quality Regulations
Basic Information About
Drinking Water Contaminants
The sources of drinking water (both tap water and bottled
water) include rivers, lakes, streams, ponds, reservoirs, springs
and wells. As water travels over the surface of land or through
the layers of the ground it dissolves naturally occurring minerals
and, in some cases,
radioactive material, and
can pick up substances
resulting from the
presence of animal and
human activity.
Contaminants that may
be present in source water
include:
♦ Microbial contaminants, such as viruses and bacteria, which
may come from sewage treatment plants, septic systems,
agricultural livestock operations and wildlife.
♦ Radioactive contaminants, which can be naturally occurring
or be the result of oil and gas production or mining activities.
♦ Organic chemical contaminants, including synthetic and
volatile organic chemicals, which are by-products of
industrial processes and petroleum production, and can also
come from gasoline stations, urban stormwater runoff,
agricultural application and septic systems.
Nitrate Advisory
Nitrate in drinking water at levels
above 10 milligrams per liter (mg/L) is
a health risk for infants of less than six
months of age. Such nitrate levels in
drinking water can interfere with the
capacity of the infant's blood to carry
oxygen, resulting in a serious illness;
symptoms include shortness of breath
and blueness of the skin.
Nitrate levels above 10 Mg/ L may
also affect the ability of the blood to carry oxygen in other
individuals, such as pregnant women and those with certain
specific enzyme deficiencies.
♦ Inorganic contaminants, such as
salts and metals, which can be
naturally occurring or result from
urban storm runoff, industrial or
domestic wastewater discharges,
oil and gas production, mining and
farming.
♦ Pesticides and herbicides, which
may come from a variety of sources
such as agriculture, urban stormwater runoff and residential
uses.
In order to ensure that tap water is safe to drink, USEPA and
the DDW prescribe regulations that limit the amount of certain
contaminants in water provided by public water systems.
The U.S. Food and Drug Administration regulations and
California law also establish limits for contaminants in bottled
water that must provide the same protection for public health.
Drinking water, including bottled water, may reasonably be
expected to contain at least small amounts of some
contaminants. The presence of contaminants does not
necessarily indicate that water poses a health risk.
More information about contaminants and potential health
effects can be obtained by calling the USEPA's Safe Drinking
Water Hotline at (800) 426-4791, or online at
www.epa.gov/safewater.
If you are caring for an infant, or you are pregnant, you should
ask advice from your health care provider.
Where Do We Use Water the Most?
Outdoor watering of lawns and gardens makes up
approximately 60% of home water use. By reducing
your outdoor water use — by either cutting back on
irrigation or planting more drought tolerant
landscaping — you can dramatically reduce your
overall water use.
Save the most where you use the most:
Make your outdoor use efficient.
Landscaping: 58%
*Showers & Baths: 8% O Clothes Washers: 9% • Toilets: 11%
*Dishwashers: 1 % O Leaks: 7% 0 Faucets: 6%
Data is representative of average consumption; your water usagemay vary.
DocuSign Envelope ID: F31 D1 073-2A1 C -44F6-9616-191 E7AF1 8364
About Lead in Tap Water
If present, elevated levels of lead can cause
serious health problems, especially for
pregnant women and young children. Lead in
drinking water is primarily from materials and
components associated with service lines and
home plumbing. The City is responsible for
providing high quality drinking water, but
cannot control the variety of materials used in plumbing
components.
When your water has been sitting for several hours, you
can minimize the potential for lead exposure by flushing
your tap for 30 seconds to 2 minutes before using water for
drinking or cooking.
If you are concerned about lead in your water, you may
wish to have your water tested. Information on lead in
drinking water, testing methods, and steps you can take
to minimize exposure is available from the Safe Drinking
Water Hotline at (800) 426-4791, or on the web at
www.epa.gov/safewater/lead.
Immunocompromised People
Some people may be more vulnerable to contaminants
in drinking water than the general population. Immuno-
compromised people, such as those with cancer who are
undergoing chemotherapy, persons who have had organ
transplants, people with HIV/AIDS or other immune system
Chart Legend
disorders, some elderly persons and
infants can be particularly at risk to
infection. These people should seek
advice about drinking water from their
health care providers.
The USEPA and the federal Centers
for Disease Control guidelines on
appropriate means to lessen the risk of
infection by Cryptosporidium and other microbial
contaminants are available from USEPA's Safe Drinking
Water hotline at (800) 426-4791, or on the web at
www.epa.gov/safewater.
Entrained Air
If your tap water has a slightly "milky" appearance,
you're probably experiencing an interesting but harmless
phenomenon known as "entrained air."
The milky color in the water caused by tiny air bubbles
is harmless and is related to the operation of City wells.
The air is dissolved under pressure in the groundwater,
much like carbon dioxide in a bottle of soda. If your tap
water is milky -colored and you want to confirm you are
experiencing entrained air, rinse out a clear glass twice and
then fill it with cold tap water. After a few moments, the
water should begin to clear from the bottom of the glass to
the top as the bubbles rise to the surface. If the water does
not clear, please contact us.
What are Water Quality Standards?
Drinking water standards established by USEPA and DDW set limits for substances
that may affect consumer health or aesthetic qualities of drinking water. The charts
in this report show the following types of water quality standards:
• Maximum Contaminant Level (MCL): The highest level of a contaminant that is
allowed in drinking water. Primary MCLS are set as close to the PHGs (or MCLGs)
as is economically and technologically feasible.
• Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant
allowed in drinking water. There is convincing evidence that addition of a
disinfectant is necessary for control of microbial contaminants.
• Secondary MCLS: Set to protect the odor, taste, and appearance of drinking water.
• Primary Drinking Water Standard: MCLs for contaminants that affect health
along with their monitoring and reporting requirements and water treatment
requirements.
• Regulatory Action Level (AL): The concentration of a contaminant which, if
exceeded, triggers treatment or other requirements that a water system must
follow.
How are Contaminants Measured?
Water is sampled and tested throughout the year. Contaminants are measured in:
• parts per million (ppm) or milligrams per liter (mg/L)
• parts per billion (ppb) or micrograms per liter (pg/L)
• parts per trillion (ppt) or nanograms per liter (ng/L)
What is a Water Quality Goal?
In addition to mandatory water quality standards, USEPA
and DDW have set voluntary water quality goals for
some contaminants. Water quality goals are often set at
such low levels that they are not achievable in practice
and are not directly measurable. Nevertheless, these
goals provide useful guideposts and direction for water
management practices. The charts in this report include
three types of water quality goals:
• Maximum Contaminant Level Goal (MCLG):
The level of a contaminant in drinking water below
which there is no known or expected risk to health.
MCLGs are set by USEPA.
• Maximum Residual Disinfectant Level Goal (MRDLG):
The level of a drinking water disinfectant below which
there is no known or expected risk to health. MRDLGs
do not reflect the benefits of the use of disinfectants to
control microbial contaminants.
• Public Health Goal (PHG): The level of a contaminant
in drinking water below which there is no known or
expected risk to health. PHGs are set by the California
Environmental Protection Agency.
DocuSign Envelope ID: F31 D1 073-2A1 C -44F6-9616-191 E7AF1 8364
Radiologicals -Tested in 2020
Alpha Radiation (pCi/L)
15
(0)
<3
<3
ND - 4.68
No
Erosion of Natural Deposits
Beta Radiation (pCi/L)
50
(0)
NR
<4
ND -7
No
Decay of Natural and Man-made Deposits
Uranium (pCi/L)
20
0.43
1.23
2
ND -3
No
Erosion of Natural Deposits
Inorganic Contaminants -Tested in 2020
Aluminum (ppm)
1
0.6
<0.05
0.137
ND -0.791
No
Treatment Process Residue,
Natural Deposits
Barium (ppm)
1
2
ND
0.107
ND - 0.107
No
Refinery Discharge,
Erosion of Natural Deposits
Bromate (ppb)
10
0.1
NR
1.9
ND - 1.3
No
Byproduct of Drinking Water Ozonation
Fluoride (ppm)
2
1
0.17
NR
0.14-0.21
No
Erosion of Natural Deposits
Fluoride (ppm) treatment-related
2
1
NR
0.7
0.5-0.9
No
Water Additive for Dental Health
Nitrate (ppm as N)
10
10
3.88
ND
ND -7.77
No
Fertilizers, Septic Tanks
Nitrate+Nitrite (ppm as N)
10
10
3.88
ND
ND -7.77
No
Fertilizers, Septic Tanks
Selenium (ppb)
50
30
<5
ND
ND- 5.8
No
Treatment Process Residue,
Natural Deposits
Secondary Standards* -Tested in 2020
Aluminum (ppb)
200*
600
<50
137
ND -791
No
Treatment Process Residue,
Natural Deposits
Chloride (ppm)
500*
n/a
113
94
31.4-236
No
Runoff or Leaching from Natural Deposits
Color (color units)
15*
n/a
ND
1
ND - 1
No
Naturally -occurring Organic Materials
Odor (threshold odor number)
3*
n/a
ND
2
ND -2
No
Naturally -occurring Organic Materials
Specific Conductance (pmho/cm)
1,600*
n/a
1,040
970
567-1,820
No
Substances that Form Ions in Water
Sulfate (ppm)
500*
n/a
147
216
82.4-233
No
Runoff or Leaching from Natural Deposits
Total Dissolved Solids (ppm)
Turbidity (NTU)
1,000*
5*
n/a
n/a
534
0.2
592
ND
61-960
ND- 1.2
No
No
Runoff or Leaching from Natural Deposits
Erosion of Natural Deposits
Unregulated Contaminants - Tested in 2018 and 2020
Alkalinity, total as CaCO3 (ppm)
Not Regulated
n/a
195
118
117-269
n/a
Runoff or Leaching from Natural Deposits
Boron (ppm)
NL = 1
n/a
0.11
0.13
ND - 0.2
n/a
Runoff or Leaching from Natural Deposits
Bromide (ppm)
Not Regulated
n/a
0.26
NR
0.083-0.68
n/a
Industrial Discharge
Calcium (ppm)
Not Regulated
n/a
105
66
42.6-175
n/a
Runoff or Leaching from Natural Deposits
Germanium (ppb)
Not Regulated
n/a
ND
0.1
ND -0.4
n/a
Erosion of Natural Deposits;
Industrial Discharge
Hardness, total as CaCO3 (ppm)
Not Regulated
n/a
373
265
136-650
n/a
Runoff or Leaching from Natural Deposits
Hardness, total (grains/gallon)
Not Regulated
n/a
22
15
8-38
n/a
Runoff or Leaching from Natural Deposits
Magnesium (ppm)
Not Regulated
n/a
26.8
26
6.4-52.4
n/a
Runoff or Leaching from Natural Deposits
Manganese (ppb) **
50*
n/a
0.75
1.9
ND -2.9
n/a
Erosion of Natural Deposits
N-nitrosodimethylamine (ppt)
NL = 10
n/a
ND
3.1
ND - 3.1
n/a
Byproduct of Drinking Water Chloramination,
Industrial Processes
pH (pH units)
Not Regulated
n/a
7.7
8.1
7.4-8.1
n/a
Hydrogen Ion Concentration
Perfluoro butane sulfonic acid (ppt)
NL = 500
n/a
4.2
ND
ND- 11.7
n/a
Industrial Discharge
Perfluoro heptanoic acid (ppt)
Not Regulated
n/a
<4
ND
ND -7.3
n/a
Industrial Discharge
Perfluoro hexane sulfonic acid (ppt)
Not Regulated
n/a
7.6
ND
ND- 18
n/a
Industrial Discharge
Perfluoro octane sulfonic acid (ppt)
NL = 6.5
n/a
9.9
ND
ND - 30.3
n/a
Industrial Discharge
Perfluoro octanoic acid (ppt)
NL = 5.1
n/a
8
ND
ND -19.5
n/a
Industrial Discharge
Perfluorohexanoic Acid (ppt)
Not Regulated
n/a
5.7
ND
ND- 16.6
n/a
Industrial Discharge
Potassium (ppm)
Not Regulated
n/a
2.3
4.6
1.7-4.7
n/a
Runoff or Leaching from Natural Deposits
Sodium (ppm)
Not Regulated
n/a
80.9
96
52.7- 131
n/a
Runoff or Leaching from Natural Deposits
Total Organic Carbon (ppm)
TT
n/a
<0.3
2.4
ND - 2.7
n/a
Various Natural and Man-made Sources
Total Organic Carbon (ppm) ***
Not Regulated
n/a
0.3
NR
0.12-0.6
n/a
Various Natural and Man-made Sources
ppb = parts -per -billion; ppm = parts -per -million; ppt = parts -per -trillion; pCi/L = picoCuries per liter; NTU = nephelometric turbidity units; pmho/cm = micromhos per centimeter;
NR = Not Required to be analyzed; ND = not detected; < = average is less than the detection limit for reporting purposes; MCL = Maximum Contaminant Level;
(MCLG) = federal MCL Goal; PHG = California Public Health Goal; NL = Notification Level; n/a = not applicable; TT = treatment technique
*Contaminant is regulated by a secondary standard.
**Manganese is regulated with a secondary standard of 50 ppb but was not detected, based on the detection limit for purposes of reporting of 20 ppb.
Manganese was included as part of the unregulated contaminants requiring monitoring.
***Total organic carbon was also included as part of the unregulated contaminants requiring monitoring.
Turbidity - combined filter effluent Treatment Turbidity Tr
Metropolitan Water District Dienner Filtration Plant
t Technique Measurements Violation?
1) Highest single turbidity measurement 0.3 NTU 0.04 No
Typical Source
of Contaminant
Soil run-off
2) Percentage of samples less than 0.3 NTU
95%
100%
No
Soil run-off
Turbidity is a measure of the cloudiness of the water, an indication of particulate matter, some of which might include
Low turbidity in Metropolitan's treated water is a good indicator of effective filtration. Filtration is called a "treatment
A treatment technique is a required process intended to reduce the level of contaminants in drinking water that are difficult
harmful microorganisms. NTU = nephelometric turbidity units
technique" (TT).
and sometimes impossible to measure directly.
DocuSign Envelope ID: F31 D1 073-2A1 C -44F6-9616-191 E7AF1 8364
Eight locations in the distribution system are tested quarterly for total trihalomethanes and haloacetic acids;
twenty locations are tested monthly for color, odor and turbidity. Color and odor were not detected in 2020.
MRDL = Maximum Residual Disinfectant Level; MRDLG = Maximum Residual Disinfectant Level Goal
*Contaminant is regulated by a secondary standard to maintain aesthetic qualities (taste, odor, color).
Lead (ppb) 15 0.2 5.4 1 / 53
Copper (ppm) 1.3 0.3 0.2 0/53
No Corrosion of Household Plumbing
No Corrosion of Household Plumbing
During 2018, 53 residences were tested for lead and copper at -the -tap.
Lead was detected in seven samples; one exceeded the regulatory action level. Copper was detected in 45 homes; none exceeded the regulatory action level.
A regulatory action level is the concentration of a contaminant which triggers treatment or other requirements that a water system must follow.
In 2020, no school submitted a request to be sampled for lead.
Unregulated
2020 City of
• •
Quality
Disinfection
Byproducts
Total Trihalomethanes (ppb)
•
80 15
Detections
ND— 15
No Byproducts of Chlorine Disinfection
Haloacetic Acids (ppb)
60 4
ND — 5.6
No Byproducts of Chlorine Disinfection
Chlorine Residual (ppm)
(4/4) 0.8
0.56-0.93
No Disinfectant Added for Treatment
Aesthetic Quality
2020
Chlorodibromoacetic Acid (ppb)
n/a
Turbidity (NTU)
5' 0.15
ND -1.6
No Erosion of Natural Deposits
Eight locations in the distribution system are tested quarterly for total trihalomethanes and haloacetic acids;
twenty locations are tested monthly for color, odor and turbidity. Color and odor were not detected in 2020.
MRDL = Maximum Residual Disinfectant Level; MRDLG = Maximum Residual Disinfectant Level Goal
*Contaminant is regulated by a secondary standard to maintain aesthetic qualities (taste, odor, color).
Lead (ppb) 15 0.2 5.4 1 / 53
Copper (ppm) 1.3 0.3 0.2 0/53
No Corrosion of Household Plumbing
No Corrosion of Household Plumbing
During 2018, 53 residences were tested for lead and copper at -the -tap.
Lead was detected in seven samples; one exceeded the regulatory action level. Copper was detected in 45 homes; none exceeded the regulatory action level.
A regulatory action level is the concentration of a contaminant which triggers treatment or other requirements that a water system must follow.
In 2020, no school submitted a request to be sampled for lead.
Unregulated
Chemicals
Requiring
Monitoring in
the Distribution System
at (800) CALL -MWD (225-5693).
Contaminant
Bromochloroacetic Acid (ppb)
Notification
Level
n/a
PHG
n/a
Average
Amount
0.68
Range of
Detections
ND — 3.8
Most Recent
Date
2020
Bromodichloroacetic Acid (ppb)
n/a
n/a
0.26
ND -2.8
2020
Chlorodibromoacetic Acid (ppb)
n/a
n/a
0.2
ND— 1.2
2020
Dibromoacetic Acid (ppb)
n/a
n/a
0.98
ND — 2.1
2020
DichloroaceticAcid (ppb)
n/a
MCLG=0
0.76
ND -6.1
2020
Monobromoacetic Acid (ppb)
n/a
n/a
0.06
ND — 0.4
2020
Trichloroacetic Acid (ppb)
n/a
MCLG=20
0.28
ND -4.3
2020
Source Water Assessments
Imported (MWDSC) Water Assessment
A copy of the most recent summary of either Watershed
Every five years, MWDSC is required by DDW to examine
Sanitary Survey or the SWA can be obtained by calling MWDSC
possible sources of drinking water contamination in its State
at (800) CALL -MWD (225-5693).
Water Project and Colorado River source waters.
Groundwater Assessment
The most recent watershed sanitary surveys of its source
water supplies from the Colorado River was updated in 2015 and
An assessment of the drinking water sources for the City
the State Water Project was updated in 2016.
was completed in December 2002. The groundwater sources
Water from the Colorado River is considered to be most
are considered most vulnerable to the following activities not
vulnerable to contamination from recreation, urban/stormwater
associated with detected contaminants: confirmed leaking
runoff, increasing urbanization in the watershed, and
underground storage tanks, dry cleaners, and gas stations.
wastewater. Water supplies from Northern California's State
The groundwater sources are considered most vulnerable to
Water Project are most vulnerable to contamination from
the following activities associated with contaminants detected
urban/stormwater runoff, wildlife, agriculture, recreation, and
in the water supply: known contaminant plumes, historic
wastewater.
agricultural activities and application of fertilizers, and sewer
USEPA also requires MWDSC to complete one Source Water
collection systems.
Assessment (SWA) that utilizes information collected in the
A copy of the complete assessment is available at State Water
watershed sanitary surveys. MWDSC completed its SWA in
Resources Control Board, Division of Drinking Water, 2 MacArthur
December 2002. The SWA is used to evaluate the vulnerability
Place, Suite 150, Santa Ana, California 92707.
of water sources to contamination and helps determine whether
You may request a summary of the assessment by contacting
more protective measures are needed.
the City of Tustin Water Services at (714) 361-4719.
DocuSign Envelope ID: F31 D1 073-2A1 C -44F6-9616-191 E7AF1 8364
TUSTIN City of Tustin
Water Services
'* 300 Centennial Way
Tustin, California 92780
` BUILDING OUR FUTURE=
HONORING OUR PAST
PRESORT STD
U.S. Postage
PAID
Santa Ana, CA
Permit No. 1208
You Can Have Confidence in the Quality of Your Water
The City of Tustin Water Services is pleased to our water compares with State and Federal standards.
distribute this report to its water customers. It The City of Tustin Water Services is committed to safe -
provides important information about where your water guarding its water supply and ensuring that your tap water
comes from and the work we perform each day to assure is safe to drink. We also strive to keep you informed about
the water delivered to your tap meets all Federal and State the quality of your water supply.
drinking water standards.
The tap water that comes out of your faucet
has to meet rigorous State and Federal
regulatory standards; otherwise, we wouldn't
be able to deliver it to your home.
Our annual water quality report shares
details about the water you receive. You can
see for yourself that we are meeting and even
exceeding standards required to maintain
water quality.
Take a look inside for details on water sources,
the constituents found in the water, and how
We Invite YouFour
r information about this report, or
to Learn More water quality in general, please
contact Mike Chandler at (714) 573-3178.
About Your The Tustin City Council meets the first
Water's Quality and third Tuesdays of every month at
7:00 pm in the City Council Chambers,
300 Centennial Way, Tustin, California. Please feel free to
participate in these meetings.
For more information about the health effects of the listed
contaminants in the following tables, call the USEPA hotline at
(800) 426-4791.