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Home My WebLink About01 PUBLIC HEALTH GOALS 10-04-04 Agenda Item 1 * Reviewed: AGENDA REPORT City Manager 4., Finance Director N/A MEETING DATE: OCTOBER 4, 2004 TO: WILLIAM A. HUSTON, CITY MANAGER FROM: PUBLIC WORKS DEPARTMENT/WATER DIVISION SUBJECT: PUBLIC HEALTH GOALS (PHGs) 2001-2003 REPORT SUMMARY Provisions of the California Health and Safety Code specify that larger (>10,000 service connections) Water Utility Systems prepare a special report and conduct a public hearing if any contaminants above the Public Health Goals (PHGs) established by the California Environmental Protection Agency's Office of Environmental Health Hazard Assessment (OEHHA) or above the Maximum Contaminant Level Goals (MCLGs) set by the United States Environmental Protection Agency (USEPA) if OEHHA has not published a PHG for the contaminant are detected in the water system. The purpose of the report is to give water system customers information on levels of contaminants below the enforceable mandatory Maximum Contaminant Levels (MCL) established by USEPA and the California Department of Health Service (CDHA). PHGs and MCI-Gs are not enforceable water quality standards and no action to meet them is mandated The Tustin Water System exceeds the PHG for copper but is below the action level of the mandatory MCL established by USEPA and the California Department of Health Services, the agencies responsible for establishing drinking water standards. The City of Tustin is in compliance with all regulatory water quality standards. RECOMMENDATION It is recommended that the City Council take the following actions: 1. Conduct a public hearing to accept and respond to public comments on the 2001- 2003 Public Health Goals Report; and 2. At the conclusion of the public hearing, approve the 2001-2003 Public Health Goals Report. FISCAL IMPACT None. Public Health Goals (PHG) 2001-2003 Report October 4, 2004 Page 2 BACKGROUND SB1307 added provisions to the California Health and Safety Code that mandated all Public Water Systems with more than 10,000 service connections must prepare a brief written report that provides information on the detection of any contaminants above the Public Health Goals (PHGs) published by the California Environmental Protection Agency's Office of Environmental Health Hazard Assessment (OEHHA). The report must also list the detection of any contaminant above the Maximum Contaminant Level Goals (MCLG) set by the USEPA for all other contaminants until such time as OEHHA has published PHGs for the other contaminants. The purpose of the report is to provide water service customers access to information on contaminants below the enforceable mandatory Maximum Contaminant Levels (MCLs). The USEPA and the California Department of Health Services establish MCLs at very conservative levels to provide protection to consumers against all but very low to negligible risk. MCLs are the regulatory definition of what safe is. MCLs are the criteria for being in compliance with regulatory water quality requirements, not MCI-Gs or PHGs. Additionally, the code requirements intend to provide an idea of the cost to totally eliminate any trace of the contaminant from drinking water regardless of how minimal the risks may be. MCI-Gs and PHGs are set at very low levels where the health risks are very low. Determination of health risk at these low levels is frequently theoretical based on risk assessments with a lot of assumption and mathematical extrapolation. Best available technologies to measure such low levels have not been defined and may not be realistically available. Therefore, any costs estimates are highly speculative and have limited value. DISCUSSION The only constituent that exceeds its PHG in the City of Tustin's Distribution System is copper. All other water quality monitoring results are less than the PHG or MCLG. There is no drinking water Maximum Contaminant Level (MCL) for copper. Instead, the California Department of Health Services has adopted an action level for copper where the g0th percentile value of all samples from household taps should not be exceeded. Based on the September 2003 sampling data, the 90th percentile value for copper in the Tustin Distribution System was 0.42 mg/l. This value exceeds the PHG level of 0.17 mg/I established by the OEHHA but is lower than the regulatory level of 1.3 mg/I established by the California Department of Health Services. The category of health risk for copper is gastrointestinal irritation. By virtue of being in full compliance with the Federal and State regulatory requirements for copper, the California Department of Health Services has deemed that the Tustin Water System has optimized corrosion control. Optimizing corrosion control is considered to be the best available technology to deal with corrosion issues and with any copper findings. The Water Division will continue to monitor water quality parameters that relate to corrosivity, such as pH, hardness, alkalinity, total dissolved solids, and will take action such as additional line flushing to maintain our system in an "optimized corrosion control" condition. Public Health Goals (PHG) 2001-2003 Report October 4, 2004 Page 3 Since the water system is meeting the 'optimized corrosion control' requirements, it is not prudent to initiate additional corrosion control treatment as it involves the addition of other chemicals and there could be additional water quality issues raised. Therefore, no estimate of cost for treatment options to meet the Public Health Goal levels was prepared. Tim D. Serlet Director of Public Works/City Engineer TDS:ccg:Public Health Goals 2001-2003.doc Attachment: Public Health Goals(PHG)2001-2003 Report 00- PURPOSE The purpose of this report is for the City of Tustin Water Service (TWS)to comply with the provisions of the California Health and Safety Code. This code specifies that larger (>10,000 service connections)water utilities prepare a special report by July 1, 2004 for the calendar year 2001-2003 if their water quality measurements have exceeded any Public Health Goals (PHGs) established by the Cal-EPA's Office of Environmental Health Hazard Assessment (OEHHA). The law requires that where OEHHA has not adopted a PHG for a constituent, the water suppliers are to use the Maximum Contaminant Level Guidelines (MCLGs) adopted by United States Environmental Protection Agency (USEPA). These PHGs and MCLGs are listed in Attachment No. I This legislative requirement was established to give water system customers access to information on levels of contaminants even below the enforceable mandatory Maximum Contaminant Levels(MCLS). Additionally, this requirement intends to provide an idea of the cost to totally eliminate any trace of the contaminant from drinking water regardless of how minimal the risk might be. INTRODUCTION The TWS provides potable water service to most of the incorporated area of the City and also to unincorporated areas north of the City. The TWS's existing sources of water supply include 15% Metropolitan Water District (MWD) imported water and 85% water from seven untreated or "clear" groundwater wells that pump directly into the system, and two treatment facilities (Main Street Treatment Plant and 17'h Street Desalter)that treat groundwater from six additional wells. At two of the well sites supplying water directly into the system, water is blended with other well water or imported water to reduce nitrate concentrations below the State MCL. More specifically, the Prospect Well is blended with MWD water and the Beneta water well is blended with water from the Columbus-Tustin well. The drinking water quality of the TWS meets all State of California, Department of Health Services (DHS) and USEPA drinking water standards set to protect public health. This report reviews the existing water quality data of the water within the distribution system, and compares the water quality to PHG and MCLG levels,which are not regulatory levels,but are deemed as desirable. In this review of data from 2001 through 2003,the only contaminant that exceeded a PHG or MCLG was copper. This report describes PHGs and MCLGs; describes the data that was reviewed; and presents the results. Summaries of the analytical and monitoring data reviewed are attached for documentation purposes. WHAT ARE PHGs? PHGs are set by the California (OEHHA) which is part of Cal-EPA and are based solely on public health risk considerations. None of the practical risk-management factors that are considered by the USEPA or the DHS in setting drinking water standard MCLS are considered in setting the PHGs. bT,' ° CITY OF TUSTIN T = Public Health Goals 2 GST These factors include analytical detection capability, treatment technology available, benefits and costs. The PHGs are not enforceable and are not required to be met by any public water system. MCLGs are the federal equivalent to PHGs. WATER QUALITY DATA CONSIDERED The California Health and Safety Code, Section 116470(b) is clear that a system only needs to write a report if they exceed one or more PHGs or MCLGs listed on Attachment No. 1. In order to determine if there was an exceedance,water quality data was reviewed. The data reviewed is the same data used for determining compliance with drinking water standards for the years of 2001 through 2003. This data consisted of the following: • Samples from the seven wells supplying water directly to the distribution system. These wells are: 1. Beneta Way 2. Columbus-Tustin 3. Prospect Avenue 4. Tustin Avenue 5. Vandenburg 6. Walnut 7. Yorba Street • Samples from the wells before treatment. These wells are: 1. Main Street Well No. 3 2. Main Street Well No. 4 3. 17'h Street Desalter Well No. 1 4. 17'h Street Desalter Well No. 2 5. 17'h Street Desalter Well No. 4 6. Newport Avenue • Nitrate analysis from the two treatment plant effluents (Main Street Treatment Plant and the 17`h Street Desalter). • Nitrate analysis from the three wells that are blended. These wells are: 1. Columbus-Tustin 2. Beneta Way 3. Prospect Avenue • Coliform data collected within the distribution system. • Copper and Lead samples in the distribution system. WAIVER FOR CERTAIN CONSTITUENTS Many of the constituents required for the PHG report have been waived from sampling by the DHS (see the attached "Groundwater Vulnerability Assessment and Waiver Status" GVAWS), due to the fact that the results for these constituents are consistently non-detect. These constituents are also listed in Attachment No. 1. CITY OF TUSTIN T°St�2 Public Health Goals 3 The current sampling schedule is consistent with the schedule established for the first compliance period, or the second compliance period. DHS has not yet adopted the Period 3 schedule. It is also important to note that two of the PHGs (Acrylamide and Epichlorohydrin) are not applicable for the TWS since they are surface water constituents and not groundwater constituents. RESULTS The only constituent that exceeds its PHG in the TWS distribution system is copper. All other water quality monitoring results are less than the PHG or MCLG. The summary of the results are listed in attachment no. 1. Copper There is no drinking water MCL standard for copper. Instead, DHS has adopted an Action Level of 1.3 mg/I for copper, where the 90'h percentile value of all samples from household taps in the distribution system should not exceed a level of 1.3 mg/l. The established PHG for copper is 0.17 mg/l. The category of health risk for copper is gastrointestinal irritation. Numerical health risk data on copper have not yet been provided by OEHHA. DHS has specified in their GVAWS that copper needs to be sampled only once every three years. Based on the September 2003 sampling data the 90'h percentile value for copper was 0.42 mg/L, which exceeds the PHG level of 0.17 mg/L. The TWS's water system is in full compliance with the Federal and State Lead and Copper Rule, since the 90`h percentile value is below the Action Level. Therefore, the TWS is deemed by DHS to have "optimized corrosion control" for the system. In general, optimized corrosion control is considered to be the best available technology to deal with corrosion issues and with any lead or copper findings. The TWS continues to monitor water quality parameters that relate to corrosivity, such as pH, hardness, alkalinity and total dissolved solids and will take action if necessary to maintain the system in an"optimized corrosion control"condition. Since the TWS meets the Action Level standard, but exceeds the PHG, they may consider an increase in line flushing for the particular distribution areas affected. However, since the TWS is meeting the "optimized corrosion control" requirements, then it is not prudent to initiate additional corrosion control treatment as it involves the addition of other chemicals and there could be additional water quality issues raised. Therefore, no estimate of cost for treatment options to meet the PHG level has been included. RECOMMENDATION FOR FURTHER ACTION The drinking water quality of the TWS meets all DHS and USEPA drinking water standards set to protect public health. To further reduce the levels of the constituents identified in this report that are already significantly below the health-based MCLS established to provide"safe drinking water", CITY OF TUSTIN AW, Public Health Goals 4 Gg yl additionally costly treatment processes would be required. The effectiveness of the treatment processes to provide any significant reductions in constituent levels at these already low values is uncertain. The health protection benefits of these further hypothetical reductions are not at all clear and may not be quantifiable. Therefore,no action is proposed. c��y ° CITY OF TUSTIN 2 Public Health Goals 5 GgTl ATTACHMENT NO. 1 ATTACHMENT NO. 1 CALIFORNIA MCLs AND PHGs AND FEDERAL MCLGs PARAMETERSICONSTITUENTS Units State MCL PHG or(MCLG) INORGANICS ' ANTIMONY m /L 0.003 0.02 10 ASBESTOS fibers/L .2 million 7 million ' BARIUM m /L 0.1 2 ' BERYLLIUM m /L 0.001 0.004 ' CADMIUM m /L 0.001 0.00007 ' CHROMIUM m /L 0.01 0.0025 COPPER al the tap:90thpercentile) m /L 0.05 0.17 2 CYANIDE m /L 0.1 0.15 ' FLUORIDE m /L 0.1 1 LEAD at the tap: 90thpercentile) m /L 0.005 0.002 ' MERCURY m /L 0.001 0.0012 NITRATE as NI m /L 0.4 10 °NITRATE as NO3 m /L 2 45 ' NITRITE ras N1 m /L 0.4 1 ' SELENIUM m /L 0.005 0.05 THALLIUM m /L 0.001 0.0001 ORGANICS Ni ACRYLAMIDE TT 0 2 ALACHLOR m /L 0.001 0.004 ' ATRAZINE m /L 0.001 0.00015 3 BENTAZON m /L 0.002 0.2 ° BENZENE m /L 0.0005 0 ] BENZO a PYRENE m /L 0.0001 0.000004 z CARBOFURAN m /L 0.005 0.0017 °CARBON TETRACHLORIDE m /L 0.0005 0.0001 z CHLORDANE m /L 0.0001 0.00003 °CHLOROETHENE[VINYL CHLORIDE m /L 0.0005 0.00005 °CIS-1,2-DICHLOROETHYLENE m /L 0.01 0.07 2,4-D m /L 0.01 0.07 3 DALAPON m /L 0.00001 0.79 3 DIBROMOCHLOROPROPANE[DBCPI m /L 0.0005 0.0000017 ° 1,2-DICHLOROBENZENE ORTHO m /L 0.0005 0.6 ° 1,4-DICHLOROBENZENE PARA m /L 0.0005 0.006 1,2-DICHLORETHANE 1,2-DCA m /L 0.0005 0.0004 ° 1,2-DICHLOROETHENE 1,1-DCE m /L 0.0005 0.01 ° DICHLOROMETHANE(Methylene Chloride m /L 0.0005 0.004 ° 1,2-DICHLOROPROPANE m /L 0.0005 0.0005 ° 1,3-DICHLOROPROPENE m /L 0.0005 0.0002 t DI 2-ETHYLHEXYL ADIPATE m /L 0.005 0.4 I D 2-ETHYLHEXYL PHTHALATE m /L 0.003 0.012 21 DINOSEB m /L 0.002 0.014 Waiver Status Code: °Annual ' Sample once per compliance period '°Waived for one compliance period. Sampling for asbestos occurred in first compliance period. Thus,it was not tested for this period. 3 Waived for second compliance period 3 Sample once every three years "Not applicable for the City of Tustin ATTACHMENT NO. 1 (Cont'd) CALIFORNIA MCLs AND PHGs AND FEDERAL MCLGs PARAMETERSICONSTITUENTS Units State MCL PHG or(MCLG) INORGANICS 3 DIOXIN 2,3,7,8-TCDD m /L 5x10" 0 2 DIQUAT m /L 0.004 0.015 2 ENDOTHALL m /L 0.045 0.58 2 ENDRIN m /L 0.0001 0.0018 �a EPICHLOROHYDRIN TT 0 a ETHYLBENZENE m /L 0.0005 0.3 2 ETHYLENE DIBROMIDE EBD m /L 0.00002 0 3 GLYPHOSATE m /L 0.025 1 ] HEPTACHLOR m /L 0.00001 1 0.000008 3 HEPTACHLOR EPDXIDE m /L 0.00001 0.000006 ' HEXACHLOROBENZENE m /L 0.0005 0 ] HEXACHLOROCYCLOPENTADIENE m /L 0.001 0.05 ] LINDANE m /L 0.0002 0.000032 2 METHOXYCHLOR m /L 0.01 0.03 METHYL TERTIARY BUTYL ETHER MTBE m /L 0.003 0.013 a MONOCHLOROBENZENE Chlorobenzene m /L 0.0005 0.01 1 OXAMYL m /L 0.02 0.05 3 PENTACHLOROPHENOL m /L 0.0002 0.0004 ] PCHLORAM m /L 0.001 0.5 `POLYCHLORINATED BIPHENYLS PCBs m /L 0.0005 0 2 sILVEX 2,4,5-TP m /L 0.001 0.05 1 SIMAZINE m /L 0.001 0.004 a STYRENE m /L 0.0005 0.1 a 1,1,2,2-TETRACHLOROETHANE 0.0005 0 a TETRACHLOROETHYLENE PCE m /L 0.0005 0 2 THIOBENCARB m /L 0.001 0.07 a TOLUENE m /L 0.0005 0.15 'TOXAPHENE m /L 0.001 0 a TRANS-I,2-DICHLOROETHYLENE m /L 0.0005 0.1 ' 1,2,4-TRICHLOROBENZENE m /L 0.0005 0.005 a 1,1,1-TRICHLOROETHANE 1,1,1-TCA m /L 0.0005 0.2 a 1,1,2-TRICHLOROETHANE 1,1,2-TCA m /L 0.0005 0.003 a TRICHLOROETHYLENE CE m /L 0.0005 0.0008 a TRICHLOROFLUOROMETHANE FREON 11 m /L 0.0005 1 0.7 a TRICHLOROTRIFUOROETHANE FREON 113 m /L 0.01 4 a XYLENES SUM OF ISOMERS 0.0005 1.8 MICROBIOLOGICAL COLIFORM°k POSITIVE SAMPLES % zero Waiver Status Code: a Annual Sample once per compliance period is Waived for one compliance period. Sampling for asbestos occurred in first compliance period. Thus,it was not tested for this period. ]Waived for second compliance period a Sample once every three years wa Not applicable for the City of Tustin BACK-UP BACK-UP MAIN STREET TREATMENT PLANT MONTHLY SUMMARY OF NITRATE ANALYSIS (mg/L) 2001 2002 2003 January 26.7 28.1 28.3 February 23.9 21.4 26.1 March 24.3 22.9 26.1 April 21.3 21.6 26.2 May 20.9 22.2 25.4 June 26.5 26.0 26.5 July 25.2 27.0 25.8 August 24.2 0.0 25.7 September 23.6 0.0 26.7 October 20.9 0.0 26.9 November 20.9 28.5 25.4 December 26.8 32.7 24.5 17TH STREET DESALTER MONTHLY SUMMARY OF NITRATE ANALYSIS (mg/L) 2001 2002 2003 January 30.6 27.8 32.2 February 29.8 26.1 31.4 March 29.9 0.0 31.5 A ril 29.7 0.0 31.5 May 28.6 0.0 34.1 June 27.5 23.9 33.6 July 22.6 23.8 32.7 August 24.7 32.2 34.3 September 27.2 30.9 33.9 October 26.7 32.2 33.4 November 26.0 32.2 29.8 December 27.0 32.1 33.5 DISTRIBUTION SYSTEM MONTHLY SUMMARY OF COLIFORM MONITORING (%) 2001 2002 2003 January 0.0 0.0 0.0 February 0.0 0.0 0.0 March 0.0 0.0 0.0 April 0.0 0.0 0.0 May 0.0 0.0 0.0 June 0.0 0.0 0.0 July 0.0 0.0 0.0 August 0.0 0.0 0.0 September 0.0 0.0 0.0 October 0.0 0.0 0.0 November 0.0 0.0 0.0 December 0.0 0.0 0.0 p o a H v a a a m g r, CIO Y Ka J v o to 'Cf3 g$ o� cm =3gm II 'Boa Ax HE m o, U+ ❑ u£ u no02 O W og fi�xHin 0 GH '=KI WOu E o tin 4�H K S acv 3i33�!'s;i:I3i'iint ' .. e s r� +F °i,`2 0 moc a 9¢ - W 4K flK Pow 5 fir« it k v2 as j c E $ E c ss... s ilii fls 3 p I r!iNPF!IMM t I I° ! ,j iE,I i II,�s{ L s �f sp pi s 333 r JIJDigrrt �S U ^F ioJ 9N JIJ r'F o`er atlt 'E till 17 qq K Fi p � gr uIN r o a; The 2004 Water Quality Report la Drinking Water Quality Want Additional Information! Since 1990,California water utilities have been There's a wealth of information on the internet # providing an annual Water Quality Report to their about Drinking Water Quality and water issues in general.Some goad sites—both local and Md E customers.This year's report covers calendar year na Doul—to begin your own investigation are: 2003 water quality testing,and has been prepared MunicipalWater District of Orange Comity G'r in compliance with new regulations called for in the www.mwdw.com Orange County Water District 1996 reauthorization of the Safe Drinking Water Act. www.ocwd.o rg `. The reauthorization charged the United States Metropolitan Water District Environmental Protection Agency(EPA)with of southern California wwumwdh20.c om updating and strengthening the tap water California Deparnnent of health Services, regulatory program and changed the report's due Division of Drinking Water and €? date toul 1. Env'ronmentil Management J Y wwwdhs.cahwnetgov/ps/ddwern EPA and the California Department of Health U.S.Environmental Protection Agency www.ep&gov/safewater/ Services(DHS) are the agencies responsible for establishing drinking water quality standards.To ensure that your tap water is safe to drink,EPA and DHS prescribe regulations that limit the amount of certain contaminants in water provided by public water systems.DHS regulations also establish Ihn is for contaminants in bottled water that must provide the same protection for public health.The federal 1; F" Food and Drug Administration(FDA) also sets regulations for bottled water. The City of Tustin vigilantly safeguards its water supply and,as in years past,the water delivered to your home meets the standards required by the state and federal regulatory If you have any questions agencies.In some cases,your local about your water,please utility goes beyond what is required Contact us for answers... to monitor for additional For information about this report,or your water contaminants that have known quality m general, lease contact Art Valenzuela at 4 Y B P health risks.For example,the Orange UP (714) 573-3382.The Tustin City Council meets the County Water District,which first and third Mondays of every month at 7:00 pm in manages our groundwater basin, F the City Council Chambers,300 Centennial Way, monitors our groundwater for the Tustin,California. Please feel free to participate in solvent 1,4-dioxane. '` these meetings. ', Unregulated contaminant For more information about the health effects of the mon for ng helps EPA determine R" listed contaminants in the following tables,call the where certain contaminants occur Environmental Protection Agency hotline at and whether it needs to establish (800) 426-4791. iii regulations for those contaminants. What You Need to Know, . . .and How it May Affect You Sources o,j'Supply occurring or be the result of oil and gas production or mining Your drinking water is a blend of mostly groundwater from the Orange activities. County groundwater basin and also surface water imported by the ' Pesticides and herbicides,which may come from a variety of sources Metropolitan Water District of Southern California.Metropolitan's imported such as agriculture,urban storm water runoff,and residential uses. water source is mostly the Colorado River,with augmentation by the State • Organic chemical contaminants,including synthetic and volatile Water project from northern California.Your groundwater comes from a organic chemicals,which are by-products of industrial processes and natural underground reservoir managed by the Orange County Water petroleum production,and can also come from gasoline stations, District that stretches from the Prado Dam and fans across the urban storm water runoff and septic systems. northwestern portion of Orange County,excluding the communities of Brea and La Habra,and stretching as far f.: ,.'ice �g4pur Water Comes From R south as the EI 7bro'Y'. State Water Project Colora j#o The City of lbstin currently utilizes 12 groundwater wells, ?(Northern California) RjGi r (Beneta,Columbus 1Ustin,Main Street#3 and#4, f ' ' x ,w Newport,Prospect, 17th Street#2 and#4,'Ihstin, „,..K Vandenberg,Walnut and Yorba). •., .. Reservoir "d Basic Information About �' " Sintarta.r° ' „ a Rlv Drinking Water Contaminants Metropolitan Water District "v i Drinkingwater,including bottled water,may be of Southern California - �, :: water, g y mwo of araaae County) N t Dl nfe4t gnya.. reasonably expected to contain at least small amounts of Fatin some contaminants.As water travels over the surface of §l ty e Fe a�d,n the land or through the layers of the ground,it dissolves :7 9 ! or✓. naturally occurring minerals and,in some cases, water e wait k v+„' Treatment �;'1 Orange County radioactive material,and can pick up substances Treatment, "h f T Water District -- y.. Underground Aquifer Groundwater resulting from the presence of human or animal activity. r, (Groundwater) Recharge For most people,the presence of contaminants does not i 11 *rage 1. necessarily mean water may be a health risk, i rank �y f Contaminants that may be present in source water 5 , include: - y 1 fi.. a, s x11; • Microbial contaminants,such as viruses and bacteria, '�.,ff which may come from sewage treatment plants,septic Systems,agricultural livestock operations and wildlife. a + Inorganic contaminants,such as salts and metals, which can be naturally occurring or result from urban storm runoff,industrial or domestic wastewater t .k discharges,oil and gas production,mining and ` tGuseawo,by W4br Cando farming. Water DtM'buhon System:Importedwoter appiioa by MelopolAan M&a t dofStgAern Calfornla(,,a MWD of • Radioactive contaminants,which can be naturally Orange county)andpo d to your community by your local wrier rattler rourgrounaEarer s managad by the Orange County Wafer OisorG andpuffgW out of&ground by your loral water refaika: Cryptosporidium revised MCL below 10 mg/L sometime in 2004. The following advisory is issued Cryptasporick'um is a microscopic organism that,when ingested,can cause diarrhea, because in 2003 we recorded an arsenic measurement in the drinking water supply fever,and other gastrointestinal symptoms.The organism comes from animal and/or been 5 to 10 mg/L. Although the level of arsenic in your tap water is well below human wastes and may be in surface water The Metropolitan Water District of Southern the current MCL and would also comply with the new federal standard,it may be California,which did not detect it in the water,rested your surface water for Crypto- within the range of MCL options being considered by the State of California. sporidium in 2003.If it ever is detected,Cryptasporlrh'um is eliminated by an While your drinking water meets the current standard for arsenic,it doers contain effective treatment combination including sedimentation,filtration and disinfection. low levels of arsenic. The standard balances the current understanding of arsenic's The EPA and the federal Centers for Disease Control guidelines on appropriate means to possible health effects against the cost of removing arsenic from drinking water The lessen the risk of infection by Cryptosporizk'um and other microbial contaminants are California Department of Health Services continues to research the health effects of available from EPAs safe drinking water hotline at(800)426-4791 between 9 am and low levels of arsenic,which is a mineral known to cause cancer in humans at high 5 p.m.Eastern Time(6 am.to 2 p.m,in Califomia). concentrations and is linked to other health effects such as skin damage and Immuno-compromised people circulatory problem. Some people may be more vulnerable to constituents in the water than the general Nitrate population.Immuno-compromised people,such as those with cancer who are The City of Thstin provides treatment or blending to reduce the levels of Nitrate that undergoing chemotherapy,persons who have had organ transplants,people with it delivers to its customers.Daily water samples are collected to ensure that the level HIV/AIDS or other immune system disorders,some elderly persons and infants can be of Nitrate does not exceed the Health Department recommended level of 9.0 mg/L. particularly at risk of infections.These people should seek advice about drinking The 2003 average was 4.9 mg/L with a range of 1.9—7.7 mg/L. water from their healthcare providers. The maximum allowable level of nitrate in drinking water,also called the Disinfection and Disinfection Byproducts maximum contaminant level or MCL,is 45 milligrams per liter as nitrate(mg/L as Disinfection of drinking water was one of the major public health advances in the NO3). The nitrate MCL can also be expressed as 10 milligrams per liter as nitrogen 20th century. Disinfection was a major factor in reducing waterbome disease (mg/L as N). Both numbers are equivalent values. At times,nitrate in your tap epidemics caused by pathogenic bacteria and viruses,and it remains an essential water may have exceeded one-half the MCI,but it was never greater than the MCL. part of drinking water treatment tachy The following advisory is issued because in 2003 we recorded nitrate measurements in the drinking water supply which exceeded one-half the nitrate MCL. Chlorine disinfection has almost completely eliminated from our lives the risks of microbial waterbome diseases. Chlorine is added to your drinking water at the Nitrate in drinking water at levels above 45 mg/L(or the equivalent 10 mg/L as N) source of supply(groundwater well or surface water treatment plant). Enough is a health risk for infants of less than six months of age. Such nitrate levels in chlorine is added so that it does not completely dissipate through the distribution drinking water can interfere with the capacity of the infant's blood to carry oxygen, system pipes. This"residual"chlorine helps to prevent the growth of bacteria in the resulting in a serious illness;symptoms include shortness of breath and blueness of pipes that carry drinking water from the source into your home. the skin. Nitrate levels above 45 parts-per-million may also affect the ability of the blood to carry oxygen in other individuals,such as pregnant women and those with However,chlorine can react with naturally-occurring materials in the water to form certain specific enzyme deficiencies. If you are caring for an infant,or you are unintended chemical byproducts,called disinfection byproducts(DBPs),which may pregnant,you should ask advice from your health care provider. pose health risks. A major challenge is how to balance the risks from microbial pathogens and DBPs. It is important to provide protection from these microbial Import (Metropolitan) Water Assessment pathogens while simultaneously ensuring decreasing health risks from disinfection In December 2002,Metropolitan Water District of Southern California completed byproducts. The Safe Drinking Water Act requires the U.S.Environmental Protection its source water assessment of its Colorado River and State Water Project supplies. Agency(EPA)to develop rules to achieve these goals. Colorado River supplies are considered to be most vulnerable to recreation,urban/ storm water runoff,increasing urbanization in the watershed and wastewater. Trihalomedmes(THMs)and Haloacetic Acids(HAAs)are the most common and State Water Project supplies are considered to be most vulnerable to urban/storm most studied DBPs found in drinking water treated with chlorine. In 1979,the U.S. water runoff,wildlife,agriculture,recreation and wastewater.A copy of the assess- EPA set the maximum amount of total THMs allowed in drinking water at 100 parts ment can beobtained by contacting Metropolitan by phone at(213)217-6850. Per billion as an annual running average. Effective in January 2002,the Stage 1 Disinfectants/Disinfection Byproducts Rule lowered the total THM maximum GroundwaterAssessment annual average level to 80 parts per billion and added HAAs to the list of regulated An assessment of the drinking water sources for City of Tustin water Services was chemicals in drinking water Your drinking water complies with the Stage 1 completed in December 2002.The groundwater sources are considered most valuer- Disinfectants/Disinfection Byproducts Rule. In 2003,the U.S.EPA proposed a Stage able to the following activities not associated with detected contaminants: Confirmed 2 regulation that will further reduce allowable levels of DBPs in drinking water leaking underground storage tanks,dry cleaners,and gas stations.The groundwater without compromising disinfection itself. sources are considered most vulnerable to the following activities associated with Arsenic contaminants detected in the water supply:Known contaminant plumes,historic agricultural activities and application of fertilizers,and sewer collection systems. The maximum allowable level of arsenic in drinking water,also called the maximum contaminant level or MCL,is 50 milligrams per liter(mg/L). The U.S.Environmental A copy of the complete assessment is available at Department of Health Services Protection Agency recently reduced the arsenic MCL to 10 mg/L. All water systems Office of Drinking Water,Santa Ana District,28 Civic Center Plaza Room 325,Santa must comply with this new standard by 2006. The State of California Department of Ana,CA 92701.You may request a summary of the assessment by contacting the City Health Services is in the process of reviewing the arsenic MCL and may propose a of Tustin Water Services at(714)573-3382. City of Tustin Groundwater Quality PHG Average Range of MCL Most Recent Typical Source Chemical MCL (MCLG) Amount Detections Violation? Sampling Date of Contaminant Radiologicals Alpha Radiation(pCVL) 15 Na <1 ND-48 No 2003 Erosion of Natural Deposits _ Radwm(pCVU 5 Na <0.5 ND-1.1 No 2003 Erosion of Natural Deposits Uranium(pCi/L) - - - 20 0.5 1.5 ND-4.1 No 2003 Erosion of Natural Deposits Inorganic Chemicals Aluminum(ppm) 1/02' 0.6 <0.05 ND-0,09 No 2003 Erosion of Natural Deposits Arsenic(pph) 50 n/a 1.5 ND-51 No 2003 Erosion of Natural Deposits Barium(ppm) _...1 -- 2 <0.1- - ND-0.7 No 2003 Eroron of Natural Deports _... ...0... ......... .-._. -..-... .......E ...___....... .....__ Fluoride(ppm) 2 1 0.20 ND-0.40 No 2003 Erosion of Natural Deposits Mercury(ppb) 2 1.2 <1 ND-1.5 No 2003 Erosion of Natural Deposits Nitrate(ppm as N) 10 - 10 4.9 1,9-7.7 No 2003 Fertilizers,Septic Tanks Nitrate+Nitrite(ppm as N) 10 10 4.9 1 9-73 No 2003 Fertilizeq Septic Tanks Selenium(ppb) 50 (50) <5 -ND-13 No -2003 Erosion of Natural Deposits Secondary Standards* Chloride(ppm) 500* n/a 125 48-325 No 2003 Erosion of Natural Deposits Color(color units) 15* ma 3 NO-20 No 2003 Erosion of Natural Deposits Specific Conductance(pmho/cm) 11600* - n/a 1,056 588 2,040 No -2003 -Eroslon of Natural Deposits Sulfate(ppm) 500* n/a 147 77-277 No 2b63 Erosion of Natural Deposits Total Dissolved Solids(ppm) 1,000* n/a 663 353-1,310 No 2003 Erosion of Natural Deposits Turbidity into) S. Na 2 ND-26 No 2003 Erosion of Natural Deposits Unregulated Contaminants Requiring Monitoring Bicarbonate(ppm) Not Regulated n/a 233 169-378 n/a 2003 Erosion of Natural Deposits Boron(ppm) Not Regulated n/a 0.1 ND-G.3 Na 2003 Erosion of Natural Deports _ Calcium(ppm) Not Regulated ma 101 34-208 Na 2003 Erosion of Natural Deposits Hexavalent Chromium(ppb) Not Regulated - n/a ai ND-1 n/a 2003 Erosion of Natural Deposits Magnesium(ppm) - Not Regulated n/a 26 4.8-61 n1a 2003 Erosion of Natural Deposits .....0 n ill units) NotRegulated n/a 7.6 69-81 n/a 2003 Aodrtg hydrogen Ions Perchlorate NotRegulatedNa <4 Nd-EA Na 2003 Rocket fuel,munitions Potassium(ppm) - - Not Regulated Na 2.3 1.7-3,5 Na _2003 Erosion of Natural Deposits Sodium(ppm) --- Not-Regulated n/a 77 48-141 n/Id -2003 Erosion of Natural'Deposits Total Alkallmry,as CaCO'(ppm) Not Regulated n/a 191 138-310 n/a 2003 Erosion of Natural Deposits Total Hardness as CaCO'(ppm) Not Regulated n/a 359 105-764 n/a 2003 Erosion of Natural Deposits Vanadium(ppb) � - Not Regulated n/a - <3 ND-7.0 ---n/a- 2003 Erosion of Natural Deposits ppb=parts-per-billion;ppm=parts-per-million;FCA=picoCunes per liter;ntu=nephelometric turbidity unit;ND=not descried;Na=not applicable, <=average is less than the detection limit for reporting purposes;MCL=Maximum Contaminant Level;(MCLG)=federal MCL Goal;PHG=California Public Health Goal pmho/cm=micromho per centimeter;*Contaminant is regulated by a secondary standard to maintain aesthetic qualities(taste,odor,color). Lead and Copper Action Levels at Residential Taps Action Level Health 90th Percentile Sites Exceeding AL/ AL (AL) Goal Value Number of Sites Violation? Typical Source of Contaminant Lead(ppb) 15 2 <5 0/44 No Corrosion of household plumbing Copper(ppm) 1.3 - 017 -- 0.42 -- 0/44 No - Corrosioni household plumbing Lead and copper at-thetap samples were collected from 44 residences in September 2003 Lead was detected m two homes and copper in 41 homes. None of these samples exceeded the lead or copper action level. A regulatory action level is the concentration of a contaminant which,if exceeded in more than 10 percent of the samples,triggers treatment or other requirements which a water system must follow Definitions Public Health(foal(PHGr) Department of Health Services for chemicals that Treatment Technique(Ti The level of a contaminant in drinking water below lack MCIs. A required process intended to reduce the level of a which there is no known or expected risk to health. contamtant m drinking water. Public health owls aset by the California Primary Drinking u:dc'r SNanilarei(fallcontaminant re Protection Agency. MCL's for contaminants that affect health along with Meast renxeLns their monitoring and reporting requirements,and Water is sampled and tested throughout the year. Me highest vel of a contaminant ant that (Mill water treatment requirements. Contaminants are measured in parts per million The hlg wa level of s contaminant that is allowed m drinking wafer.MCIs arc set a,close to the public Regulatory Action Lervcl (ppm),parts per billion(ppb),parts per trillion health goals and maximum contaminant level goals as The concentration of a contaminant which,if exceed- (pi and even parts per quadrillion(ppq).If this is is economically and technologically feasible. ed,triggers treatment or other requirements which difficult to imagine,think about these compactions: Secondary MCts are set to protect the odor,taste and a water system must follow. Para per million(mg/L): lune per boon OWL):: appearance of drinking water. Maximum C iptimminant Level Goal MC.I.G) Variance • 3 drops i 42 gallons • 1 drop inn 32 y gallons • 1 second in 12 days • 1 second in 32 years The level re contaminant in drinking water below State a EI'A ppt�rmiss'ion not ro meet an MCL ora • 1 penny in$10,000 • 1 penny in$10 million which these is no known or expected risk to health. treatment techNque under certain conditions. • 1 inch in 16 miles • 1 inch In 16,000 miles Maximum contaminant level goats are set by the EPA. 76aU'Sa.Whim erx-for.ovassuravo eelMn wcep,,ev, It is important to mao,,,ho.,tbat even a Wc u Action Urvels(Ai,) Nov.&usearadmuoJwate mnwslwna Ao wlrbxnaftaquari comentmmlfon ofcanadi conkahumn,um adeersety Health-based advisory levels established by the State Sseeofourrala,Ihungd repre�ennNlrtre,aremorelMn oneymrold affect a router supply City of Tustin Water District Distribution System Water Quality MCL(MRDUMRDLG) Average Amount Range of Detections MCL Violation? Typical Source of Contaminant Total Trihalomethanes(ppb) 80 15 ND-56 No Byproducts of chlorine disinfection Haloacetic Acids(ppb) 60 11 ND-25 No Byproducts of chlorine disinfection ChlorineResidual(ppm) (4/4) 1.1 0.5-1.7 No Disinfectant added for treatment Turbidity(ntu) 5` 0.18 0.14-0.39 No Erosion of natural deposits Sixteen locations in the distribution system are tested quarterly for total tnhalomethanes and haleace d acids twenty locations are tested monthly for color,odor and turbidity Color and odor were not detected. Mli=Maximum Residual Disinfectant Level;MRDLG=Maximum Residual Disinfectant Level Goal,ntu=nephelometric turbidity units;ND=not detected; "Contaminant is regulated by a secondary standard to maintain aesthetic qualities(taste,odor,color). Metropolitan Water District of Southern California Treated Surface Water PHIS,or Average Range of MCL Chemical MGL (MCLG) Amount Detections Violation? Typical Source of Contaminant Radiologicals-Tested in 2003 Alpha Radiation(pCi/q 15 Na <1 ND-2S No Erosion of natural deposits Beta Radiation(pCi/L) 50 Na 4.1 ND-5 9 No Decay of man-made or natural deposits Uranium(pCdq 20 0 5 <2 ND-2.6 No Erosion of natural deposits Inorganic Chemicals-Tested in 2003 Fluoride(ppm) 2 1 0.1 ND 02 No Erosion of natural deposits Nitrate and Nitrite as N(ppm) 10 10 0.6 ND 1.4 No Agriculture runoff and sewage_. Nitrate as N(ppm) 10 10 0.6 ND 1 4 No Agriculture runoff and sewage Secondary Standards--Tested in 2003 Chloride(ppm) 500* Na 81 67-105 No Runoff or leaching from in deposits Color(color units) 15• n/a 1 1 No Runoff or leaching from natural.deposits Corrosivity(LSI) non-corrosive Na 0.1 -0.2-0.4 „. No Elemental balance in water Specific Conductance(pmho/cm) 1,600• Na 671 518-890 No Substances that form Ions in water Sulfate(ppm) 500' n/a 109 41 -177 No Runoff or leaching of natural deposits Total Dissolved Solids(ppm) 1,000• Na 384 278 528 No Runoff or leaching of natural deposits Turbidity(NTU) 5" Na 0.05 0.04-0.06 No Runoff or leaching of natural deposits Unregulated Chemicals-Tested in 2003 Alkalinity(ppm) Not Regulated Na 89 73 112 Na Runoff or leaching from natural deposits Boron(ppb) Not Regulated n/a 140 100-160 Na Runoff or leaching from natural deposits Calcium(ppm) Not Regulated Na 37 24-56 Na Runoff or leaching from natural deposits Hardness,total(ppm) Not Regulated Na 164 109 237 Na Runoff or leaching of natural deposits Hardness,total(grainsigal) Not Regulated n/a 9 6 64-14 Na Runoff or leaching of natural deposits Magnesium(ppm) Not Regulated Na 18 12-24 Na Runoff or leaching from natural deposits pH(pH units) Not Regulated Na 8.2 8.0 83 Na Hydroge11 n ion concentratio11 n 11 Potassium(ppm) Not Regulated n/a 3 2 2.7-4.0 Na Runoff or leaching from natural deposits Sodium(ppm) Not Regulated 11 Na 68 55 87 Na Runoff or leaching from natural deposits ppb=parts-per-billion:ppm=parts per million;pCUL=picoCuries per liter ma nephelometric turbidity units pmhcvcm=micromhos per centimeter; ND=not detected;<=average is less than the detection limit for reporting purposes;MCL Maximum Contaminant Leml;(MCLG)=federal MCL Goal; PHG=California Public Health Goal; Na=not applicable;LSI=Langeher Saturation Index;*Contaminant is regulated by a secondary standard. Turbidity-combined filter effluent Treatment Technique Turbidity Measurements TT Violation? Typical Source of Contaminant 1)Highest single turbidity measurement 0.3 NTU 0.06 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. 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 % ! c ! 9 § » � { ( $ i � \ § tea / , - � , ` - ■ e �y zy�: �. �...d . ��\ » . . : .�� . �� ! % «: � \ � y / � § w / \ } / o § ) � @ # u + / , � ! . � � ? � ! / \\ � \ \ � \ : \ y � � 7 ? � 0 . . . . . � . aF�7p�°i'141 ljngilgi uE The 2003 Water Quality Report Drinking Water Quality, " ,i= ' Since 1990,California water utilities have been providing an annual Water Quality Report to their T,0101 customers.This year's report covers calendar year 2002 water quality testing,and has been prepared in compliance with new regulations called for in the 1996 reauthorization of the Safe Drinking Water Act.The I "" reauthorization charged the United 5'", : States Environmental Protection This information is important Have someone unumlate it for you. Fri, p,itii, d ! Agency(EPA)with updating and nlaarc�mc, �re�sr z<r.Hbr. strengthening the t water B g tap regulatory program and changed Esta inlormadbn es impodante.Por favor pidaleaalguien Sue se la hadu¢a. E . the report's due date to July 1. � si�r''��i�I vsgi pvr a v, . +° EPA and the California Department ; f -11s" -IP fix.^ r%1`-1 ='1"- aW1 V $ Of Health$elVlCeS(DHS) are the 4Vir pat,.jL14°I1 3�144R^J9=. agencies responsible for gin bio do d c6 nhun tin t& uan bon vL nv6c u6n cua u vi. ., i Y B 4 B g 9 Y �, :� establishing drinking water quality Hay dich in hoic n6i chuyM v6i nh@ng at th6ng hidu. MlIII.Illir standards.To ensure that your tap _.................. -----------_ Fr�Jrigz,I 'p p n a�'{ water is safe to drink,EPA and DHS �flY ,qsg°h i prescribe regulations that limit the amount of certain contaminants in water provided by public water systems.DHS regulations also establish limits for contaminants in bottled water that must provide the same protection for public health.The federal Food and Drug Administration (FDA) also sets regulations for bottled water. , The City of Tustin vigilantly safeguards its water supply and,as in years past,the water delivered to your ! a home meets the standards required by the state and federal regulatory If you have any questions fF I fifp,a h v )rp lg# # agencies.In some cases,your local about your water,please utility goes beyond what is required contact us for answers.. . to monitor for additional R. Yl i For information about this report,or your water quality contaminants that have known , Port # g, sg#r in general,please contact Art Valenzuela at(714) health risks.For example,the Orange xf `M111 573-3382.The Tustin Ci Council meets the first and 3 ty County Water District,which d r s third Mondays of eve month at 700 m in the Ci Pq # r++ ,,f ys every F City manages our groundwater basin, ( UF �1 ; g i' . Council Chambers,300 Centennial Way,lustin, monitors our groundwater for the California Please feel free to participate in these solvent 1,4-dioxane. "I l �,FIa : � meetings ,. Ite e p,rg R prrr v is d,t# RiEiv�i. Unregulated Contaminant 3 I6# t Fa 4 FaF i�. , £ a d E"IP Far more information about the health effects of the monitoring helps EPA determine listed contaminants in the h}' ds r'lya following tables,call the where certain contaminants occur Environmental Protection Agency hotline at(800) and whether it needs to establish v, 426-4791. regulations for those contaminants. d1 ; What You Need to Know, . . . and .How it May Affect You Sources of Supply occurring or be the result of oil and gas production or mining Your drinking water is a blend of mostly groundwater from the Orange activities. County groundwater basin and also surface water imported by the + Pesticides and herbicides,which may come from a variety of Metropolitan Water District of Southern California.Metropolitan's sources such as agriculture,urban storm water runoff,and residential uses. imported water source is mostly the Colorado River,with augmentation a Organic chemical contaminants,including synthetic and volatile by the State Water project from northern California.Your groundwater organic chemicals,which are by-products of industrial processes comes from a natural underground reservoir managed by the Orange and petroleum production,and can also come from gasoline County Water District that stretches from the Prado Dam and fans stations,urban storm water runoff and septic systems. across the northwestern portion of Orange County, excluding the communities of Brea and La Habra,and Where Your Water Comes From stretching as far south as the El Toro Y. State The City of 1Ustin currently utilizes 12 groundwater Water Project Colorado (Northern California) RIVET wells, (Beneta,Columbus Tustin,Main Street#3 and #4,Newport,Prospect, 17th Street#2 and#4,Tustin, Vandenberg,Walnut and Yorba). Reservoir _ Government Regulations Santa Ana of Potential Contaminants River Drinkingwater,including bottled water,may be metropolitan ofSoten Water District g y southern California water reasonably expected to contain at least small amounts (Mwo of one,"county) Disinfection Facility of some contaminants.As water travels over the surface of the land or through the layers of the , Pe Paha on ground,it dissolves naturally occurring minerals and, f Well in some cases,radioactive material,and canP P ick u water j Treatment Orange County Plant Water District substances resulting from the presence of human Or Underground Aquifer Groundwater Ir animal activity.For most people,the presence of (Groundwater) Recharge contaminants does not necessarily mean water maybe storage a health risk. If Tank Contaminants that may be present in source water , include: i m, r ♦ Microbial contaminants,such as viruses and bacteria,which may come from sewage treatment plants,septic systems,agricultural livestock y operations and wildlife. ♦ Inorganic contaminants,such as salts and metals, which can be naturally occurring or result from urban storm runoff,industrial or domestic m F wastewater discharges,oil and gas production, 111woa1wn t�`c `a"aaw mining and farming. WaterDldnNawn S)d-fmponerf warersWiwd by Ma'ropolikm Wafer Didnit ofku&m Californur(ala MWD of i Radioactive contaminants,whichcanbena[urally Orungecou»ry7andpodwyo'"`°"'nuo*byyour ba aerr�e`Ywgrounalvafera'nmu`geabyde Orange county Water Daind and pumpad out of tbegmund by your Well wafer retailer: Cryptosporidium ensure that the level of Nitrate does not exceed the Health Department Cryptosporidium is a microscopic organism that,when ingested,can cause recommended level of 9.0 mg/L.The 2002 average was 4.7 mg/L with a diarrhea,fever,and other gastrointestinal symptoms.The organism comes range of 3.2—6.6 mg/L. from animal and/or human wastes and may be in surface water.The Nitrate in drinking water at levels above 10 mg/L(as Nitrogen)is a health Metropolitan Water District of Southern California,which did not detect it risk for infants of less than six months of age.Such nitrate levels in in the water,tested your surface water for Cryptosporidium in 2001.If it drinking water can interfere with the capacity of the infant's blood to cam ever is detected,Cryplosporddtum is eliminated by an effective treatment oxygen resulting in serious illness;symptoms include shortness of breath combination including sedimentation,filtration and disinfection. and blueness of the skin Nitrate levels above 10 mg/L(as Nitrogen)may The EPA and the federal Centers for Disease Control guidelines on appropriate also affect the ability of the blood to carry oxygen in other individuals,such means to lessen the risk of infection by Cryptosporidium and other microbial as pregnant women and those with certain specific enzyme deficinecies. if contaminants are available from EPA's safe drinking water hotline at you are caring for an infant,or you are pregnant,you should ask advice (800)426-4791 between 9 a.m.and 5 p.m.Eastern Time(6 a.m.to 2 p.m.in from your health care provider. California). Immuno-compromised people Arsenic Some people may be more vulnerable to constituents in the water than the Arsenic is an element that occurs in the earth's crust.Accordingly,there are general population.Immunocompromised people,such as those with cancer natural sources of exposure.Exposure to arsenic at high levels can pose who are undergoing chemotherapy,persons who have had organ transplants, serious health effects,as it is a known human carcinogen.In addition,it people with HIV/AIDS or other immune system disorders,some elderly has been reported to affect the vascular system and has been associated with persons and infants can be particularly at risk of infections.These people the development of diabetes.EPA established a maximum contaminant should seek advice about drinking water from their healthcare providers. level for arsenic of 50 parts per billion in 1975.In January 2002,EPA finalized a new standard for arsenic in drinking water that requires public Trihalomethanes and Disinfection water supplies to reduce arsenic to 10 parts per billion by 20. Trihalomethanes(THMs)are chemical byproducts of disinfecting drinking Groundwater and imported water supplies in Tustin generally range water.THMs are a group of four chemicals that are formed when chlorine between non-detectable levels and 5.1 parts per billion. reacts with naturally occurring organic and inorganic matter in water.The trihalomethanes are chloroform,bromodichloromethane, Import (Metropolitan) Water Assessment dibromochloromethane,and bromoform. In December 2002,Metropolitan Water District of Southern California Chlorine disinfection has almost completely eliminated from our lives the completed its source water assessment of its Colorado River and State risks of microbial waterbome diseases such as typhoid fever,cholera,and Water Project supplies.Colorado River supplies are considered to be most dysentery.However,the health benefit of chlorination has introduced some vulnerable to recreation,urban/storm water runoff,increasing possible risks from THMs.Some scientific studies have linked THMs to urbanization in the watershed and wastewater.State Water Project supplies increased risk of cancer.Other studies have linked THMs to reproductive are considered to be most vulnerable to urban/storm water runoff, problems,including miscarriage.A California study released in 1998 found wildlife,agriculture,recreation and wastewater.A copy of the assessment an increase in miscarriage rate for women who drank 5 or more glasses of can be obtained by contacting Metropolitan by phone at(213)217-6850. cold water containing more than 75 parts-per-billion total THMs.State and federal officials have cautioned that this study in not definitive and further Groundwater Assessment investigation is now underway. An assessment of the drinking water sources for City of Tustin Water Services The maximum amount of total THMs allowed in drinking water is regulated was completed in December 2002.The groundwater sources are considered by the U.S.EPA,which set a maximum annual average limit in drinking most vulnerable to the following activities not associated with detected water of 100 parts per billion in 1979.Effective in January 2002,the Stage 1 contaminants: Confirmed leaking underground storage tanks,dry cleaners, Disinfectants/Disinfection Byproducts Rule revises the total THM maximum and gas stations.The groundwater sources are considered most vulnerable annual average level at 80 parts per billion.Your drink ng water complies to the following activities associated with contaminants detected in the with the Stage 1 Disinfectants/Disinfection Byproducts Rule(see the water supply:Known contaminant plumes,historic agricultural activities average THM value in the accompanying table).EPA is currently crafting a and application of fertilizers,and sewer collection systems. Stage 2 regulation that will further reduce allowable levels in drinking water. A copy of the complete assessment is available at Department of Health Nitrate Services Office of Drinking Water,Santa Ana District,28 Civic Center Plaza The City of Tustin provides treatment or blending to reduce the levels of Room 325,Santa Ana,CA 92701.You may request a summary of the assess- Nitrate that it delivers to its customers.Daily water samples are collected to ment by contacting the City of Tustin Water Services at(714)573-3382. City of Tustin Groundwater Quality PHG Average Range of MCL Most Recent Typical Source Chemical MCL (MCLG) Amount Detections Violation? Sampling Date of Contaminant Radiologicals Alpha Radiation(pCi/L) 15 n/a <3 ND-5.9 No 2002 Erosion of Natural Deposits Radium(pCJL) 5 Na <1 ND-11 No 2002 Erosion of Natural Deposits Uranium(pCG/L) 20 - 0.5 <2 ND-45 No 2002 - ErosionofNaturalDeposits - Inorganic Chemicals Aluminum(ppm) 1 11-01.2 0 6 <0.05 ND-0 53 No 2002 Erosion of Natural Deposits Arsenic(ppb) 50 Na <2 ND-5.1 - No 2002 Erosion of Natural Deposits Barium(ppm) 1 Na <0.1 ND-0 12 No 2002 Erosion of Natural Deposits ._..._ _.. _... _..... ...0,12 ...._... ......... ._..... ....._ ._tura ......... Fluoride(ppm) 2 1 0.1ND-0.29 No 2002 Erosion of Natural Deposits Mercury(ppb)Ippm 2 - 1 2 <1 ND-1.5 No 2002 Erosion of Natural Deposits ..... arra_ arra__. ..... ......_. .attar _tura aura_. arra... Nitrate ppm as N) 10 10 4.7 3 2-6 6 No 2002 Fertilrzers,Septic Tans Nitrate+Nitrite(ppm of N) 10 10 47 3 2-1 6 -No 2002 Fertilizers,Septic Tanks attar.. ........ ......... .._._ ..__._ _._. a rte. tura.. _......E attar.. ..attar Selenium(pph) 50 (50) <5 ND-10 No 2002 Erosion of Natural Deposits Secondary Standardsa ......... .............-- - -------- ... ........ -arra-.-.. .--.-'--' rta_ ...-..._.. ----- . Chloride(ppm) _ 500* n/a 152 54-310 No 2002 rt- of Natural Deposits Color(color units) 15* n/a 2.8 ND-20 No 2002 Erosion of Natural Deposits Iron(ppb) 300' na <100 ND-280 No 2002 - Erosion of Natural Deposits Manganese(laii 50' .........na <20 ND-21 ........No 2002 Erosion of Natural Deposits Specific Conductance(prnhac ) 1,600* Na 848 718-1,070 No - 2002 Erosion of Natural Deposits Sulfate(ppm) 500* n/a 165 94 281 No 2002 Erosion of Natural Deposits arta arra. arra.. 54 '-_ -_. aura Total Dissolved Solids(ppm) 1,000* Na 548 420-746 No 2002 Erosion of Natural Deposits .._....... ..._.... arra ... _ ._aura ......_. ......... ......... .......E ......_. ......... Turbidity pitta) 5* Na Z.0 0.2-26 No 2002 Erosion of Natural Deposits Unregulated Contaminants Requiring Monitoring Bicarbonate(ppm) Not Regulated Na 242 ----1-76----324 Na 2002 Erosion of Natural Deposits _. Boron(ppm) Not Regulated n/a <0 1 ND-0.19 Na 2002 Erosion of Natural Deposits Calcium(ppm) Not Regulated Na 113 33-207 Na 2002 Erosion of Natural Deposits Magnesium(ppm) Not Regulated n/a 31 4.4-66 n/a 2002 Erosion of Natural Deposits pH(pH units) - Not Regulated - n/a 7.7 7 4-8 1 n/a 2002 Acidity,hydrogen ions ...rate ......... .._arra _.. .. arra. .__._. ...___.. ......... .......R .....0 .__..._. Perchlorate Not Regulated n/a <4 ND-11 Na 2002 Rocket fuel,munitions Potassium(ppm) Not Regulated -n/a 2A 1 7-3 7 rria 2002 Erosion of Natural Deposits ........ _... aura._ aura.. .....8 arra... ......... _arra.. .......E aura ur Sodium(ppm) Not Regulated Na 80 48-135 Na 2002 Erosion of Natural Deposits Total Alkalinity as CaCO3(ppm) Not Regulatedtart n/a 198 144-265 n/a 2002 Erosion of Natural Deposits Total Hardness as CaCO3(ppm) Not Regulated ,_arra.n/a 252 120-366 ..,....n/a 2002 Erosion of Natural Deposits Total Hardness(grains/gallon) Not Regulated n/a 15 7-21 Na 2002 Erosion of Natural Deposits Vanadium(ppb) Not Regulated n/a 3.7 ND-9.6 n/a 2002 Erosion of Natural Deposits _ _..- '_.. _.e ppb=parts-perebillion;ppm=potion I t for;pori=p purposes, per Iher,ntu=nephelometric t Level; units;NO a not detected;l; =not applicable; *C average is less than the detection limit for lard do purposes;MCLG Maximum Contaminant Level;(MCLG)=federal MCL Goal;PHG=California Public Health Gaal *Contaminant is regulated by a secondary standard to maintain aesthetic qualtties(taste,odor,color). Lead and Copper Action Levels at Residential Taps Action Level Health 40th Percentile Sites Exceeding AL/ AL (AL) Goal Value Number of Stites Violation? Typical Source of Contaminant Lead(ppb) 15 Z <5 0/45 No Corrosion of household plumbing _._ _... tutu. arraaura _._ io -_.. Copper(ppm) 1.3 0.17 0.62 0/45 No Corrosion of household plumbing arra... _tura ....ell ....in ..._.._..N ....._.. _tion __. _._. arra_. lead and copper samples were concentration from selected residences in September d,tri ge sites treatment or the respective eats levels far lead and m must A regulatory anion text is the concentration of a contaminant which,M exceeded,triggers treatment or other requirements which a water System must follow. Definitions Public health Goal(PHG) Department of I Iealth Services for chemicals that Treatment Tcehnigne(TI) The level of a contaminant In dunking water below lack MCLS. A required process intended[o reduce the level of a which[here is no known or expected risk to health. Primary ihitildxagl WatYP Stamlaad(PI)WS) contaminant in drinking water. Public health gProt are set ge the California Measnretni nts Cnvironmental Protection Agency. MCIa for contaminants that affect health along with M"buum Contaminant Level(MCI.) Linear monitoring and repotting requirements,and Water is sampled and tested throughout the year. water treatment requirements. Contaminants are measured in parts per million MCL,;The highest level of contaminant that is allowed in drinking water.MCIare set as close to the public Regulatory Action Level (ppm),pans per billion(ppb),pares per trillion health goals and maximum contaminant level goals as The concentration of o contaminant which.if exceed- (ppt),and even parts per quadrillion(ppq).If this is Is economically and technologically feasible cd.niggers treatment or other requirement,which difficult to imagine,think about these comparisons: Secondary MCLS are set to protect the odor,taste and a water system must follow. I}nYsper million migA): Partaper biflion 6WL): appearance of drinking water. Maxhnu n Contaminant Level Goal M(.LG) Variance s 3 drops in 42 gallons 9 1 drop In 14,000 gallons S 1 second in 12 days 6 1 second In 32 years The level of contaminant in drinking water below State or EPA Mara pion not to meet an MCL or a S 1 penny In$10,000 5 1 penny in$10 million which there is no known or expected risk to health. treatment technique under certain conditions. S 1 inch In 16 mules S I Inch In 16,000 miles Maximum contaminant level goals are set by the GPA. 1Ie 56b allrna vabmmubrformmeambm(nmi0•/m'tlms onexya>aor It is important in rote,banterer,Vitt suen a stat! Action Levels(AL) bnaam de manual quite ambmmorsbdo notdaiapfragvaiHy wrumanHon ofreriain wntamiruuw,can adcvisely Health-1 ed advisory levels established by the State k.me ofudee;lough opetedbi an man Ilan on Wild apdanxuerstoji arra _ _ attar__.- _aura City of Tustin Water District Distribution System Water Quality MCL(MRDV MRDLG) Average Amount Range of Detections MCL Violation? Typical Source of Contaminant Total Trihalomethanes(ppb) 80 18 ND-48 No Byproducts of chlorine disinfection Haloacetic Acids(ppb) 60 17 ND-25 No - Byproducts of chlorine disinfection Chlorine Residual(ppm) (4/4) 13 0.9-18 - No Disinfectant added for treatment Turbidity(ntu) 5* - 0,16 0 13-0 20 No Erosion of natural deposits Sixteen locations in the distribmwn system am tested quarterly for total tnhalomethanes and haloacetic acids,twelve locations are tested monthly for color,odor and turbidity. MRDL=Maximum Resdival Dimfectant Level;MRDLG=Maximum Residual Disinfectant Level Goal;mm=nephelometric turbidity units;ND=not detected *Contaminant is regulated by a secondary standard to maintain aesthetic qualifies(taft odor.color). Metropolitan Water District of Southern California Treated Surface Water PHG,or Average Range of MCL Chemical MCL (MCLG) Amount Detections Violation? Typical Source of Contaminant Radiologicais-Tested in 1999 .-....d ________. . . _.--'--'- _..--.._ .. ..___...-3 -- - ----- ---Er _... ... . ......... .......-....-.... Alpha Radiation(pG/L) 15 Na 3.6 L2 fi 0 No Erosion of natural deposits Beta Radiation(pCGA) 50 Na 6.2 5.2-T8 No Decay of man-made or natural deposits Combined Radium(pCdL). 5 n/a 0.6 ND 1 5 No Erosion of natural deposits Uranium(pci/L) 20 0 5 2.6 ND 3 8 No Erosion of natural deposRs Inorganic Chemicals-Tested in 2002 Fluoride(ppm) 2 1 0.23 0.20 0 27 No Erosion of natural deposits Nitrate and Nitrite as N(ppm) 10 10 <64 ND 0 5 No Agriculture runoff and sewage Nitrate as N(ppm) 10 10 <0.4 ND_0.5 No Agriculture runoff and sewage Secondary Standards'-Tested in 2002 Chloride(ppm) 500' Na 86 76 98 No Runoff or leaching from natural deposits Color(color units) 15* n/a 2 1-3 No Runoff or leaching from natural deposits Corrosivity(LSI) non-corrosive n/a 0.23 0,17-026 - No Elemental balance in water Specific Conductance(umho/cm) 1,600' n/a 843 768-939 No Substances that form ions in water Sulfate(ppm) 500* n/a 171 126-207 No Runoff or leaching of natural deposits Total Dissolved Solids(ppm) 1,000' nM 499 434 567 No Runoff or leaching of natural deposds - - Turbidity(NTU) - 5' n/a 0.06 0.05-007 - No _Runoff or leaching of natural deposits Unregulated Chemicals-Tested in 2002 Alkalinity(ppm) Not Regulated Na 111 9S-124 n/a Runoff or leaching from natural deposits Boron(ppb) Not Regulated Na 130 110-130 Na Runoff or leaching from natural deposits Calcium(ppm) _ Not Regulated Na 54 43-63 - n/a Runoff or leaching from natural deposits - Magnesium(ppm) Not Regulated Na 24 21 -26 n/a Runoff or leaching from natural deposits Per (ppb) Not Regulated Na <4 ND 4 n/a Rocket fuel discharged to the Colorado River pH(pH units) „ Not Regulated Na - 8 -8 n/a Hydrogen ion concentration Potassium(ppm) Not Regulated Na 3.9 3.7-42 n/a -Runoff or leaching from natural deposits Sodium(ppm) Not Regulated Na 80 74-89 - n/a -Runoff or leaching from natural deposits Hardness(ppm) Not Regulated Na 232 192-258 n/a Runoff or leaching of natural deposits Hardness(grams/gal) Not Regulated _ n/a 14 i i 15 n/a Runoff or leaching of natural deposits ppb parts-per-billion;ppm=parts-per-million;pCJL=proCuries per liter,WU=nephelometric turbidity unit;No not delected;<=average is ess than the detection limit for reporting purposes; MCL=Maximum Contaminant level;(MCLG)=federal MCL Goal;PHG=California Public Health Goal;Na=not applicable;LSI=langelier Saturation Index;pmholcm=micromho per centimeter *Contaminant is regulated by a secondary standard to maintain aesthetic qualities(taste,odor,color). Turbidity-combined filter effluent Treatment Technique Turbidity Measurements TT Violation? Typical Source of Contaminant 1)Highest single turbidity measurement 0.3 NTU 0.14 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 cloudmessof the water,an indication of particulate matter,some of which might include harmful microorganisms.Low turbidity in Metropolitans treated water rs a good mdori of effective filtration.Filtration is called a treatment technique.mr,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 ntu=nephelometric turbidity unit Information Collection Rule Disinfection By-Products in Metropolitan Water District Finished Water Data Collected August 1997 - November 1998 Chemical Average Amount(ppb) Range of Detections(ppb) Typical Source of Contaminant Disinfection Ry-Products Haloacetomtrlles 7,6 5.1 11 Formed by the reaction with chlorine disinfectant Haloketones - 1,7 0.7- 2 7 Formed by the reaction with chlorine d¢mcta fent Chloral Hydrate - 3.8 15-6 1 Formed by the reaction with chlorine disinfectant Total Organic Halogen 113 78--155 Formed by the reaction with chlorine disini Cyanogen Chloride 1.7 0,5-2,3 Formed by the reaction with chlorine disinfectant The Information Collection Rule(ICR)b e during d national monitoring programI adhe res It of by the Uil EmironmeEPA Protection ng man The primary purpose of the KR is to gather next 5 ye occurrence data on chemicals wh'¢h may be formed during drinking water disinfection. The results of tM1e ICR will assist the EPA in regulating marry of these disinfection byyroducts arer the next years. ppb=parts-per-billion. \ ; c � 9 { \ � { \ $ $ ` - ■ e � my HUM �\ _ cc } �m } \ w g / \ ) \ \ / \ \ y . . # w � { 2 ° r � . . . . . . The 2002 Water Quality Report Drinking Water (Quality If yrnt have questions, Since 1991, California water utilities have been providing please contact us,for answers... an annual Water Quality Report to their customers. This year's report covers calendar year 2001 water For information about this report, or your water quality testing, and has been prepared in compliance quality in general, please contact Art Valenzuela with new regulations called for in the 1996 reauthorization at(714) 573-3382. The Tustin City Council meets of the Safe Drinking Water Act. The reauthorization the first and third Mondays of every month at charged the United States Environmental Protection Agency (EPA) with updating and strengthening the tap 7:00 pm in the City Council Chambers, 300 water regulatory program and changed the report's due Centennial Way, Tustin, California. Please feel date to July 1. free to participate in these meetings. EPA and the California Department of Health Services For more information about the health effects of (DHS) are the agencies responsible for establishing the listed contaminants in the following tables, drinking water quality standards. To ensure that your call the Environmental Protection Agency hotline tap water is safe to drink, EPA and DHS prescribe at (800) 4264791. regulations that limit the amount of certain contami- nants in water provided by public water systems. DHS regulations also establish limits for contaminants in bottled water that must provide the same protection for The City of Tustin vigilantly safeguards its water supply public health. The federal Food and Drug Admini- and, as in years past, the water delivered to your home stration (FDA) also sets regulations for bottled water. meets the standards required by the state and federal regulatory agencies. In some cases, your local utility goes beyond what is required to monitor for additional contaminants that have known health risks. For I' example, the Orange County Water District, which manages our groundwater basin, monitors our groundwater for Methyl Tertiary Butyl Ether (MTBE). Unregulated contaminant monitoring helps EPA Ff ` determine where certain contaminants occur and whether it needs to establish regulations for those contaminants. fldiR This information is important.Have someone translate it for you. t%tRRtikl.-C<>`' bi, Esta infonnad6n es impodante.Por fam pidale a alguien qua as la taduzu. �iC��a iM1 {i ' L 9p i`(._ ;t Ii,d, ` ` Ban b cao nay co nhung nn tuc quart hong ve nuoc usng cua qua vi. aoHay dich ra hoac n6i chuyen viii nhfmg at th6ng hi6u s .. What You Need to Know, Au(d How it .May Affect You Sources of Supply Government Keg>ulutions Your drinking water is a blend of surface water imported by Of Pf)tenttftt GOtltttJYt'lttCtttt5 the Metropolitan Water District of Southern California, and Drinking water, including bottled water, may be reasonably groundwater pumped from the Santa Ana River basin. expected to contain at least small amounts of some Metropolitan's imported water sources are the Colorado River contaminants. As water travels over the surface of the land or and the State Water Project, which draws water from the San through the layers of the ground, it dissolves naturally Francisco-San Joaquin Bay Delta. Your groundwater comes occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of from a basin that stretches from Prado Dam and fans across human or animal activity. For most people, the presence of the northwestern portion of Orange County, excluding the contaminants does not necessarily mean water may be a communities of Brea and La Habra, and stretching as far health risk. south as the EI Toro Y. Contaminants that may be present in source water include: The City of Tustin currently utilizes 12 groundwater wells, ® Microbial contaminants, such as viruses and bacteria, (Beneta, Columbus Tustin, Main Street#3 and#4, Newport, which may come from sewage treatment plants, septic Prospect, 17th Street#1 and#2,Tustin, Vandenberg,Walnut systems, agricultural livestock operations and wildlife. and Yorba). ♦ 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 farting. Sierra Nevada Range State Water Project .qr Well-Waxer" 5Tanke `_" _t__ Treatment Facility '''_ ,j RI° x.:., +vl. .G' .�.�.�•- r"'{. Colorado " Water Treatment River • '�•+'` � � ,.,,. Plant Underground Aquifer to E ti 9y' y/ ' i v^ v.. Al y� } 41, �" d ."„ii /Uustratiwn by Kathy Eames & Radioactive contaminants, which can be naturally The maximum amount of total THMs allowed in drinking occurring or be the result of oil and gas production or water is regulated by the U.S. EPA, which set a maximum mining activities. annual average limit in drinking water of 100 parts per billion e Pesticides and herbicides, which may come from a variety in 1979. Effective in January 2002, the Stage 1 Disinfectants/ of sources such as agriculture, urban storm water runoff, Disinfection Byproducts Rule revises the total THM maximum and residential uses. annual average level at 80 parts per billion. Your drinking A Organic chemical contaminants, including synthetic and water complies with the Stage 1 Disinfectants/Disinfection volatile organic chemicals, which are by-products of Byproducts Rule (see the average THM value in the accom- industrial processes and petroleum production, and can panying table). EPA is currently crafting a Stage 2 regulation also come from gasoline stations, urban storm water that will further reduce allowable levels in drinking water. runoff and septic systems. Nitrate Ctyptosporidiurn The City of Tustin provides treatment or blending to reduce Cryptosporidium is a microscopic organism that, when the levels of Nitrate that it delivers to its customers. Daily water samples are collected to ensure that the level of Nitrate ingested, can cause diarrhea, fever, and other gastrointestinal symptoms. The organism comes from animal and/or human does not exceed the Health Department recommended level of 40 wastes and may be in surface water. The Metropolitan Water District of Southern California, which did not detect it in the 12.8-277.5.5 The 2001 average was 20.4 mg/L with a range of mg/L. m water, tested your surface water for CryptoVondium in 2001. Nitrate in drinking water at levels above 45 mg/L is a health If it ever is detected, Cryptosporidium is eliminated by an risk for infants of less than six months of age. High nitrate effective treatment combination including sedimentation, levels in drinking water interfere with the capacity of the filtration and disinfection. infant's blood to carry oxygen, resulting in serious illness; symptoms include shortness of breath and blueness of the Zmmhcno-Eomprolnised people skin. High nitrate levels may also affect the ability of the Some people may be more vulnerable to constituents in the blood to carry oxygen in other individuals, such as pregnant water than the general population. Immuno-compromised women and those with certain specific enzyme deficiencies. people, such as those with cancer who are undergoing Nitrate levels may rise quickly for short periods of time chemotherapy, persons who have had organ transplants, because of rainfall or agricultural activity. If you are caring for people with HN/AIDS or other immune system disorders, an infant, you should ask advice from your health care some elderly persons and infants can be particularly at risk of provider, or choose to use bottled water for mixing formula infections. These people should seek advice about drinking and juice for your baby. If you are pregnant, you should water from their healthcare providers. drink bottled water. The EPA and the federal Centers for Disease Control guidelines Arsenic on appropriate means to lessen the risk of infection by Crypto- Arsenic is an element that occurs in the earth's crust. sporidium and other microbial contaminants are available from Accordingly, there are natural sources of exposure. Exposure EPA's safe drinking water hotline at(800)426-4791 between to arsenic at high levels can pose serious health effects, as it 9 a.m. and 5 p.m. Eastern Time(6 a.m. to 2 p.m. in California). is a known human carcinogen. In addition, it has been 7- iffialOn7ethanes And Disinfection reported to affect the vascular system and has been Trihalomethanes (THMs) are chemical byproducts of associated with the development of diabetes. EPA established a maximum contaminant level for arsenic of 50 parts per disinfecting drinking water. THMs are a group of four billion in 1975. In January 2002, EPA finalized a new standard chemicals that are formed when chlorine reacts with naturally for arsenic in drinking water that requires public water occurring organic and inorganic matter in water. The supplies to reduce arsenic to 10 parts per billion by 2006. trihalomethanes are chloroform, bromodichloromethane, Groundwater and imported water supplies in Tustin generally dibromochloromethane, and bromoform. range between non-detectable levels and 5.1 parts per billion. Chlorine disinfection has almost completely eliminated from our lives the risks of microbial waterborne diseases such as bead typhoid fever, cholera, and dysentery. However, the health Infants and young children typically are more vulnerable to benefit of chlorination has introduced some possible risks lead in drinking water than the general population. It is from THMs. Some scientific studies have linked THMs to possible that lead levels at your home may be higher than at increased risk of cancer. Other studies have linked THMs to other homes in the community as a result of materials used reproductive problems, including miscarriage. A California in your home's plumbing. If you are concerned about study released in 1998 found an increase in miscarriage rate possible elevated lead levels in your home's water, you may for women who drank 5 or more glasses of cold water wish to have your water tested by an independent laboratory containing more than 75 parts-per-billion total THMs. State or flush your tap for 30 seconds to 2 minutes before using and federal officials have cautioned that this study in not the water. Additional information is available from the Safe definitive and further investigation is now underway. Drinking Water Hotline at(800) 426-4791. City of Tustin Groundwater Quality PING Average Range of MCL Most Recent Typical Source Chemical MCL (MCLG) Amount Detections Violation? Sampling Date of Contaminant Radioiogicais Alpha Radiation(pCi/L) 15 mile 2.0 1.1 -3.7 No 1998 Erosion of Natural Deposits Inorganic Chemicals Aluminum( m) __ 1/0.2' 0,6 0.06 NO 0.53 No _2001 __Erosion of Natural Deposits Arsemc(pp ` 50 mile Y9`" ND 5.1 "`No 2001 Eroslon of Natural Deposits Banum(ppm) - i n/a - <01 "" ND 0._13 No -2061 Eroslon of Natural Deposits" Fluoride(ppm) 2 1 0 14 0 11 6.24 No 2001 Erosion of Natural Deposits Mercury(ppb) .... 2 1 2 <61 ND f5 no` 2001 Erosion of Natural Deposits Nitrate(ppm as NOa) 45 45 26 73 29" No 2061 tertilizers,Se-,1b nks _ Nitrate+Nitree(ppm as N) 10 mita 4.6_ 2 9-6.2 No 2001 Fertilizers,Se-pvc Tanks Selenium 50 (50)" <5 Nb-6.2 No 20b1 Eroslon ofNatural Deposits Secondary Standards' Chloride(ppm) 500" n/a 84 54-124 No 2001 _ Erosion of Natural Deposits Iron(pb) 300' na <10 0 No 296 No 2601 Eroslon of Natural Deposits Specific-Conductance(pmho/cm) 1,600'' n/a 848 718-:1-1070 No 2061 "'" Emslan of Natural7Seposits Sulfate(ppm) 500` n/a 120 44-146No` 2001 Erosion 6f Natural Deposits Total Dissolved solids(ppmi 1,060' nla 548 426-74'6` No 2001 Eroslon of Natural Deposits Unregulated Contaminants Requiring Monitoring Boron(ppm) Not Regulated n/a _ <0.1 ND-0.15 nst 2001 Erosion of Natural Deposits Calaum(ppm) __,_ Not Requlated nfa.,,_ 75 33-132 ola 2001 "" torsions Natural be osis P _ Ma nesium(ppm) Not Regulated nla 15 4 4 31 mile 2001 Erosmn ofNatural Deposits ppH�pH units) Not Regulated nla' 7 9 7 7-8=1 ma 2001 €rosron of Natural bepoons Potasswrn(ppml Not Regulated n/a 2 q 1.8--_11 " n/a ND Eroslon of Natural Deposes Sodium(ppm) Not Regulated No 73 50 98 mile -_2001 Erosion of Natural Deposes Tota(TotalAlkalimty as CaCaa(ppm) Not Regulated Na 166 144 194 n/a _2661 Erosion of Natural Deposits 6 Not Regulated n/a 15 ND- 7 n/a 2001 Erosion of Natural Deposits g g pp Regulated Not a 2001 Erosion of Natural Deposits Vat adiu��(pP)sea miss/C�CDallon)m) N t Regular d n/a 4.9 1 O6 27 9 n/a 2001 Erosion of Natural Deposits ppb=parls-per-billlon;ppm=parts per million;pCVL=fico curies per liter,nim=nephelometric turbidity units;ND=not detected;no=not applicable,MCL=Maximum Contaminant Level;(MCLG)=federal MCL Goal; PHG=California Public Health Goal;<=less than 'Contaminant is regulated by a secondary standard to maintain aesthetic qualities(taste,edea mlo0. City of Tustin Water District Distribution System Water Quality Primary MCL Average Amount Range of Detections MCL Violation? Typical Source of Contaminant Total Triolomethanes(ppb)_ 100 17 ND-43 No _ Byproducts of chlorine disinfection Tun ity(niu) -..____ _._5.,... ,_......._.._ 016 .-€rosf000TnaturaTdeposlti. ____ Eight locations in the distribution s system are[erred quarterly for rota)aesthetic qualmes bas twenty locations are tested monthly for color,odor and turbidity. 'Contaminant Is regulated by a secondary standard to maintain aesMe[ic qualities{taste,odor, for); In=nephelometric turbidity units;ND=not detected Lead and Copper Action Levels at Residential Taps Action Level Health Both Percentile Sites Exceeding AL 7 AL (AL) Goal Value Number of Sites Violation? Typical Source of Contaminant Lead(ppb) 15 2 2 0/45 No Corrosion of household plumbing _ Copper(ppm) ""13 - 0.17 0.62 _::0145 -„, No ”' Corrosion of household plumbing Lead and copper samples were collected from selected residences in September 2000 A regulatory anion level is the concentration of a contaminant which,if exceeded,Viggers treatment or other requirements which a water system must follow. Definitiorm I'nblic Health goal (PHG) Primary DrinkinWater Standard (PIANS) Mies arements The level of a contaminant in drinking water below MCL's for contaminants at affect health along with their monitoring Water is sampled and tested throughout the year. which there is no known or ex cted risk to health. and reporting requirements,and water treatment requirements. Contaminants are measured in parts per million Public health goalsamsetby fhe California Treatment'I'ccfmigase (ppm),parts per billion(ppb),parts per Muton Environmental Protection Agency. A required process intended to reduce the level of:a contaminant in ppt),and even parts per quadrillion(ppq).If this M1Ltrinnnn Coolmtinant Level Gual (MCll drinkingwatec is difficult to imagine,think about these The level of contaminant in drinking water below which. Regulatory Action Level comparisons: there E no known or a risk to health.Maximum I, Parts per millirm: xPectd The concentration of a contaminant which,if exceeded,tri em contaminant level goals are set by the EPA 3 drops in 42 gallons treatment or other requirements which a water system mus ollow. 1 second in 12 days Maximum elof a:unioanC Level (MCL) Variance S ]penny in$10,000 The highest level of a contaminant that is allowed in State or EPA permission not to meet an MCL or a treatment 1 inch in 16 miles drinking water d ma are set as close to the public technique under certain conditions. parts(ler billion: health goals and maximum contaminant level goals as S 1 dr m 14,000 gallons is economically and technologically feasible.Secondary drop MCIs are set to protect the odor,taste and appearance of 9 1 second in 32 years drinkingwater. Er 1 penny in$10 million %lie State allows us to monitor for some contaminants less than L; t inch in 16,0(10 miles Helton Leval advisory le once er ear because the coisim rattans o these contaminants Health-based advisory levels established by the State p y f Hi u importantof ewe,6aunxr,tow wen a small Ile ar[ment of Health Services for chemicals that lack do not change frayuently.Some of our data,though cmwmdWion oJcertain contaminants um advwsAy MLP1a'. representative,am more than one year old. affect a watersttnply. Metropolitan Water District of Southern California Treated Surface Water PHG,or Average Range of MCL Typical Source Chemical MCL (MCLG) Amount Detections Violation? of Contaminant Radiologicais-Tested in 1999 Alpha Radiation(pCUL) 15 n/a 3.6 1.2-6D No Erosion of natural deposits Beta Radiation(pCi/L) 50 n/a 6.2 5.2-7.8 - No Decay of man-made or natural deposits Combined Radium 5 n/a 0.6 ND-1.5 No Erosion of natural deposits .__._. ___..-__. ------ _____ __.. .._. Uranium 1 - 20 0.5 2.6 ND-3.8 No Erosion of natural deposits Organic Chemicals-Tested in 2001 ________._ _.__-.___._._ _..... _<3 ___ND ______ ..___.._.-._.-._ -..__..__.-- MTBE(ppb) 13 13 <3 ND 07 No Gasoline additive Toluene(ppb) 150 150 <0.5 ND-4.0 No Industrial solvent Inorganic Chemicals-Tested in 2001 Alum . --------- ------- ....._ _-0.. _.__-__-.- -_-__duce____-___--_ Aluminum(ppm) 1 0.6 0.141 0.096-0.200 No Residue from water treatment process Arsenic(ppb) 50 n/a <2 ND-2.4 No Erosion of natural deposits .....__ ..__ .....__. _ ......._...... .. ......_,...... cosi._. .. ._._..._.._._, ........... Fluonde(ppm) 2 1 0.22 0.19�0.2 4 No Erosion of natural deposits Nitrate as N(ppm) 10 10 <0.45 ND-0.56 No Agriculture runoff and sewage Secondary Standards'-Tested in 2001 Aluminum(ppm) 0.2" Na 0.141 0.096-0.200 No Residue from water treatment process Chloride(ppm) 500` n/a 78 72-83 No Runoff or leaching from natural deposits Color(color units) - 15' n/a 1 1 -2 No Runoff or leaching from natural deposits MTBE(ppb) 13' n/a <3 ND 0 7 No Gasoline additive Specific Conductance(pmha/cm) 1,600' n/a 832 779-884 No Substances that farm Ions in water Sulfate(ppm) - 500` n/a 177 155-194 No - Runoff or leaching of natural deposits Total Dissolved Solids(ppm) 1,000` n/a 498 464-530 No Runoff or leaching of natural deposits .___,___.... ._.......... .... _.. _._..._. -- _. _ Turbidity(ntu) 5' n/a 0.06 0.05-0.07 No Runoff or leaching of natural deposits Unregulated Chemicals Tested in 2001 .__duce_lin_____ _................ .._.. Alkaty(ppm) Not Regulated n/a 113 107-122 nla Runoff or leaching from natural deposits Boron(ppb) Not Regulated 1 130 120-13D n/a Runoff or leaching from natural deposits Calcium(ppm) Not Regulated n/a 56 53-61 n/a Runoff or leaching from natural deposits -_-____. _._ -_-_. -- magnesium --_. l _-tu -. Magnesium(ppm) Not Regulated n/a 24 21-25 nla Runoff or leaching from natural deposits _ _u n/a _N __.. Perchlorate(ppb) Not Regulated n/a 4 ND-5 n/a Racket fuel discharged to the Colorado River Potassium(ppm) Not Regulated n/a 3.9 3.5-4.2 n/a Runoff or leaching from natural deposits Sodium(ppm) Not Regulated n/a 78 74 83 not Runoff or leaching from natural deposits Hardness(ppm) Not Regulated n/a 237 219-255 paRunot or leaching of natural deposits _. _... _ __. __- _... duce. Hardness(grains/gap Not Regulated n/a n1a 14 13-15 n/a Runoff or leaching of natural deposits Vanadium(ppb) Nat Regulated its 3 3 nla Runoff or leaching of natural deposits ppb=pans-per-billion,ppm=pans-per-million,ii=pim cones per lifer;mu=nephelometric turbidity units,ND=not detected,<=less than;MCL=Maximum Contaminant Level;(MCLG)=federal MCL Goal, PHG=California Public Health Goal;We=not applicable. 'Comenunant is regulated by a secondary standard to maintain aesMetie qualities(taste,odor,color) Turbidity-combined filter effluent Treatment Technique Turbidity Measurements TT Violation? Typical Source of Contaminant 1)Highest single turbidity measurement 0.5 NTU 0.2 No Soil run-off . -.--. --_. ........ 2)Percentage of samples less than 0.5 NTU 95% 100 No Sail run-off duce___ Turbidity is lt measure of the treatment to the water ani treatment of particulate is mortar,some of which mighto duchreduce harmful l of contaminants stsow turbidity m Methal are if treated water Is mgood impossible of effective measure filtration Filtration Is called a treatment techn qua 01).A treatment technique is a required Process intended m reduce the level of contaminants in drinking water that are difficult and sometimes impossible to measure dvectly. Information Collection Rule Disinfection By-Products in Metropolitan Water District Finished Water Data Collected August 1997 - December 1998 Chemical Average Amount(ppb) Range of Detections(ppb) Typical Source of Contaminant Disinfection By-products Haloacetic Acids 17 9.5-24 Formed by the reaction with chlorine disinfectant -_-. --._ -_ --. _. -... Haloacetonitriles 7.6 5.1-11 Formed by the reaction with chlorine disinfectant Haloketones - 1.7 0.7-2.7 Formed by the reaction with chlorine disinfectant Chloral Hydrate 3.8 1.5-6.1 Formed by the reaction with chlorine disinfectant ------------- Total Organic Halogen 113 _.. 76-155 Formed by the reaction with chlorine disinfectant Cyanogen Chloride 1.7 0.5-2.3 Formed by the reaction with chlorine disinfectant total Chlorine Residual2.5 ppm 2.1-2.9 ppm Disinfectant residual The Information Collection Rule dCR)is a multeyear national monitoring program administered by the Us Environmental Protection Agency The primary purpose of the ICN is to gather nationwide occurrence data on chemicals which may be formed during drinking water disinfection.The results of the ICA will assist the EPA in regulating many of these disinfection by-products over the next 5 years. pied=pars-perbillim,ppm=pans per-million,ND=not defaced. 'Chlorine residuals are for the treatment plant effluent during 2001.