TO: HONORABLE MAYOR FROM: Kerrie Romanow
AND CITY COUNCIL
SUBJECT: SEE BELOW DATE: August 8, 2022
Approved Date
8/17/2022
COUNCIL DISTRICT: 2, 7, 8
SUBJECT: SAN JOSE MUNICIPAL WATER SYSTEM’S 2022 PUBLIC HEALTH
GOALS REPORT ON WATER QUALITY
RECOMMENDATION
(a) Conduct a public hearing for the purpose of accepting and responding to public comment regarding the San José Municipal Water System’s 2022 Public Health Goals Report on water quality as required by the California Health and Safety Code. (b) Approve the San José Municipal Water System’s 20 22 Public Health Goals Report and direct staff to file the report with the State Water Resources Control Board.
OUTCOME
Approval of the recommendation will fulfill the requirements of the California Health and Safety Code.
BACKGROUND
California Health and Safety Code (Health and Safety Code), section 1164701, requires all California water retailers who provide more than 10,000 service connections prepare a report every three years informing consumers of water quality contaminants that exceeded state- adopted Public Health Goals (PHG). PHGs are non-enforceable water quality goals established by the California Office of Environmental Health Hazard Assessment and are based solely on public health risk considerations. Where there is no PHG for a specific contaminant, retailers are required to use Maximum Contaminant Level Goals (MCLG), established by the United States Environmental Protection Agency (USEPA) for reporting purposes.
1 Chapter 4 of the Health and Safety Code beginning with section 116450 and including section 116470 is known as the “California Safe Drinking Water Act.”
COUNCIL AGENDA: 8/30/22
FILE:
ITEM:
22-1284
6.2 HONORABLE MAYOR AND CITY COUNCIL
August 8, 2022
Subject: 2022 Public Health Goals Report on Water Quality
In setting the PHG/MCLGs, the California Office of Environmental Health Hazard Assessment and USEPA do not take into account any of the practical risk-management factors which are considered by the USEPA and the State Water Resources Control Board when setting drinking water standards such as Maximum Contaminant Levels (MCLs). MCLs are the highest level of a contaminant that is allowed in drinking water. When setting an MCL, the USEPA and the State Water Resources Control Board consider factors such as analytical detection capability, available treatment technologies, benefits, and costs. PHG/MCLGs are typically set at values lower than the corresponding MCLs.
The Health and Safety Code also requires that public water systems hold a public hearing for the purpose of accepting and responding to public comment on the report, which may be done as part of a regularly scheduled meeting. The PHG report is now being presented to City Council to satisfy the public hearing requirements and to obtain City Council approval of the report before submitting to the State Water Resources Control Board.
ANALYSIS
Since 1998 San José Municipal Water System (SJMWS) has prepared a PHG report every three years in compliance with Health and Safety Code requirements. The report represents an analysis of drinking water quality data that has been collected over the past three years. The 2022 Public Health Goals Report on Water Quality (see attached) covers data collected from 2019 through 2021 in the Evergreen, Edenvale, and Coyote Valley service areas. Since the North San José/Alviso service area has less than 10,000 service connections and is individually permitted by the state, a PHG report is not required for this service area. SJMWS reports that at this time its water supply meets all primary drinking water standards set by the state and federal governments to protect public health.
The PHG report satisfies the Health and Safety Code requirements by presenting the following information:
• Contaminants identified in the local water supply that exceeded the PHG or MCLG during the past three years;
• Numerical public health risk associated with the maximum contaminant level and the PHG for each contaminant identified in exceedance;
• Public health risk categories and definitions of these categories for the contaminants identified in excess of the PHG or MCLG;
• The Best Available Technology to remove or reduce the concentration of the identified contaminants, if any;
• Recommended action for reduction of contaminants exceeding PHGs and basis for that decision.
Two contaminants were detected at levels above the applicable PHG/MCLG between 2019 and 2021: arsenic and bromate. Although no follow up action is required for these readings, further information is provided.
HONORABLE MAYOR AND CITY COUNCIL
August 8, 2022
Subject: 2022 Public Health Goals Report on Water Quality
Arsenic is a naturally occurring metallic element found in water due to the erosion of mineral deposits. The PHG for arsenic is 0.004 micrograms per liter (ug/L), and at the present time there are no laboratory methods available that can reliably measure arsenic as low as the PHG.
Several inorganic chemical analyses were performed between 2019-2021 as part of routine monitoring, and the groundwater well sources tested in the Evergreen, Edenvale, and Coyote Valley service area exceeded the arsenic PHG. The highest detected level was 2.7 ug/L, which is less than half the MCL of 10 ug/L. No follow up action is required or proposed at this time.
Bromate is formed when naturally occurring bromide reacts with ozone during the disinfection process of surface water supplies. This disinfection is done by the wholesale water provider, Valley Water. In 2020 and 2021, bromate was detected at the two Valley Water treatment plants that supply the Evergreen service area. Valley Water staff monitors its raw and treated water supply and continues to optimize treatment for disinfection byproduct control. Detected values were above the PHG, but still below the MCL, and required no follow up action.
To protect public health, SJMWS implements a vigilant monitoring and maintenance program intended to meet state and federal requirements. A complete summary of the detected contaminants and the associated data can be found in the attached 2022 PHG report. No other contaminants were detected at levels above their PHG and/or federal MCLG during this reporting period.
CONCLUSION
A PHG report was completed to comply with the Health and Safety Code, and no further actions are required or recommended at this time. The SJMWS water supply within all service areas continues to meet federal and state drinking water standards.
EVALUATION AND FOLLOW-UP
This report is required to be completed every three years. No additional follow up actions with City Council are expected at this time.
CLIMATE SMART SAN JOSE
The recommendation in this memorandum has no effect on Climate Smart San José energy, water, or mobility goals.
HONORABLE MAYOR AND CITY COUNCIL
August 8, 2022
Subject: 2022 Public Health Goals Report on Water Quality
PUBLIC OUTREACH
A public meeting was held on August 23, 2022 at the SJMWS office to receive public input and comments on the proposed report. A notice of the public meeting was published in the Evergreen Times and San José Post Record. A notice was also posted on the City of San José’s website.
This memorandum will be posted on the City’s Council Agenda website for the August 30, 2022 City Council meeting.
COORDINATION
This report was coordinated with the City Attorney’s Office.
COMMISSION RECOMMENDATION/INPUT
There is no board or commission recommendation or input for this action.
CEQA
Not a Project, File No. PP17-009, Staff Reports, Assessments, Annual Reports, and Informational Memos that involve no approvals of any City action.
/s/
KERRIE ROMANOW
Director, Environmental Services
For questions, please contact Jeffrey Provenzano, Deputy Director, at (408) 277-3671.
Attachment – 2022 Public Health Goals Report on Water Quality PU
BLIC HEALTH GOALS
REPORT ON WATER QUALITY
CIT
Y OF SAN JOSE
MUNICIPAL WATER SYSTEM
(EVERGREEN, EDENVALE, AND COYOTE)
System No. 4310020
JUNE 2022
City of San Jose
Environmental Services Department
ATTACHMENT
SAN JOSE MUNICIPAL WATER SYSTEM
PUBLIC HEALTH GOALS REPORT ON WATER QUALITY
TABLE OF CONTENTS
SECTION 1: BACKGROUND INFORMATION
WHAT ARE PUBLIC HEALTH GOALS (PHGS)? ......................................................................................1 REPORTING REQUIREMENTS ..................................................................................................................1 WATER QUALITY DATA CONSIDERED ...................................................................................................1 GUIDELINES FOLLOWED ........................................................................................................................1 BEST AVAILABLE TREATMENT TECHNOLOGY AND COST ESTIMATES..................................................2
SECTION 2: CONTAMINANTS DETECTED THAT EXCEED PHGS OR MCLGS
A. Arsenic .............................................................................................................................................2 B. Bromate.…………………………………………………………………………………….………3
ATTACHMENT 1: EXCERPT FROM CALIFORNIA HEALTH & SAFETY CODE SECTION 116470 ...............5 ATTACHMENT 2: CALIFORNIA MCLS & PHGS AND FEDERAL MCLGS ...............................................6
SECTION 1: BACKGROUND INFORMATION
WHAT ARE PUBLIC HEALTH GOALS (PHGS)?
PHGs are water qualit y goa ls establish ed by the California Office of Environmental Health Hazard Assessment (OEHHA) and are based solely on public health risk considerations. In setting the PHGs, OEHHA does not take into account any of the practical risk- management factors which are considered by the United States Env ironmental Protection Agency (USEPA) and the State Water Resources Control Board (SWRCB) when setting drinking water standards such as Maximum Contaminant Levels (MCLs), including factors such as analytical detection capability, treatment technology available, benefits and costs.
PHGs are typically set at values lower than the corresponding MCLs. PHGs are non- enforceable and are not required to be met by public water systems under the California Health and Safety Code . Maximum Contaminant Level Goals (MCLGs), established by USEPA, are the federal equivalent to PHGs.
REPORTING REQUIREMENTS:
Provisions of the California Health and Safety Code §116470(b) (see Attachment 1) specify that public water systems serving more than 10,000 service connections must prepare a special report if their water quality measurements have exceeded any PHGs . Reporting must be done every three years. The law also requires that where OEHHA has not adopted a PHG for a contaminant , the wa ter suppliers are to use the MCLGs adopted by USEPA.
The purpose of this report is to inform consumers of contaminants in San José Municipal Water System’s (SJMWS) drinking water that exceeded the PHGs or MCLGs during 2019, 2020, and 2021. Included in this PHG r eport is the numerical public he alth risk associated with the Maximum Contaminant Level (MCL) and the PHG or MCLG, the category or type of risk to health that could be associated with each contaminant, the best treatment technology available that could be used to reduce the contaminant level, and an estimate of the cost to install that treatment if it is appropriate and feasible. For general information about the quality of the water delivered by SJMWS, please refer to the latest Annual Water Quality Report that was prepared in June 2022. The report can be found online at www.sjenvironment.org/waterquality.
WATER QUALITY DATA CONSIDERED:
The water quality data collected by SJMWS and by SJMWS’s water suppliers between 2019 and 20 21 were considered f or the purpose of determining complia nce w ith drinking water standards a nd PHG reporting requirements (see Attachment 2) . This data was all summarized in SJMWS’s Annual Water Quality Report that were made available on SJMWS’s website. Postcards were mailed to all customers with a QR code to S JMWS’s website and information on how to request a hard copy of the Annual Water Quality Report, if preferred.
For each regulated contaminant, SWRCB establishes Detection Limits for Purposes of Reporting (DLR).
DLRs are the minimum levels at which any analytical re sult must be reported to SWRCB. Analytical results below the DLRs cannot be qua ntified with any certainty. A constituent is “detected” when measured concentrations are above the DLR. In some cases, PHGs are set below the DLR.
GUIDELINES FOLLOWED:
The Association of California Water Agencies (ACWA) formed a workgroup which pre pared guidelines for water utilities to use in preparing these PHG reports. ACWA guidelines were used in the preparation of this report. No formal guidance was available from state regulatory agencies.
BEST AVAILABLE TREATMENT TECHNOLOGY AND COST ESTIMATES:
Both USEPA and SWRCB adopted Best Available Technologies (BATs), which are the best known methods of reducing contaminant levels to the MCL. However, since many PHGs and MCLGs are set much lower than the MCL, it is not always possible or feasible to deter mine what treatment is needed to further reduce a contaminant to or below the PHG or MCLG. Where the MCLG or PHG is set at zero, there may not be commercially a vailable technology available to reach that level. Estimating the costs to reduce a contaminant to zero is difficult, if not impossible because it is not possible to verify by analytical means that the level has been lowered to zero. In some cases, install ing treatment to try and further reduce very low levels of one contaminant may have adverse effects on other aspects of water quality.
SECTION 2: CONTAMINANTS DETECTED THAT EXCEED PHGS OR MCLGS
The following is a discussion of the constituents that were detected in one or more of our drinking water sources at levels above the PHG, or if no PHG, a bove the MCLG. The two contaminants th at were detected at levels above the applicable PHGs or MCLGs between 2019 and 2021 are:
Table 1: Constituents Detected Above PHG or MCLG (2019-2021) Contaminant Unit
CA
MCL DLR PHG MCLG
SJMWS
Levels
Arsenic ug/L 10 2 0.004 0 ND – 2.7
Bromate ug/L 10 1 0.1 0 ND – 7.9*
* Valley Water treated surface water data
ug/L = micrograms per liter
ND = Not Detected
A. ARS
ENIC
Arsenic is a naturally occurring metallic element found in water due to the erosion of mineral deposits. It can also enter water supplies from runoff from agricultural and industrial activities. Arsenic, categorized as an inorganic chemical, is a toxic chemical element that is unevenly distributed in the Earth’s crus t in soil, rocks, and minerals. According to the SWRCB, arsenic is ubiquitous in nature and is commonly found in drinking water sources in California.
The PHG for arsenic is 0.004 ug/L. The federal and state MCL for arsenic is 10 ug/L (the federal MCLG is 0 ug/L). The DLR for arsenic is 2 ug/L , and at the presen t time there are no laboratory methods available that can reliably measure arsenic to levels as low as the PHG.
SJMWS Results
Arsenic was below the MCL in all of SJMWS’s water sources at all times during the period covered in this report. Several inorganic chemical analyses were perf ormed between 2019-2021 as part of routine monitoring, and the groundwater well sources tested in the Evergreen, Edenvale and Coyote service area exceeded the arsenic PHG. The highest detected level was 2.7 ug/L, which is less than half the MCL of 10 ug/L.
Health Risk Category and Level
According to OEHHA, ingestion of arsenic can pose a risk of cancer. The health risk category associated with arsenic is carcinogenicity. The PHG is based on a level that will res ult in not more than 1 excess cancer in 1 million people who drink 2 liters daily for 70 years.
Arsenic can also result in a number of non-cancer effects at higher levels of exposure (e.g., vascular effects or skin effects), but the cancer risk is the mos t sensitive endpoint, and the basis of the PHG. Although short-term exp osures to high doses cause adverse effects in people, su ch exposures do not occur from public water supplies in the U.S. that comply with the arsenic MCL.
Best Available Technology
The SWRCB has identified the following trea tment technologies as Best Ava ilable Technology, treatment techniques, or other means available for achieving compliance with the MCL:
• Activated Alumina
• Coagulation/Filtration
• Ion Exchange
• Lime Softening
• Reverse Osmosis
• Electrodialysis
• Oxidation/Filtration
Note that BATs are designed for treatment to achieve compliance with the corresponding MCL only, and not PHGs. It is unlikely that arsenic will be removed to a level lower than the PHG. The PHG level is lower than laboratory tests can detect, so it would be impossible to confirm if any source water has actually reached levels below the PHG after treatment. SJMWS does not own or operate a water treatment facility and therefore cannot provide an exact cost estimate to treat arsenic.
Recommendation
SJMWS will continue to monitor and protect water sources, as required by state and federal regulations. In the event that arsenic levels exceed the MCL, SJMWS will coordinate with the SWRCB to ide ntify solutions for removing or reducing arsenic levels in the water. No further action is proposed at this time.
B. BROMATE
Bromate is not commonly found in water, but it can be formed as a byproduct of ozonation disinfection of drinking water, or as a byproduct from treatment of water with concentrated hypochlorite. It is formed when naturally occurring bromide reacts with ozone during the disinfe ction process. SJMWS purchases treated surface water from Valley Water and delivers it to its Evergreen customers. Since 2006, Valley Water has used ozone as the primary disinfectant. Ozone disinfe ction is highly effective at inactivating microbial contamination and creates fewer disinfection by-products than chlorine.
The MCL for bromate is 10 ug/L, with a PHG of 0.1 ug/L . Th e DLR for bromate is 1 ug/L, and at the present time there are no laboratory methods available that can reliably measure bromate to levels as low as the PHG.
SJMWS Results
The reported bromate data found in Table 1 is from the 2020 and 2021 w ater quality dat a fro m Valley Water’s two water treatment plants that serve the Evergreen service area. Valley Water had detected levels of bromate ranging from non-detected to 7.9 ug/L.
Health Risk Category and Level
The category of health risk for brom ate is carcinogenicity as it is capable of producing cancer. OEHHA has determined that the n umerical health risk associated with concentrations at the PHG is equivalent to one excess case of cancer in 1,000,000 people.
Best Available Technology
The BAT for bromate reduction includes:
• Maintain watershed protection
• Optimize ozone dosage control at the water treatment plant • Continue bromide monitoring of raw water supply to water treatment plants • Reverse osmosis (RO)
RO treatment reduces the naturally -occurring bromide in source water by reducing the natural organic matter in water. When this is reduced, the demand for ozone decreases, therefore reducing bromate formation. Because the DLR for bromate (1 ug/L) is greater than the PHG (0.1 ug/L), it would be difficult to assess the effectiveness of RO treatment on reaching the PHG level. SJMWS does not own or operate a water treatment facility and therefore cannot provide an exact cost estimate to treat bromate.
Recommendation
Valley Water staff monitors its raw and treated water supply and continues to opti mize treatment for disinfection byproduct control. Detected bromate levels are well below the state and federal MCL.
However, if an MCL vi olation occurs, SJMWS will coordinate with Valley Water and the SWRCB to identify solutions for removing or reducing bromate in the water. No further action is proposed at this time.
For more information on health risks: The a dverse health effects for each chemical with a PHG are summarized in a PHG technical support document. These documents are available on the O EHHA web site (http://www.oehha.ca.gov). Also, technical fact sheets on most of the chemicals having federal MCLs can be found at http://www.epa.gov/your-drinking-water/table-regulated-drinking-water-contaminants.
ATTACHMENT 1
EXERPT FROM CALIFORNIA HEALTH & SAFETY CODE SECTION 116470
(b) On or before July 1, 1998, and every three years thereafter, public water systems serving more than 10,000 service connections that detect one or more contaminants in drinking water that exceed the applicable public health goal, shall prepare a brief written report in plain language that does all of the following:
(1) Identifies each contaminant detected in drinking water that exceeds the applicable public health goal.
(2) Discloses the numerical public health risk, determined by the office, associated with the maximum contaminant level for each contaminant identified in paragraph (1) and the numerical public health risk determined by the office associated with the public health goal for that contaminant.
(3) Identifies the category of risk to public health, including, but not limited to, carcinogenic, mutagenic, teratogenic, and acute toxicity, associated with exposure to the contaminant in drinking water, and includes a brief plainly worded description of these terms.
(4) Describes the best available technology, if any is then available on a commercial basis, to remove the contaminant or reduce the concentration of the contaminant. The public water system may, solely at its own discretion, briefly describe actions that have been taken on its own, or by other entities, to prevent the introduction of the contaminant into drinking water supplies.
(5) Estimates the aggregate cost and the cost per customer of utilizing the technology described in paragraph (4), if any, to reduce the concentration of that contaminant in drinking water to a level at or below the public health goal.
(6) Briefly describes what action, if any, the local water purveyor intends to take to reduce the concentration of the contaminant in public drinking water supplies and the basis for that decision.
…
(f) Pending adoption of a public health goal by the Of fice of Environmental Health hazard Assessment pursuant to subdivision (c) of Section 116365, and in lieu thereof, public water systems shall use the national maximum contaminant level goal adopted by the United States Environmental Protection Agency for the corresponding contaminant for purposes of complying with the notice and hearing requirements of this section.
P age 6
ATTACHMENT 2
CALIFORNIA MCLS & PHGS AND FEDERAL MCLGS
PARAMETERS/CONTAMINANTS Units State MCL DLR PHG or
(MCLG)
PHG
EXCEEDED?
INORGANICS
ALUMINUM mg/L 1 0.05 0.6 NO
ANTIMONY mg/L 0.006 0.006 0.02 NO
ARSENIC ug/L 10 2 0.004 YES
ASBESTOS million fibers/L 7 0.2 7 NO
BARIUM mg/L 1 0.1 2 NO
BERYLLIUM mg/L 0.004 0.001 0.001 NO
CADMIUM mg/L 0.005 0.001 0.00004 NO
CHROMIUM mg/L 0.05 0.01 withdrawn NO
COPPER (at-the-tap; 90th percentile) mg/L 1.3 0.05 0.3 NO CYANIDE mg/L 0.15 0.1 0.15 NO
FLUORIDE mg/L 2 0.1 1 NO
LEAD (at-the-tap; 90th percentile) mg/L 0.015 0.005 0.0002 NO MERCURY mg/L 0.002 0.001 0.0012 NO
NICKEL mg/L 0.1 0.01 0.012 NO
NITRATE [as N03] mg/L 45 2 45 NO
NITRATE + NITRITE [as N] mg/L 10 -- 10 NO
NITRITE [as N] mg/L 1 0.4 1 NO
PERCHLORATE mg/L 0.006 0.004 0.006 NO
SELENIUM mg/L 0.05 0.005 (0.05) NO
THALLIUM mg/L 0.002 0.001 0.0001 NO
ORGANIC CHEMICALS
ALACHLOR mg/L 0.002 0.001 0.004 NO
ATRAZINE mg/L 0.001 0.0005 0.00015 NO
BENTAZON mg/L 0.018 0.002 0.2 NO
BENZO (a) PYRENE mg/L 0.0002 0.0001 0.000004 NO
BROMATE ug/L 10 1 0.1 YES
CARBOFURAN mg/L 0.018 0.005 0.0017 NO
CHLORDANE mg/L 0.0001 0.0001 0.00003 NO
CHLORITE ug/L 1 0.02 0.05 NO
2,4-DICHLOROPHENOXYACETIC ACID mg/L 0.07 0.01 0.02 NO
DALAPON mg/L 0.2 0.01 0.79 NO
DIBROMOCHLOROPROPANE [DBCP] mg/L 0.0002 0.00001 0.0000017 NO DI (2-ETHYLHEXYL) ADIPATE mg/L 0.4 0.005 0.2 NO
DI (2-ETHYLHEXYL) PHTHALATE mg/L 0.004 0.003 0.012 NO
DINOSEB mg/L 0.007 0.002 0.014 NO
DIOXIN [2,3,7,8 - TCDD] mg/L 3x10-8 5x10-9 (0) NO
DIQUAT mg/L 0.02 0.004 0.015 NO
ENDOTHALL mg/L 0.1 0.045 0.58 NO
ENDRIN mg/L 0.002 0.0001 0.0018 NO
ETHYLENE DIBROMIDE [EDB] mg/L 0.00005 0.00002 0.00001 NO GLYPHOSATE mg/L 0.7 0.025 0.9 NO
HEPTACHLOR mg/L 0.00001 0.00001 0.000008 NO
HEPTACHLOR EPOXIDE mg/L 0.00001 0.00001 0.000006 NO
HEXACHLOROBENZENE mg/L 0.001 0.0005 0.00003 NO
HEXACHLOROCYCLOPENTADIENE mg/L 0.05 0.001 0.05 NO
LINDANE mg/L 0.0002 0.0002 0.000032 NO
METHOXYCHLOR mg/L 0.03 0.01 0.03 NO
PARAMETERS/CONTAMINANTS Units State MCL DLR PHG or
(MCLG)
PHG
EXCEEDED?
MOLINATE mg/L 0.02 0.002 0.001 NO
OXAMYL mg/L 0.05 0.02 0.026 NO
PENTACHLOROPHENOL mg/L 0.001 0.0002 0.0003 NO
PICLORAM mg/L 0.5 0.001 0.5 NO
POLYCHLORINATED BIPHENYLS [PCBs] mg/L 0.0005 0.0005 0.00009 NO SILVEX [2,4,5-TP] mg/L 0.05 0.001 0.025 NO
SIMAZINE mg/L 0.004 0.004 0.004 NO
THIOBENCARB mg/L 0.07 0.001 0.07 NO
TOXAPHENE mg/L 0.003 0.001 0.00003 NO
BENZENE mg/L 0.001 0.0005 0.00015 NO
CARBON TETRACHLORIDE mg/L 0.0005 0.0005 0.0001 NO
1,2-DICHLOROBENZENE [ORTHO] mg/L 0.6 0.0005 0.6 NO
1,4-DICHLOROBENZENE [PARA] mg/L 0.005 0.0005 0.006 NO
1,1-DICHLOROETHANE [1,1-DCA] mg/L 0.005 0.0005 0.003 NO 1,2-DICHLOROETHANE [1,2-DCA] mg/L 0.0005 0.0005 0.0004 NO 1,1-DICHLOROETHENE [1,1-DCE] mg/L 0.006 0.0005 0.01 NO
CIS-1,2-DICHLOROETHYLENE mg/L 0.006 0.0005 0.1 NO
TRANS-1,2-DICHLOROETHYLENE mg/L 0.01 0.0005 0.06 NO
DICHLOROMETHANE (METHYLENE CHLORIDE) mg/L 0.005 0.0005 0.004 NO 1,2-DICHLOROPROPANE mg/L 0.005 0.0005 0.0005 NO
1,3-DICHLOROPROPENE mg/L 0.0005 0.0005 0.0002 NO
ETHYLBENZENE mg/L 0.3 0.0005 0.3 NO
METHYL TERT BUTYL ETHER (MTBE) mg/l 0.013 0.003 0.013 NO MONOCHLOROBENZENE mg/L 0.07 0.0005 0.2 NO
STYRENE mg/L 0.1 0.0005 (0.1) NO
1,1,2,2-TETRACHLOROETHANE mg/L 0.001 0.0005 0.0001 NO
TETRACHLOROETHYLENE [PCE] mg/L 0.005 0.0005 0.00006 NO
TOLUENE mg/L 0.15 0.0005 0.15 NO
1,2,4-TRICHLOROBENZENE mg/L 0.005 0.0005 0.005 NO
1,1,1-TRICHLOROETHANE [1,1,1-TCA] mg/L 0.2 0.0005 1 NO
1,1,2-TRICHLOROETHANE [1,1,2-TCA] mg/L 0.005 0.0005 0.0003 NO TRICHLOROETHYLENE [TCE] mg/L 0.005 0.0005 0.0017 NO
TRICHLOROFLUOROMETHANE (FREON 11) mg/L 0.15 0.005 0.7 NO TRICHLOROTRIFUOROETHANE (FREON 113) mg/L 1.2 0.01 4 NO
VINYL CHLORIDE mg/L 0.0005 0.0005 0.00005 NO
XYLENES [SUM OF ISOMERS] mg/L 1.75 0.0005 1.8 NO
MICROBIOLOGICAL
CRYPTOSPORIDIUM TT (zero) NO
GIARDIA LAMBLIA TT (zero) NO
LEGIONELLA TT (zero) NO
VIRUSES TT (zero) NO
RADIOLOGICAL
ALPHA ACTIVITY, GROSS pCi/L 15 3 (zero) NO
BETA ACTIVITY, GROSS pCi/L 4 mrem/yr 4 (zero) NO
RADIUM 226 pCi/L -- 1 0.05 NO
RADIUM 228 pCi/L -- 1 0.019 NO
RADIUM 226 + RADIUM 228 pCi/L 5 -- -- NO
STRONTIUM 90 pCi/L 8 2 0.35 NO
TRITIUM pCi/L 20000 1000 400 NO
URANIUM pCi/L 20 1 0.43 NO
Abbreviations: MCL = Maximum Contaminant Level; MCLG = Maximum Contaminant Level Goal; PHG = Public Health Goal; DLR = Detection Limit for purposes of Reporting, set by SWRCB; TT = Treatment Technique