CITY OF SAN JOSE - EVG/EDV/COY Water Quality Report
Serving roughly 101,265 people in Santa Clara County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for CITY OF SAN JOSE - EVG/EDV/COY
1 water provider directly on file, serving roughly 101,265 people in Santa Clara County, California.
Quick answer: CITY OF SAN JOSE - EVG/EDV/COY has no violations on file. One reading is worth knowing about: Perfluorohexanesulfonicacid (PFHxS) was measured at 5.1NG/L, among the highest of the 320 providers on file in this area. It's the most notable figure in this system's record among its 320 local peers.
Lead Summary
Lithium
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluorohexanesulfonicacid (PFHxS)
Perfluoropentanoicacid (PFPEA)
Perfluorobutanoicacid (PFBA)
Perfluoroheptanoicacid (PFHPA)
Perfluorononanoicacid (PFNA)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorodecanoicacid (PFDA)
Perfluorododecanoicacid (PFDOA)
Perfluorohexanoicacid (PFHXA)
Perfluoroundecanoicacid (PFUNA)
11cl-Pf3ouds
9cl-Pf3ons
Adona
Hfpo-Da
Perfluorooctanesulfonicacid6:2fts
Perfluorohexanesulfonicacid4:2fts
Perfluorodecanesulfonicacid8:2fts
Perfluoropfmpa
Perfluoropfmba
Perfluoropfeesa
Nonafluoronfdha
Perfluoropentanesulfonicacid (PFPES)
Perfluoroheptanesulfonicacid (PFHPS)
Chromium, Hex
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dibromoaceticacid
Dichloroaceticacid
Trichloroaceticacid
Utility CITY OF SAN JOSE - EVG/EDV/COYPopulation served 101,265Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Chromium, Hex
Detected: 4.8 UG/L (ppb)
3/4/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 1.3 UG/L (ppb)
7/8/2025
TTHM
Detected: 26.51 UG/L (ppb)
7/8/2025
A group of disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure above the legal limit has been linked to increased cancer risk in some studies.
Chloroform
Detected: 4.19 UG/L (ppb)
7/8/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 6.93 UG/L (ppb)
7/8/2025
Bromodichloromethane
Detected: 6.21 UG/L (ppb)
7/8/2025
Dibromochloromethane
Detected: 9.18 UG/L (ppb)
7/8/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 0.61 MG/L (ppm)
3/11/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 11 µg/L (ppb)
9/12/2023
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Other
Additional substances tested that don't fit neatly into the categories above
Perfluorobutanesulfonicacid (PFBS)
Detected: 2.3 NG/L (ppt)
7/29/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 5.1 NG/L (ppt)
7/29/2025
Perfluoropentanoicacid (PFPEA)
Detected: 2.6 NG/L (ppt)
5/21/2025
Perfluorobutanoicacid (PFBA)
Detected: 13 NG/L (ppt)
5/21/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 14 NG/L (ppt)
5/21/2025
Perfluorononanoicacid (PFNA)
Detected: 15 NG/L (ppt)
5/21/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 16 NG/L (ppt)
5/21/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 21 NG/L (ppt)
5/21/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorodecanoicacid (PFDA)
Detected: 13 NG/L (ppt)
5/21/2025
Perfluorododecanoicacid (PFDOA)
Detected: 12 NG/L (ppt)
5/21/2025
Perfluorohexanoicacid (PFHXA)
Detected: 11 NG/L (ppt)
5/21/2025
Perfluoroundecanoicacid (PFUNA)
Detected: 13 NG/L (ppt)
5/21/2025
11cl-Pf3ouds
Detected: 20 NG/L (ppt)
5/21/2025
9cl-Pf3ons
Detected: 21 NG/L (ppt)
5/21/2025
Adona
Detected: 16 NG/L (ppt)
5/21/2025
Hfpo-Da
Detected: 11 NG/L (ppt)
5/21/2025
Perfluorooctanesulfonicacid6:2fts
Detected: 13 NG/L (ppt)
5/21/2025
Perfluorohexanesulfonicacid4:2fts
Detected: 11 NG/L (ppt)
5/21/2025
Perfluorodecanesulfonicacid8:2fts
Detected: 16 NG/L (ppt)
5/21/2025
Perfluoropfmpa
Detected: 11 NG/L (ppt)
5/21/2025
Perfluoropfmba
Detected: 12 NG/L (ppt)
5/21/2025
Perfluoropfeesa
Detected: 13 NG/L (ppt)
5/21/2025
Nonafluoronfdha
Detected: 8.3 NG/L (ppt)
5/21/2025
Perfluoropentanesulfonicacid (PFPES)
Detected: 9.7 NG/L (ppt)
5/21/2025
Perfluoroheptanesulfonicacid (PFHPS)
Detected: 14 NG/L (ppt)
5/21/2025
Dibromoaceticacid
Detected: 1.3 UG/L (ppb)
7/8/2025
Dichloroaceticacid
Detected: 2.3 UG/L (ppb)
7/8/2025
Trichloroaceticacid
Detected: 1.2 UG/L (ppb)
7/8/2025
Filtration considerations: See the table below for how whole-house carbon, under-sink reverse osmosis, and under-sink carbon systems compare against what's actually on file here. These are general system types, not a specific product recommendation.