City overview · Santa Clara County
PFAS in San Jose, CA
High RiskEPA UCMR 5 tested 5 public water systems serving the San Jose area across 28 ZIP codes. At least one utility serving San Jose has PFAS above the EPA's enforceable limit.
Plain English
01What this means for San Jose
Across the 5 public water systems tested in the San Jose area under EPA UCMR 5, one or more measured a PFAS compound above the federal Maximum Contaminant Level. Contamination varies by utility and neighborhood — find your exact ZIP code below to see the system that serves you. If you're in an affected area, an NSF/ANSI 53 or 58 certified filter (carbon block or reverse osmosis) is the most reliable way to reduce PFAS at the tap.
By utility
02Water systems serving San Jose
- High Risk
GREAT OAKS WC INC
5 detected · 1 above limit · PWSID CA4310022
- High Risk
SAN JOSE WATER
3 detected · 1 above limit · PWSID CA4310011
- Low Level
HGST INC
1 detected · 0 above limit · PWSID CA4300791
- Low Level
CITY OF SAN JOSE - EVG/EDV/COY
1 detected · 0 above limit · PWSID CA4310020
- Low Level
CITY OF SAN JOSE - NSJ/ALVISO
1 detected · 0 above limit · PWSID CA4310019
By ZIP code
03Find your exact result
Contamination can differ block to block. Select your ZIP code for the precise reading at the utility that serves your address.
Source & Methodology
About this data
City-level figures aggregate the individual public water systems tested under EPA UCMR 5 whose service area falls within the San Jose area. Values reflect water quality at the treatment plant; your home's plumbing can affect what reaches your tap. Select your ZIP above for the utility-specific reading.