City overview · San Diego County
PFAS in San Diego, CA
High RiskEPA UCMR 5 tested 7 public water systems serving the San Diego area across 38 ZIP codes. At least one utility serving San Diego has PFAS above the EPA's enforceable limit.
Plain English
01What this means for San Diego
Across the 7 public water systems tested in the San Diego 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 Diego
- High Risk
SWEETWATER AUTHORITY
9 detected · 2 above limit · PWSID CA3710025
- Low Level
SAN DIEGO, CITY OF
1 detected · 0 above limit · PWSID CA3710020
- Low Level
OTAY WATER DISTRICT
1 detected · 0 above limit · PWSID CA3710034
- Low Level
HELIX WATER DISTRICT
1 detected · 0 above limit · PWSID CA3710010
- Low Level
OLIVENHAIN MWD
1 detected · 0 above limit · PWSID CA3710029
- Low Level
NAS NORTH ISLAND & NAB CORONADO
1 detected · 0 above limit · PWSID CA3710750
- Low Level
CAL-AM WATER CORONADO
1 detected · 0 above limit · PWSID CA3710001
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 Diego 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.