PFAS ("forever chemicals") · 2025
PFBA in San Diego, City of, CA tap water
San Diego, City of, CA's 2025 report shows PFBA detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Other | 8.01 NG/L | None set |
Highest single sample Entry point | 6.83 NG/L | None set |
Average Source water | 16.73333333333333 NG/L | None set |
Average Other | 5.2025 NG/L | None set |
Average Entry point | 4.538333333333333 NG/L | None set |
Highest single sample Source water | 19.4 NG/L | None set |
Verbatim from San Diego, City of, CA's 2025 Consumer Confidence Report — source document ↗
About PFBA
Perfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.'
Monitored under EPA rules; persistent in the environment and the human body.
How San Diego, City of, CA compares
5 of the 219 systems measuring PFBA on The Water Map have it at or above the federal limit:
Nearby systems also reporting PFBA:
People also ask
+Is there PFBA in San Diego, City of, CA tap water?
Yes — San Diego, City of, CA's 2025 Consumer Confidence Report lists PFBA at 16.73333333333333 NG/L. San Diego, City of, CA's 2025 report shows PFBA detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for PFBA in drinking water?
The EPA has not set an enforceable federal limit for PFBA. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is PFBA?
Perfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment and the human body.
+Which other U.S. cities have PFBA over the federal limit?
5 of the 219 systems on The Water Map measuring PFBA report it at or above the federal limit. Examples include City of Hampton, VA, City of Poquoson, VA, Hampton, VA.
+Where does this PFBA measurement come from?
This page reproduces the PFBA entry from the 2025 Consumer Confidence Report published by the San Diego, City of, CA water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/ca/san-diego/2025/source.