PFAS ("forever chemicals") · 2026
Perfluorohexanoic acid in Rialto, City of, CA tap water
Rialto, City of, CA's 2026 report shows Perfluorohexanoic acid detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Source water | 3.9 NG/L | None set |
Average Source water | 1.4142857142857144 NG/L | None set |
Verbatim from Rialto, City of, CA's 2026 Consumer Confidence Report — source document ↗
About Perfluorohexanoic acid
Perfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.'
Monitored under EPA rules; persistent and widely detected.
How Rialto, City of, CA compares
5 of the 229 systems measuring Perfluorohexanoic acid on The Water Map have it at or above the federal limit:
Nearby systems also reporting Perfluorohexanoic acid:
People also ask
+Is there Perfluorohexanoic acid in Rialto, City of, CA tap water?
Yes — Rialto, City of, CA's 2026 Consumer Confidence Report lists Perfluorohexanoic acid at 1.4142857142857144 NG/L. Rialto, City of, CA's 2026 report shows Perfluorohexanoic acid detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Perfluorohexanoic acid in drinking water?
The EPA has not set an enforceable federal limit for Perfluorohexanoic acid. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Perfluorohexanoic acid?
Perfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and widely detected.
+Which other U.S. cities have Perfluorohexanoic acid over the federal limit?
5 of the 229 systems on The Water Map measuring Perfluorohexanoic acid report it at or above the federal limit. Examples include Boonsboro Keedysville, MD, City of Poquoson, VA, Hampton, VA.
+Where does this Perfluorohexanoic acid measurement come from?
This page reproduces the Perfluorohexanoic acid entry from the 2026 Consumer Confidence Report published by the Rialto, 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/rialto/2026/source.