PFAS ("forever chemicals") · 2026
Perfluorohexanoic acid in Irvine Ranch Water District, CA tap water
Irvine Ranch Water District, 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 Entry point | 2.7 NG/L | None set |
Average Entry point | 1.275 NG/L | None set |
Highest single sample Source water | 12 NG/L | None set |
Average Source water | 5.3428571428571425 NG/L | None set |
Verbatim from Irvine Ranch Water District, 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 Irvine Ranch Water District, 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 Irvine Ranch Water District, CA tap water?
Yes — Irvine Ranch Water District, CA's 2026 Consumer Confidence Report lists Perfluorohexanoic acid at 5.3428571428571425 NG/L. Irvine Ranch Water District, 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 Irvine Ranch Water District, 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/irvine-ranch-water-district/2026/source.