PFAS ("forever chemicals") · 2025
Perfluorohexanesulfonic acid in Western MWD - Murrieta Division, CA tap water
Western MWD - Murrieta Division, CA's 2025 Perfluorohexanesulfonic acid measurement is below the federal limit of 10 ng/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Entry point | 4.1000000000000005 ng/L | 10 ng/L MCL |
Verbatim from Western MWD - Murrieta Division, CA's 2025 Consumer Confidence Report — source document ↗
About Perfluorohexanesulfonic acid
Perfluorohexanesulfonic acid, a PFAS 'forever chemical.'
Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index.
How Western MWD - Murrieta Division, CA compares
5 of the 116 systems measuring Perfluorohexanesulfonic acid on The Water Map have it at or above the federal limit:
Nearby systems also reporting Perfluorohexanesulfonic acid:
People also ask
+Is there Perfluorohexanesulfonic acid in Western MWD - Murrieta Division, CA tap water?
Yes — Western MWD - Murrieta Division, CA's 2025 Consumer Confidence Report lists Perfluorohexanesulfonic acid at 4.1000000000000005 ng/L. Western MWD - Murrieta Division, CA's 2025 Perfluorohexanesulfonic acid measurement is below the federal limit of 10 ng/L (MCL).
+What's the federal limit for Perfluorohexanesulfonic acid in drinking water?
The federal MCL for Perfluorohexanesulfonic acid is 10 ng/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Perfluorohexanesulfonic acid?
Perfluorohexanesulfonic acid, a PFAS 'forever chemical.' Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index.
+Which other U.S. cities have Perfluorohexanesulfonic acid over the federal limit?
5 of the 116 systems on The Water Map measuring Perfluorohexanesulfonic acid report it at or above the federal limit. Examples include Burbank, CA, Chula Vista Sweetwater, CA, Chico, CA.
+Where does this Perfluorohexanesulfonic acid measurement come from?
This page reproduces the Perfluorohexanesulfonic acid entry from the 2025 Consumer Confidence Report published by the Western MWD - Murrieta Division, 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/western-mwd-murrieta-division/2025/source.