PFAS ("forever chemicals") · 2023
Perfluorohexanesulfonic acid in Modesto, City of — Modesto, Ca, CA tap water
Modesto, City of — Modesto, Ca, CA's 2023 Perfluorohexanesulfonic acid measurement is below the federal limit of 3 ng/L (NL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average System-wide | 0.26 ng/L | 3 ng/L NL |
Range System-wide | 0–6.4 ng/L | 3 ng/L NL |
Average System-wide | 0.74 ng/L | 10 ng/L MCL |
Range System-wide | 0–9.3 ng/L | 10 ng/L MCL |
Verbatim from Modesto, City of — Modesto, Ca, CA's 2023 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 Modesto, City of — Modesto, Ca, CA compares
5 of the 39 CA 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 Modesto, City of — Modesto, Ca, CA tap water?
Yes — Modesto, City of — Modesto, Ca, CA's 2023 Consumer Confidence Report lists Perfluorohexanesulfonic acid at 0.74 ng/L. Modesto, City of — Modesto, Ca, CA's 2023 Perfluorohexanesulfonic acid measurement is below the federal limit of 3 ng/L (NL).
+What's the federal limit for Perfluorohexanesulfonic acid in drinking water?
The federal NL for Perfluorohexanesulfonic acid is 3 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 39 CA systems on The Water Map measuring Perfluorohexanesulfonic acid report it at or above the federal limit. Examples include San Bernardino Valley Wd — San Bernardino, Ca, CA, Corona, City of — Corona, Ca, CA, Montara Water and Sanitary District — Montara, Ca, CA.
+Where does this Perfluorohexanesulfonic acid measurement come from?
This page reproduces the Perfluorohexanesulfonic acid entry from the 2023 Consumer Confidence Report published by the Modesto, City of — Modesto, Ca, 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/modesto-modesto-ca/2023/source.