PFAS ("forever chemicals") · 2024
Perfluorohexanesulfonic acid in Madison, WI tap water
Madison, WI's 2024 Perfluorohexanesulfonic acid measurement is below the federal limit of 10 (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range System-wide | 3.7–4.8 | 10 MCL |
Range System-wide | 6.6–7.3 | 10 MCL |
Verbatim from Madison, WI's 2024 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 Madison, WI compares
5 of the 128 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 Madison, WI tap water?
Yes — Madison, WI's 2024 Consumer Confidence Report lists Perfluorohexanesulfonic acid at 6.6–7.3. Madison, WI's 2024 Perfluorohexanesulfonic acid measurement is below the federal limit of 10 (MCL).
+What's the federal limit for Perfluorohexanesulfonic acid in drinking water?
The federal MCL for Perfluorohexanesulfonic acid is 10 . 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 128 systems on The Water Map measuring Perfluorohexanesulfonic acid report it at or above the federal limit. Examples include New Braunfels, TX, Burbank, CA, Chula Vista Sweetwater, CA.
+Where does this Perfluorohexanesulfonic acid measurement come from?
This page reproduces the Perfluorohexanesulfonic acid entry from the 2024 Consumer Confidence Report published by the Madison, WI 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/wi/madison/2024/source.