PFAS ("forever chemicals") · 2025
Perfluorobutanesulfonic acid in Rochester, MN tap water
Rochester, MN's 2025 Perfluorobutanesulfonic acid measurement is below the federal limit of 100 (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Maximum Average Result or Highest Single Test Result | 0.55 | 100 MCL |
Range of Detected Test Results | 0–0.55 | 100 MCL |
Verbatim from Rochester, MN's 2025 Consumer Confidence Report — source document ↗
About Perfluorobutanesulfonic acid
Perfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.'
Has no standalone limit but is part of the EPA PFAS Hazard Index that limits PFAS in combination.
How Rochester, MN compares
5 of the 146 systems measuring Perfluorobutanesulfonic acid on The Water Map have it at or above the federal limit:
Nearby systems also reporting Perfluorobutanesulfonic acid:
People also ask
+Is there Perfluorobutanesulfonic acid in Rochester, MN tap water?
Yes — Rochester, MN's 2025 Consumer Confidence Report lists Perfluorobutanesulfonic acid at 0.55. Rochester, MN's 2025 Perfluorobutanesulfonic acid measurement is below the federal limit of 100 (MCL).
+What's the federal limit for Perfluorobutanesulfonic acid in drinking water?
The federal MCL for Perfluorobutanesulfonic acid is 100 . The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Perfluorobutanesulfonic acid?
Perfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' Has no standalone limit but is part of the EPA PFAS Hazard Index that limits PFAS in combination.
+Which other U.S. cities have Perfluorobutanesulfonic acid over the federal limit?
5 of the 146 systems on The Water Map measuring Perfluorobutanesulfonic acid report it at or above the federal limit. Examples include Gilbert, AZ, Chula Vista Sweetwater, CA, Charleston, SC.
+Where does this Perfluorobutanesulfonic acid measurement come from?
This page reproduces the Perfluorobutanesulfonic acid entry from the 2025 Consumer Confidence Report published by the Rochester, MN 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/mn/rochester/2025/source.