PFAS ("forever chemicals") · 2024
Perfluorohexanesulfonic acid in Rockville, MD tap water
Rockville, MD's 2024 Perfluorohexanesulfonic acid measurement is below the federal limit of 10 ng/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average System-wide | 1.13 ng/L | 10 ng/L MCL |
Minimum System-wide | 0 ng/L | 10 ng/L MCL |
Maximum System-wide | 1.9 ng/L | 10 ng/L MCL |
Verbatim from Rockville, MD'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 Rockville, MD compares
3 of the 10 MD 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 Rockville, MD tap water?
Yes — Rockville, MD's 2024 Consumer Confidence Report lists Perfluorohexanesulfonic acid at 1.13 ng/L. Rockville, MD's 2024 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?
3 of the 10 MD systems on The Water Map measuring Perfluorohexanesulfonic acid report it at or above the federal limit. Examples include Backbone Mountain Boys Camp, MD, Cheltenham Youth Facility, MD, Town of Accident, MD.
+Where does this Perfluorohexanesulfonic acid measurement come from?
This page reproduces the Perfluorohexanesulfonic acid entry from the 2024 Consumer Confidence Report published by the Rockville, MD 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/md/rockville/2024/source.