PFAS ("forever chemicals") · 2024
Perfluorobutanesulfonic acid in Charleston, SC tap water
Charleston, SC's 2024 report shows Perfluorobutanesulfonic acid detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Aug 2018 | 3.8 ng/L | 2 ng/L NL |
Reported level Dec 2018 | 4 ng/L | 2 ng/L NL |
Reported level Feb 2019 | 3.2 ng/L | 2 ng/L NL |
Reported level May 2019 | 3.5 ng/L | 2 ng/L NL |
Reported level Oct 2020 | 2.9 ng/L | 2 ng/L NL |
Reported level Nov 2021 | 3.5 ng/L | 2 ng/L NL |
Reported level Feb 2022 | 3.8 ng/L | 2 ng/L NL |
Reported level Oct 2023 | 2.8 ng/L | 2 ng/L NL |
Reported level Jan 2024 | 2.6 ng/L | 2 ng/L NL |
Verbatim from Charleston, SC's 2024 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 Charleston, SC compares
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People also ask
+Is there Perfluorobutanesulfonic acid in Charleston, SC tap water?
Yes — Charleston, SC's 2024 Consumer Confidence Report lists Perfluorobutanesulfonic acid at 4 ng/L. Charleston, SC's 2024 report shows Perfluorobutanesulfonic acid detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Perfluorobutanesulfonic acid in drinking water?
The federal NL for Perfluorobutanesulfonic acid is 2 ng/L. 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.
+Where does this Perfluorobutanesulfonic acid measurement come from?
This page reproduces the Perfluorobutanesulfonic acid entry from the 2024 Consumer Confidence Report published by the Charleston, SC 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/sc/charleston/2024/source.