PFAS ("forever chemicals") · 2023
PFOS in City of Pleasanton — Pleasanton, Ca, CA tap water
City of Pleasanton — Pleasanton, Ca, CA's 2023 Consumer Confidence Report shows PFOS at or above the federal limit (6.5 ng/L NL). Measured value is 6.8× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range Well 6 | 3.5–26 ng/L | 6.5 ng/L NL |
Average Well 8 | 27.2 ng/L | 6.5 ng/L NL |
Average Surface Water | Not detected | 40 MCL |
Average Groundwater | Not detected | 40 MCL |
Range Groundwater | 0–4.5 | 40 MCL |
Average Well 5 | 14.1 ng/L | 6.5 ng/L NL |
Range Well 5 | 12–17 ng/L | 6.5 ng/L NL |
Range Well 8 | 19–34 ng/L | 6.5 ng/L NL |
Average Well 6 | 19 ng/L | 6.5 ng/L NL |
Verbatim from City of Pleasanton — Pleasanton, Ca, CA's 2023 Consumer Confidence Report — source document ↗
About PFOS
Perfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings.
Linked to cancer, thyroid disease, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
How City of Pleasanton — Pleasanton, Ca, CA compares
5 of the 328 systems measuring PFOS on The Water Map have it at or above the federal limit:
Nearby systems also reporting PFOS:
People also ask
+Is there PFOS in City of Pleasanton — Pleasanton, Ca, CA tap water?
Yes — City of Pleasanton — Pleasanton, Ca, CA's 2023 Consumer Confidence Report lists PFOS at 27.2 ng/L. City of Pleasanton — Pleasanton, Ca, CA's 2023 Consumer Confidence Report shows PFOS at or above the federal limit (6.5 ng/L NL). Measured value is 6.8× the threshold.
+What's the federal limit for PFOS in drinking water?
The federal NL for PFOS is 6.5 ng/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is PFOS?
Perfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. Linked to cancer, thyroid disease, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
+Which other U.S. cities have PFOS over the federal limit?
5 of the 328 systems on The Water Map measuring PFOS report it at or above the federal limit. Examples include Greensboro, NC, Riverside Highland Water Company — Grand Terrace, Ca, CA, Abilene, TX.
+Where does this PFOS measurement come from?
This page reproduces the PFOS entry from the 2023 Consumer Confidence Report published by the City of Pleasanton — Pleasanton, 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/pleasanton-pleasanton-ca/2023/source.