PFAS ("forever chemicals") · 2021
PFOS in Del Rio Mutual — El Monte, Ca, CA tap water
Del Rio Mutual — El Monte, Ca, CA's 2021 Consumer Confidence Report shows PFOS at or above the federal limit (4 ng/L MCL). Measured value is 2.6× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average System-wide | 10.5 ng/L | 4 ng/L MCL |
Range System-wide | 10–11 ng/L | 4 ng/L MCL |
Verbatim from Del Rio Mutual — El Monte, Ca, CA's 2021 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 Del Rio Mutual — El Monte, 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 Del Rio Mutual — El Monte, Ca, CA tap water?
Yes — Del Rio Mutual — El Monte, Ca, CA's 2021 Consumer Confidence Report lists PFOS at 10.5 ng/L. Del Rio Mutual — El Monte, Ca, CA's 2021 Consumer Confidence Report shows PFOS at or above the federal limit (4 ng/L MCL). Measured value is 2.6× the threshold.
+What's the federal limit for PFOS in drinking water?
The federal MCL for PFOS is 4 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 2021 Consumer Confidence Report published by the Del Rio Mutual — El Monte, 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/del-rio-mutual-el-monte-ca/2021/source.