PFAS ("forever chemicals") · 2024
PFOS in Pomona, CA tap water
Pomona, CA's 2024 Consumer Confidence Report shows PFOS at or above the federal limit (6.5 ng/L NL). Measured value is 2.8× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Weymouth Effluent | Not detected ng/L | 6.5 ng/L NL |
Range Pomona Groundwater | 0–18 ng/L | 6.5 ng/L NL |
Reported level Miramar Groundwater Grand Well | Not detected ng/L | 6.5 ng/L NL |
Reported level Miramar Effluent | Not detected ng/L | 6.5 ng/L NL |
Reported level Miramar Groundwater Well #2 | Not detected ng/L | 6.5 ng/L NL |
Reported level Miragrand Well | 0–3.4 ng/L | 6.5 ng/L NL |
Reported level Miramar Groundwater Well #1 | Not detected ng/L | 6.5 ng/L NL |
Verbatim from Pomona, CA's 2024 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 Pomona, CA compares
5 of the 147 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 Pomona, CA tap water?
Yes — Pomona, CA's 2024 Consumer Confidence Report lists PFOS at 0–18 ng/L. Pomona, CA's 2024 Consumer Confidence Report shows PFOS at or above the federal limit (6.5 ng/L NL). Measured value is 2.8× 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 147 systems on The Water Map measuring PFOS report it at or above the federal limit. Examples include Charleston, SC, North Charleston, SC, City of Hialeah, FL.
+Where does this PFOS measurement come from?
This page reproduces the PFOS entry from the 2024 Consumer Confidence Report published by the Pomona, 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/pomona/2024/source.