PFAS ("forever chemicals") · 2023

PFOS in Western MWD — Riverside, Ca, CA tap water

Within the federal limit

Western MWD — Riverside, Ca, CA's 2023 PFOS measurement is below the federal limit of 6.5 ng/L (NL).

The measurement

StatisticValue
Average
Riverside Service Area Local Groundwater
Not detected ng/L
Average
Murrieta Service Area Surface Water
Not detected ng/L
Average
Murrieta
Not detected ng/L
Average
Rainbow Service Area Surface Water
Not detected ng/L
Average
Riverside
Not detected ng/L
Range
Murrieta Service Area Local Groundwater
0–4.1 ng/L
Average
Murrieta Service Area Local Groundwater
Not detected ng/L
Average
Riverside Service Area Surface Water
Not detected ng/L
Range
Murrieta
0–4 ng/L

Verbatim from Western MWD — Riverside, 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 Western MWD — Riverside, 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 Western MWD — Riverside, Ca, CA tap water?

Yes — Western MWD — Riverside, Ca, CA's 2023 Consumer Confidence Report lists PFOS at Not detected ng/L. Western MWD — Riverside, Ca, CA's 2023 PFOS measurement is below the federal limit of 6.5 ng/L (NL).

+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 Western MWD — Riverside, 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/western-mwd-riverside-ca/2023/source.

Full report
All Western MWD — Riverside, Ca, CA water-quality data →
Every contaminant measured in the 2023 report.
Contaminant pillar
PFOS across the U.S. →
Every public water system measuring PFOS, ranked.