Other · 2026
Mcaa in California Water Service - San Mateo, CA tap water
California Water Service - San Mateo, CA's 2026 report shows Mcaa detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Distribution | 2.2 UG/L | None set |
Average Distribution | 1.55 UG/L | None set |
Verbatim from California Water Service - San Mateo, CA's 2026 Consumer Confidence Report — source document ↗
How California Water Service - San Mateo, CA compares
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People also ask
+Is there Mcaa in California Water Service - San Mateo, CA tap water?
Yes — California Water Service - San Mateo, CA's 2026 Consumer Confidence Report lists Mcaa at 1.55 UG/L. California Water Service - San Mateo, CA's 2026 report shows Mcaa detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Mcaa in drinking water?
The EPA has not set an enforceable federal limit for Mcaa. Utilities still report any measured levels in their annual Consumer Confidence Report.
+Where does this Mcaa measurement come from?
This page reproduces the Mcaa entry from the 2026 Consumer Confidence Report published by the California Water Service - San Mateo, 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/california-water-service-san-mateo/2026/source.