Disinfection byproducts · 2026
Bromoform in California Water Service - San Mateo, CA tap water
California Water Service - San Mateo, CA's 2026 report shows Bromoform detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Distribution | 1.7 UG/L | None set |
Average Distribution | 1.0371428571428571 UG/L | None set |
Verbatim from California Water Service - San Mateo, CA's 2026 Consumer Confidence Report — source document ↗
About Bromoform
A trihalomethane disinfection byproduct.
Counted within regulated total trihalomethanes; long-term exposure is associated with liver and kidney effects.
How California Water Service - San Mateo, CA compares
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People also ask
+Is there Bromoform in California Water Service - San Mateo, CA tap water?
Yes — California Water Service - San Mateo, CA's 2026 Consumer Confidence Report lists Bromoform at 1.0371428571428571 UG/L. California Water Service - San Mateo, CA's 2026 report shows Bromoform detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Bromoform in drinking water?
The EPA has not set an enforceable federal limit for Bromoform. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Bromoform?
A trihalomethane disinfection byproduct. Counted within regulated total trihalomethanes; long-term exposure is associated with liver and kidney effects.
+Where does this Bromoform measurement come from?
This page reproduces the Bromoform 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.