Disinfection byproducts · 2026
Bromodichloromethane in California Water Service - San Mateo, CA tap water
California Water Service - San Mateo, CA's 2026 report shows Bromodichloromethane detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Distribution | 7.128571428571428 UG/L | None set |
Highest single sample Distribution | 8 UG/L | None set |
Verbatim from California Water Service - San Mateo, CA's 2026 Consumer Confidence Report — source document ↗
About Bromodichloromethane
A trihalomethane disinfection byproduct.
Counted within regulated total trihalomethanes; long-term exposure is associated with cancer and reproductive effects.
How California Water Service - San Mateo, CA compares
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People also ask
+Is there Bromodichloromethane in California Water Service - San Mateo, CA tap water?
Yes — California Water Service - San Mateo, CA's 2026 Consumer Confidence Report lists Bromodichloromethane at 7.128571428571428 UG/L. California Water Service - San Mateo, CA's 2026 report shows Bromodichloromethane detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Bromodichloromethane in drinking water?
The EPA has not set an enforceable federal limit for Bromodichloromethane. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Bromodichloromethane?
A trihalomethane disinfection byproduct. Counted within regulated total trihalomethanes; long-term exposure is associated with cancer and reproductive effects.
+Where does this Bromodichloromethane measurement come from?
This page reproduces the Bromodichloromethane 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.