Disinfection byproducts · 2025
Bromodichloromethane in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2025 report shows Bromodichloromethane detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Entry point | 7.3 UG/L | None set |
Highest single sample Distribution | 9.3 UG/L | None set |
Average Distribution | 5.84 UG/L | None set |
Highest single sample Entry point | 9.2 UG/L | None set |
Verbatim from Contra Costa Water District, CA's 2025 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 Contra Costa Water District, CA compares
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People also ask
+Is there Bromodichloromethane in Contra Costa Water District, CA tap water?
Yes — Contra Costa Water District, CA's 2025 Consumer Confidence Report lists Bromodichloromethane at 7.3 UG/L. Contra Costa Water District, CA's 2025 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 2025 Consumer Confidence Report published by the Contra Costa Water District, 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/contra-costa-water-district/2025/source.