Inorganic chemicals · 2026
Bromide in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2026 report shows Bromide detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Source water | 0.1 MG/L | None set |
Highest single sample Source water | 0.1 MG/L | None set |
Verbatim from Contra Costa Water District, CA's 2026 Consumer Confidence Report — source document ↗
About Bromide
A naturally occurring salt found in source water.
Not directly regulated, but a precursor that increases formation of brominated disinfection byproducts.
How Contra Costa Water District, CA compares
2 of the 63 systems measuring Bromide on The Water Map have it at or above the federal limit:
Nearby systems also reporting Bromide:
People also ask
+Is there Bromide in Contra Costa Water District, CA tap water?
Yes — Contra Costa Water District, CA's 2026 Consumer Confidence Report lists Bromide at 0.1 MG/L. Contra Costa Water District, CA's 2026 report shows Bromide detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Bromide in drinking water?
The EPA has not set an enforceable federal limit for Bromide. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Bromide?
A naturally occurring salt found in source water. Not directly regulated, but a precursor that increases formation of brominated disinfection byproducts.
+Which other U.S. cities have Bromide over the federal limit?
2 of the 63 systems on The Water Map measuring Bromide report it at or above the federal limit. Examples include Kansas City, KS, Columbia, MO.
+Where does this Bromide measurement come from?
This page reproduces the Bromide entry from the 2026 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/2026/source.