Physical & aggregate · 2024
Hardness in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2024 report shows Hardness detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Source water | 131 MG/L | None set |
Average Entry point | 70.92 MG/L | None set |
Average Distribution | 76 MG/L | None set |
Average Source water | 76.64 MG/L | None set |
Highest single sample Distribution | 76 MG/L | None set |
Highest single sample Entry point | 88 MG/L | None set |
Verbatim from Contra Costa Water District, CA's 2024 Consumer Confidence Report — source document ↗
About Hardness
A measure of dissolved calcium and magnesium minerals.
Not federally regulated for health; affects scaling, soap use, and taste.
How Contra Costa Water District, CA compares
1 of the 210 systems measuring Hardness on The Water Map have it at or above the federal limit:
Nearby systems also reporting Hardness:
People also ask
+Is there Hardness in Contra Costa Water District, CA tap water?
Yes — Contra Costa Water District, CA's 2024 Consumer Confidence Report lists Hardness at 76.64 MG/L. Contra Costa Water District, CA's 2024 report shows Hardness detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Hardness in drinking water?
The EPA has not set an enforceable federal limit for Hardness. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Hardness?
A measure of dissolved calcium and magnesium minerals. Not federally regulated for health; affects scaling, soap use, and taste.
+Which other U.S. cities have Hardness over the federal limit?
1 of the 210 systems on The Water Map measuring Hardness report it at or above the federal limit. Examples include Vancouver, WA.
+Where does this Hardness measurement come from?
This page reproduces the Hardness entry from the 2024 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/2024/source.