Physical & aggregate · 2025
Hardness in Los Angeles-city, Dept. of Water & Power, CA tap water
Los Angeles-city, Dept. of Water & Power, CA's 2025 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 | 578 MG/L | None set |
Highest single sample Entry point | 529 MG/L | None set |
Average Source water | 373.1125 MG/L | None set |
Average Entry point | 341.4344827586207 MG/L | None set |
Verbatim from Los Angeles-city, Dept. of Water & Power, CA's 2025 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 Los Angeles-city, Dept. of Water & Power, CA compares
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People also ask
+Is there Hardness in Los Angeles-city, Dept. of Water & Power, CA tap water?
Yes — Los Angeles-city, Dept. of Water & Power, CA's 2025 Consumer Confidence Report lists Hardness at 373.1125 MG/L. Los Angeles-city, Dept. of Water & Power, CA's 2025 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.
+Where does this Hardness measurement come from?
This page reproduces the Hardness entry from the 2025 Consumer Confidence Report published by the Los Angeles-city, Dept. of Water & Power, 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/los-angeles-city-dept-of-water-power/2025/source.