Physical & aggregate · 2025
Hardness in City of Stockton, CA tap water
City of Stockton, 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 | 246 MG/L | None set |
Highest single sample Entry point | 80 MG/L | None set |
Average Source water | 82.42857142857143 MG/L | None set |
Average Entry point | 53.333333333333336 MG/L | None set |
Verbatim from City of Stockton, 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 City of Stockton, CA compares
Nearby systems also reporting Hardness:
People also ask
+Is there Hardness in City of Stockton, CA tap water?
Yes — City of Stockton, CA's 2025 Consumer Confidence Report lists Hardness at 82.42857142857143 MG/L. City of Stockton, 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 City of Stockton, 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/stockton/2025/source.