Physical & aggregate · 2026
Hardness in Pomona - City, Water Dept., CA tap water
Pomona - City, Water Dept., CA's 2026 report shows Hardness detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Entry point | 196 MG/L | None set |
Average Source water | 184 MG/L | None set |
Highest single sample Source water | 210 MG/L | None set |
Highest single sample Entry point | 280 MG/L | None set |
Verbatim from Pomona - City, Water Dept., CA's 2026 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 Pomona - City, Water Dept., CA compares
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People also ask
+Is there Hardness in Pomona - City, Water Dept., CA tap water?
Yes — Pomona - City, Water Dept., CA's 2026 Consumer Confidence Report lists Hardness at 196 MG/L. Pomona - City, Water Dept., CA's 2026 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 2026 Consumer Confidence Report published by the Pomona - City, Water Dept., 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/pomona-city-water-dept/2026/source.