Physical & aggregate · 2023
Hardness in California Water Service Co. - Dominguez — San Jose, Ca, CA tap water
California Water Service Co. - Dominguez — San Jose, Ca, CA's 2023 report shows Hardness detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Groundwater | 126 mg/L | None set |
Average Skinner Plant | 242 mg/L | None set |
Range Jensen Plant | 143–153 mg/L | None set |
Average Weymouth Plant | 272 mg/L | None set |
Range Diemer Plant | 235–305 mg/L | None set |
Average Jensen Plant | 148 mg/L | None set |
Range Groundwater | 48–300 mg/L | None set |
Range Weymouth Plant | 241–303 mg/L | None set |
Average Diemer Plant | 270 mg/L | None set |
Range Skinner Plant | 242–243 mg/L | None set |
Average Mills Plant | 84 mg/L | None set |
Range Mills Plant | 68–99 mg/L | None set |
Verbatim from California Water Service Co. - Dominguez — San Jose, Ca, CA's 2023 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 California Water Service Co. - Dominguez — San Jose, Ca, CA compares
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People also ask
+Is there Hardness in California Water Service Co. - Dominguez — San Jose, Ca, CA tap water?
Yes — California Water Service Co. - Dominguez — San Jose, Ca, CA's 2023 Consumer Confidence Report lists Hardness at 272 mg/L. California Water Service Co. - Dominguez — San Jose, Ca, CA's 2023 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 2023 Consumer Confidence Report published by the California Water Service Co. - Dominguez — San Jose, Ca, 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/california-water-service-co-dominguez-san-jose-ca/2023/source.