Physical & aggregate · 2023
Hardness in California Water Service-s San Francisco — San Jose, Ca, CA tap water
California Water Service-s San Francisco — 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 |
|---|---|---|
Range Groundwater | 286–444 mg/L | None set |
Average Groundwater | 369 mg/L | None set |
Average SFPUC | 60 mg/L | None set |
Range SFPUC | 8.4–106 mg/L | None set |
Verbatim from California Water Service-s San Francisco — 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-s San Francisco — San Jose, Ca, CA compares
Nearby systems also reporting Hardness:
People also ask
+Is there Hardness in California Water Service-s San Francisco — San Jose, Ca, CA tap water?
Yes — California Water Service-s San Francisco — San Jose, Ca, CA's 2023 Consumer Confidence Report lists Hardness at 369 mg/L. California Water Service-s San Francisco — 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-s San Francisco — 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-s-san-francisco-san-jose-ca/2023/source.