Physical & aggregate · 2024
Hardness in Orinda, CA tap water
Orinda, CA's 2024 report shows Hardness detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Orinda | 14–40 mg/L | None set |
Reported level Orinda | 1–2 | None set |
Reported level Lafayette | 14–27 mg/L | None set |
Reported level Sobrante | 64–98 mg/L | None set |
Reported level USL | 8–9 | None set |
Reported level Walnut Creek | 1 | None set |
Reported level Sobrante | 4–6 | None set |
Reported level Walnut Creek | 15–21 mg/L | None set |
Reported level Lafayette | 1–2 | None set |
Reported level USL | 140–160 mg/L | None set |
Verbatim from Orinda, CA's 2024 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 Orinda, CA compares
4 of the 124 systems measuring Hardness on The Water Map have it at or above the federal limit:
Nearby systems also reporting Hardness:
People also ask
+Is there Hardness in Orinda, CA tap water?
Yes — Orinda, CA's 2024 Consumer Confidence Report lists Hardness at 140–160 mg/L. Orinda, CA's 2024 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.
+Which other U.S. cities have Hardness over the federal limit?
4 of the 124 systems on The Water Map measuring Hardness report it at or above the federal limit. Examples include Pomona, CA, Burbank, CA, San Diego, CA.
+Where does this Hardness measurement come from?
This page reproduces the Hardness entry from the 2024 Consumer Confidence Report published by the Orinda, 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/orinda/2024/source.