Physical & aggregate · 2023
Hardness in Irvine, CA tap water
Irvine, 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 Local Treated Groundwater | 5.5 | None set |
Range System-wide | 3.3–18.8 | None set |
Average Local Treated Groundwater | 93.3 mg/L | None set |
Average Local Treated Surface Water | 17.4 | None set |
Average Local Treated Surface Water | 297 mg/L | None set |
Range System-wide | 57.2–321 mg/L | None set |
Average Imported MWD Treated Water | 160 mg/L | None set |
Average Imported MWD Treated Water | 9.4 | None set |
Verbatim from Irvine, 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 Irvine, 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 Irvine, CA tap water?
Yes — Irvine, CA's 2023 Consumer Confidence Report lists Hardness at 297 mg/L. Irvine, 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.
+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 2023 Consumer Confidence Report published by the Irvine, 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/irvine/2023/source.