Physical & aggregate · 2023
Hardness in San Diego, CA tap water
San Diego, CA's 2023 Consumer Confidence Report shows Hardness at or above the federal limit (0.6 MCL). Measured value is 22.3× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range Alvarado | 10.1–14.1 | 0.6 MCL |
Range Purchased Treated Water | 3.5–14.2 | 0.6 MCL |
Average Purchased Treated Water | 9.1 | 0.6 MCL |
Average Miramar | 13.4 | 0.6 MCL |
Average Otay | 13.4 | 0.6 MCL |
Range Purchased Treated Water | 3.5–14.2 | 0.6 MCL |
Range Miramar | 10.1–14.5 | 0.6 MCL |
Average Purchased Treated Water | 9.1 | 0.6 MCL |
Average Alvarado | 12.6 | 0.6 MCL |
Range Otay | 11.4–14.3 | 0.6 MCL |
Range Otay | 11.4–14.3 | 0.6 MCL |
Range Miramar | 10.1–14.5 | 0.6 MCL |
Average Otay | 13.4 | 0.6 MCL |
Average Alvarado | 12.6 | 0.6 MCL |
Average Miramar | 13.4 | 0.6 MCL |
Range Alvarado | 10.1–14.1 | 0.6 MCL |
Verbatim from San Diego, 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 San Diego, CA compares
3 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 San Diego, CA tap water?
Yes — San Diego, CA's 2023 Consumer Confidence Report lists Hardness at 13.4. San Diego, CA's 2023 Consumer Confidence Report shows Hardness at or above the federal limit (0.6 MCL). Measured value is 22.3× the threshold.
+What's the federal limit for Hardness in drinking water?
The federal MCL for Hardness is 0.6 . The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+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?
3 of the 124 systems on The Water Map measuring Hardness report it at or above the federal limit. Examples include Pomona, CA, Burbank, CA, Vancouver, WA.
+Where does this Hardness measurement come from?
This page reproduces the Hardness entry from the 2023 Consumer Confidence Report published by the San Diego, 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/san-diego/2023/source.