Physical & aggregate · 2024
Hardness in Pomona, CA tap water
Pomona, CA's 2024 Consumer Confidence Report shows Hardness at or above the federal limit (1 mg/L MCL). Measured value is 272.0× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Weymouth Effluent | 241–272 mg/L | 1 mg/L MCL |
Range Pomona Groundwater | 150–246 mg/L | 1 mg/L MCL |
Reported level Miramar Groundwater Well #1 | 180 mg/L | 1 mg/L MCL |
Reported level Miramar Effluent | 99 mg/L | 1 mg/L MCL |
Reported level Miramar Groundwater Grand Well | 20 mg/L | 1 mg/L MCL |
Range Pomona Effluent | 160–165 mg/L | 1 mg/L MCL |
Reported level Miramar Groundwater Well #2 | 190 mg/L | 1 mg/L MCL |
Verbatim from Pomona, 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 Pomona, 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 Pomona, CA tap water?
Yes — Pomona, CA's 2024 Consumer Confidence Report lists Hardness at 241–272 mg/L. Pomona, CA's 2024 Consumer Confidence Report shows Hardness at or above the federal limit (1 mg/L MCL). Measured value is 272.0× the threshold.
+What's the federal limit for Hardness in drinking water?
The federal MCL for Hardness is 1 mg/L. 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 Burbank, CA, San Diego, CA, Vancouver, WA.
+Where does this Hardness measurement come from?
This page reproduces the Hardness entry from the 2024 Consumer Confidence Report published by the Pomona, 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/pomona/2024/source.