Metals · 2024
Magnesium in Pomona, CA tap water
Pomona, CA's 2024 Consumer Confidence Report shows Magnesium at or above the federal limit (0.01 mg/L MCL). Measured value is 2600.0× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Miramar Groundwater Well #1 | 9.4 mg/L | 0.01 mg/L MCL |
Range Pomona Effluent | 8.6–9.8 mg/L | 0.01 mg/L MCL |
Reported level Weymouth Effluent | 25–26 mg/L | 0.01 mg/L MCL |
Reported level Miramar Groundwater Well #2 | 9.3 mg/L | 0.01 mg/L MCL |
Reported level Miramar Groundwater Grand Well | 8.5 mg/L | 0.01 mg/L MCL |
Reported level Miramar Effluent | 11 mg/L | 0.01 mg/L MCL |
Range Pomona Groundwater | 6.3–14 mg/L | 0.01 mg/L MCL |
Verbatim from Pomona, CA's 2024 Consumer Confidence Report — source document ↗
About Magnesium
A naturally occurring mineral that contributes to water hardness.
Not federally regulated for health; affects scaling and taste.
How Pomona, CA compares
2 of the 111 systems measuring Magnesium on The Water Map have it at or above the federal limit:
Nearby systems also reporting Magnesium:
People also ask
+Is there Magnesium in Pomona, CA tap water?
Yes — Pomona, CA's 2024 Consumer Confidence Report lists Magnesium at 25–26 mg/L. Pomona, CA's 2024 Consumer Confidence Report shows Magnesium at or above the federal limit (0.01 mg/L MCL). Measured value is 2600.0× the threshold.
+What's the federal limit for Magnesium in drinking water?
The federal MCL for Magnesium is 0.01 mg/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Magnesium?
A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and taste.
+Which other U.S. cities have Magnesium over the federal limit?
2 of the 111 systems on The Water Map measuring Magnesium report it at or above the federal limit. Examples include Burbank, CA, Vancouver, WA.
+Where does this Magnesium measurement come from?
This page reproduces the Magnesium 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.