Metals · 2025
Magnesium in San Gabriel Valley Wc - Fontana, CA tap water
San Gabriel Valley Wc - Fontana, CA's 2025 report shows Magnesium detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Entry point | 8.14 MG/L | None set |
Average Other | 7.84 MG/L | None set |
Highest single sample Source water | 9.27 MG/L | None set |
Average Source water | 7.594285714285713 MG/L | None set |
Highest single sample Entry point | 8.14 MG/L | None set |
Highest single sample Other | 7.84 MG/L | None set |
Verbatim from San Gabriel Valley Wc - Fontana, CA's 2025 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 San Gabriel Valley Wc - Fontana, CA compares
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People also ask
+Is there Magnesium in San Gabriel Valley Wc - Fontana, CA tap water?
Yes — San Gabriel Valley Wc - Fontana, CA's 2025 Consumer Confidence Report lists Magnesium at 8.14 MG/L. San Gabriel Valley Wc - Fontana, CA's 2025 report shows Magnesium detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Magnesium in drinking water?
The EPA has not set an enforceable federal limit for Magnesium. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Magnesium?
A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and taste.
+Where does this Magnesium measurement come from?
This page reproduces the Magnesium entry from the 2025 Consumer Confidence Report published by the San Gabriel Valley Wc - Fontana, 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-gabriel-valley-wc-fontana/2025/source.