Metals · 2025
Magnesium in San Diego, City of, CA tap water
San Diego, City of, 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 |
|---|---|---|
Highest single sample Other | 31 MG/L | None set |
Highest single sample Entry point | 30.7 MG/L | None set |
Highest single sample Source water | 33.7 MG/L | None set |
Average Entry point | 23.705555555555556 MG/L | None set |
Average Other | 23.225 MG/L | None set |
Average Source water | 23.830434782608698 MG/L | None set |
Verbatim from San Diego, City of, 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 Diego, City of, CA compares
Nearby systems also reporting Magnesium:
People also ask
+Is there Magnesium in San Diego, City of, CA tap water?
Yes — San Diego, City of, CA's 2025 Consumer Confidence Report lists Magnesium at 23.830434782608698 MG/L. San Diego, City of, 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 Diego, City of, 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/2025/source.