Metals · 2026
Magnesium in San Diego, City of, CA tap water
San Diego, City of, CA's 2026 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 | 19.066666666666666 MG/L | None set |
Average Other | 18.733333333333334 MG/L | None set |
Average Source water | 22.1625 MG/L | None set |
Highest single sample Entry point | 23.2 MG/L | None set |
Highest single sample Other | 22.8 MG/L | None set |
Highest single sample Source water | 25.8 MG/L | None set |
Verbatim from San Diego, City of, CA's 2026 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 2026 Consumer Confidence Report lists Magnesium at 22.1625 MG/L. San Diego, City of, CA's 2026 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 2026 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/2026/source.