Metals · 2025
Mercury in San Diego, City of, CA tap water
San Diego, City of, CA's 2025 Consumer Confidence Report tested for Mercury and reported no detectable amount.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Entry point | Not detected UG/L | 2 UG/L MCL |
Highest single sample Other | Not detected UG/L | 2 UG/L MCL |
Highest single sample Source water | Not detected UG/L | 2 UG/L MCL |
Verbatim from San Diego, City of, CA's 2025 Consumer Confidence Report — source document ↗
About Mercury
A toxic metal from erosion of natural deposits and industrial runoff.
Long-term exposure above the federal limit can damage the kidneys.
How San Diego, City of, CA compares
2 of the 192 systems measuring Mercury on The Water Map have it at or above the federal limit:
Nearby systems also reporting Mercury:
People also ask
+Is there Mercury in San Diego, City of, CA tap water?
San Diego, City of, CA's 2025 Consumer Confidence Report tested for Mercury and found no detectable amount.
+What's the federal limit for Mercury in drinking water?
The federal MCL for Mercury is 2 UG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Mercury?
A toxic metal from erosion of natural deposits and industrial runoff. Long-term exposure above the federal limit can damage the kidneys.
+Which other U.S. cities have Mercury over the federal limit?
2 of the 192 systems on The Water Map measuring Mercury report it at or above the federal limit. Examples include St Petersburg, FL, St George, UT.
+Where does this Mercury measurement come from?
This page reproduces the Mercury 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.