Radionuclides · 2025
Uranium in San Diego, City of, CA tap water
San Diego, City of, CA's 2025 Consumer Confidence Report shows Uranium at or above the federal limit (20 PCI/L MCL). Measured value is 3.3× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Source water | 66 PCI/L | 20 PCI/L MCL |
Average Other | 2.3 PCI/L | 20 PCI/L MCL |
Average Entry point | 2.2 PCI/L | 20 PCI/L MCL |
Highest single sample Other | 2.3 PCI/L | 20 PCI/L MCL |
Highest single sample Source water | 66 PCI/L | 20 PCI/L MCL |
Highest single sample Entry point | 2.2 PCI/L | 20 PCI/L MCL |
Verbatim from San Diego, City of, CA's 2025 Consumer Confidence Report — source document ↗
About Uranium
A naturally occurring radioactive metal from erosion of natural deposits.
Long-term exposure above the federal limit can damage the kidneys and increase cancer risk.
How San Diego, City of, CA compares
1 of the 186 systems measuring Uranium on The Water Map have it at or above the federal limit:
Nearby systems also reporting Uranium:
People also ask
+Is there Uranium in San Diego, City of, CA tap water?
Yes — San Diego, City of, CA's 2025 Consumer Confidence Report lists Uranium at 66 PCI/L. San Diego, City of, CA's 2025 Consumer Confidence Report shows Uranium at or above the federal limit (20 PCI/L MCL). Measured value is 3.3× the threshold.
+What's the federal limit for Uranium in drinking water?
The federal MCL for Uranium is 20 PCI/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Uranium?
A naturally occurring radioactive metal from erosion of natural deposits. Long-term exposure above the federal limit can damage the kidneys and increase cancer risk.
+Which other U.S. cities have Uranium over the federal limit?
1 of the 186 systems on The Water Map measuring Uranium report it at or above the federal limit. Examples include Albuquerque, NM.
+Where does this Uranium measurement come from?
This page reproduces the Uranium 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.