Radionuclides · 2024
Radon in Santa Rosa, CA tap water
Santa Rosa, CA's 2024 Consumer Confidence Report shows Radon at or above the federal limit (100 pCi/L MCL). Measured value is 4.5× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Santa Rosa | 450 pCi/L | 100 pCi/L MCL |
Reported level Sonoma Water | 132.8 pCi/L | 100 pCi/L MCL |
Range Sonoma Water | 96.1–177 pCi/L | 100 pCi/L MCL |
Range Santa Rosa | 445–455 pCi/L | 100 pCi/L MCL |
Verbatim from Santa Rosa, CA's 2024 Consumer Confidence Report — source document ↗
About Radon
A naturally occurring radioactive gas that can dissolve into groundwater.
No enforceable federal limit in drinking water yet; inhalation of released radon raises lung-cancer risk.
How Santa Rosa, CA compares
Nearby systems also reporting Radon:
People also ask
+Is there Radon in Santa Rosa, CA tap water?
Yes — Santa Rosa, CA's 2024 Consumer Confidence Report lists Radon at 445–455 pCi/L. Santa Rosa, CA's 2024 Consumer Confidence Report shows Radon at or above the federal limit (100 pCi/L MCL). Measured value is 4.5× the threshold.
+What's the federal limit for Radon in drinking water?
The federal MCL for Radon is 100 pCi/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Radon?
A naturally occurring radioactive gas that can dissolve into groundwater. No enforceable federal limit in drinking water yet; inhalation of released radon raises lung-cancer risk.
+Where does this Radon measurement come from?
This page reproduces the Radon entry from the 2024 Consumer Confidence Report published by the Santa Rosa, 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/santa-rosa/2024/source.