Radionuclides · 2025
Combined Radium in Chattanooga, TN tap water
Chattanooga, TN's 2025 Consumer Confidence Report shows Combined Radium at or above the federal limit. Measured value is 1.0× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level System-wide | 0 pCi/L | None set |
Reported level System-wide | 5 pCi/L | None set |
Reported level System-wide | 1.08 pCi/L | None set |
Reported level System-wide | 1.08 pCi/L | None set |
Reported level System-wide | 1.08 pCi/L | None set |
Reported level System-wide | 0 pCi/L | None set |
Reported level System-wide | 5 pCi/L | None set |
Reported level System-wide | 1.08 pCi/L | None set |
Verbatim from Chattanooga, TN's 2025 Consumer Confidence Report — source document ↗
About Combined Radium
Combined radium-226 and radium-228 — naturally occurring radioactive elements.
Long-term exposure above the federal limit increases the risk of bone cancer.
How Chattanooga, TN compares
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People also ask
+Is there Combined Radium in Chattanooga, TN tap water?
Yes — Chattanooga, TN's 2025 Consumer Confidence Report lists Combined Radium at 5 pCi/L. Chattanooga, TN's 2025 Consumer Confidence Report shows Combined Radium at or above the federal limit. Measured value is 1.0× the threshold.
+What's the federal limit for Combined Radium in drinking water?
The EPA has not set an enforceable federal limit for Combined Radium. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Combined Radium?
Combined radium-226 and radium-228 — naturally occurring radioactive elements. Long-term exposure above the federal limit increases the risk of bone cancer.
+Where does this Combined Radium measurement come from?
This page reproduces the Combined Radium entry from the 2025 Consumer Confidence Report published by the Chattanooga, TN 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/tn/chattanooga/2025/source.