Radionuclides · 2024
Combined Radium in Ontario, CA tap water
Ontario, CA's 2024 report shows Combined Radium detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Source water | 0.291 PCI/L | None set |
Average Source water | 0.056674999999999996 PCI/L | None set |
Verbatim from Ontario, CA's 2024 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 Ontario, CA compares
5 of the 252 systems measuring Combined Radium on The Water Map have it at or above the federal limit:
Nearby systems also reporting Combined Radium:
People also ask
+Is there Combined Radium in Ontario, CA tap water?
Yes — Ontario, CA's 2024 Consumer Confidence Report lists Combined Radium at 0.056674999999999996 PCI/L. Ontario, CA's 2024 report shows Combined Radium detected, but the EPA has not set an enforceable federal limit for it.
+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.
+Which other U.S. cities have Combined Radium over the federal limit?
5 of the 252 systems on The Water Map measuring Combined Radium report it at or above the federal limit. Examples include West Covina, CA, Albuquerque, NM, City of Baltimore, MD.
+Where does this Combined Radium measurement come from?
This page reproduces the Combined Radium entry from the 2024 Consumer Confidence Report published by the Ontario, 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/ontario/2024/source.