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A Homeowner's Guide to Radon Reduction St Charles
@radonreductionstcharlespoint · 10 October 2026
I have been in the radon testing and mitigation field for over a decade, and I can tell you that the geology of St. Charles County makes it a serious area for radon gas. The EPA has designated this part of Missouri as Radon Zone 1, which means the average indoor radon level here is predicted to be at or above the action level of 4 picocuries per liter. That is not a scare tactic; it is a data point. I have seen too many homeowners in St. Charles, O'Fallon, St. Peters, and We
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