Cherokee County holds the EPA's Zone 1 designation, the highest radon risk classification in the country, with predicted average indoor radon levels above 4 pCi/L. Local testing data shows that approximately 28–38% of homes tested in the Canton area exceed the EPA's action level of 4 pCi/L. The good news: radon is detectable, treatable, and negotiable. A test during your due diligence period reveals the risk, and mitigation — if needed — typically runs $800–$2,000 in Cherokee County.