What EPA's radon map says about Charlotte County

Charlotte County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. That puts Charlotte County in the 29th percentile nationally for radon potential — higher than 29% of the counties EPA has rated.

Where Charlotte County sits nationally

About 212,122 people live in Charlotte County, Florida, spread over 681.149 square miles. That works out to roughly 311 people per square mile. Among counties sharing Charlotte County's EPA zone, it outranks 88% of them by population. Charlotte County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Charlotte County

Charlotte County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Charlotte County testing above the action level often enough that skipping a test isn't the safe assumption.

If Charlotte County tests above the action level

Mitigation cost doesn't depend on Charlotte County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Florida's state radon program

Charlotte County's test kit answers today; a Airthings radon monitor keeps answering for Charlotte County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.