Is DeSoto County, FL a radon risk area?

DeSoto 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 DeSoto County in the 19th percentile nationally for radon potential — higher than 19% of the counties EPA has rated.

Where DeSoto County sits nationally

About 36,744 people live in DeSoto County, Florida, spread over 636.695 square miles. Averaged across its land area, DeSoto County runs about 58 people per square mile. Rank 427 by population within its EPA zone puts DeSoto County at the 59th percentile among zone peers. EPA's geology-based Region 4 groups DeSoto County with 735 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in DeSoto County

DeSoto 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 DeSoto County testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in DeSoto County

Nothing about DeSoto County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Florida's state radon program

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

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.