What EPA's radon map says about Leon County

EPA places Leon County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. That puts Leon County in the 64th percentile nationally for radon potential — higher than 64% of the counties EPA has rated.

How Leon County compares

About 300,488 people live in Leon County, Florida, spread over 668.428 square miles. Population density there runs about 450 people per square mile. Among counties sharing Leon County's EPA zone, it outranks 93% of them by population. Geologically, Leon County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

What this actually means for a house in Leon County

Leon County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Leon County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Next steps for a home in Leon County

Mitigation cost doesn't depend on Leon 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

Leon County's test kit answers today; a Airthings radon monitor keeps answering for Leon 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

Leon County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.