Is Leon County, TX a radon risk area?

EPA's own radon map rates Leon County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Leon County sits at the 11th percentile nationally for radon potential — above 11 of every 100 rated counties.

Leon County by the numbers

About 16,698 people live in Leon County, Texas, spread over 1,073.156 square miles. That works out to roughly 16 people per square mile. Rank 681 by population within its EPA zone puts Leon County at the 34th percentile among zone peers. Geologically, Leon County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Leon County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Leon County testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in Leon County

Nothing about Leon 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 Texas'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. Use code RADONZONE-10OFF at checkout for 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.