What EPA's radon map says about Concho County

EPA places Concho County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. That puts Concho County in the 2nd percentile nationally for radon potential — higher than 2% of the counties EPA has rated.

Concho County by the numbers

About 3,326 people live in Concho County, Texas, spread over 983.755 square miles. Averaged across its land area, Concho County runs about 3 people per square mile. Among counties sharing Concho County's EPA zone, it outranks 6% of them by population. Geologically, Concho County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

What this actually means for a house in Concho County

Concho 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. A Zone 3 label describes Concho County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Concho County

Mitigation cost doesn't depend on Concho 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 Texas's state radon program

Concho County's test kit answers today; a Airthings radon monitor keeps answering for Concho 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. Whatever zone Concho County carries, the zone explainer covers what it does and doesn't tell you about any one house.