What EPA's radon map says about Fayette County

EPA's own radon map rates Fayette County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Fayette County in the 16th percentile nationally for radon potential — higher than 16% of the counties EPA has rated.

Fayette County by the numbers

About 25,488 people live in Fayette County, Texas, spread over 949.934 square miles. That works out to roughly 27 people per square mile. Among counties sharing Fayette County's EPA zone, it outranks 48% of them by population. Fayette County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Fayette County

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Fayette County's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Fayette County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Testing and mitigation in Fayette County

Mitigation cost doesn't depend on Fayette 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

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

The methodology guide shows exactly which EPA and Census sources feed Fayette County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.