Is Whitley County, KY a radon risk area?

Whitley County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Whitley County sits at the 53rd percentile nationally for radon potential — above 53 of every 100 rated counties.

Whitley County by the numbers

About 37,233 people live in Whitley County, Kentucky, spread over 437.921 square miles. Averaged across its land area, Whitley County runs about 85 people per square mile. Rank 421 by population within its EPA zone puts Whitley County at the 59th percentile among zone peers. Whitley County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Whitley County's Zone 2 prediction lands in the gap between the two. A county-wide moderate average, like Whitley County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Testing and mitigation in Whitley County

Nothing about Whitley 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 Kentucky's state radon program

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

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