What EPA's radon map says about Wayne County

EPA's own radon map rates Wayne County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Wayne County sits at the 46th percentile nationally for radon potential — above 46 of every 100 rated counties.

How Wayne County compares

About 19,629 people live in Wayne County, Kentucky, spread over 458.043 square miles. That works out to roughly 43 people per square mile. Among counties sharing Wayne County's EPA zone, it outranks 39% of them by population. Wayne 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, Wayne County's Zone 2 prediction lands in the gap between the two. Wayne 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 Wayne County

Mitigation cost doesn't depend on Wayne 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 Kentucky's state radon program

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Wayne County carries, the zone explainer covers what it does and doesn't tell you about any one house.