What EPA's radon map says about Henry County

EPA places Henry County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Henry County sits at the 44th percentile nationally for radon potential — above 44 of every 100 rated counties.

Where Henry County sits nationally

About 16,198 people live in Henry County, Kentucky, spread over 286.251 square miles. That works out to roughly 57 people per square mile. Among counties sharing Henry County's EPA zone, it outranks 33% of them by population. Geologically, Henry County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

What this actually means for a house in Henry County

Henry County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Henry County — testing is the only way to know an individual home's actual level.

Next steps for a home in Henry County

Mitigation cost doesn't depend on Henry 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

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

Henry County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Henry County carries, the zone explainer covers what it does and doesn't tell you about any one house.