What EPA's radon map says about Caldwell County

EPA's own radon map rates Caldwell County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. That puts Caldwell County in the 41st percentile nationally for radon potential — higher than 41% of the counties EPA has rated.

Where Caldwell County sits nationally

About 12,611 people live in Caldwell County, Kentucky, spread over 344.835 square miles. Population density there runs about 37 people per square mile. Among counties sharing Caldwell County's EPA zone, it outranks 25% of them by population. Geologically, Caldwell 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 Caldwell County

Caldwell 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 Caldwell County — testing is the only way to know an individual home's actual level.

If Caldwell County tests above the action level

Mitigation cost doesn't depend on Caldwell 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

Caldwell County's test kit answers today; a Airthings radon monitor keeps answering for Caldwell 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.