Is Hopkins County, KY a radon risk area?

Hopkins 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. Nationally, Hopkins County ranks higher in radon potential than 54% of rated counties (the 54th percentile).

Where Hopkins County sits nationally

About 45,218 people live in Hopkins County, Kentucky, spread over 542.325 square miles. That works out to roughly 83 people per square mile. Rank 366 by population within its EPA zone puts Hopkins County at the 65th percentile among zone peers. Hopkins County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

EPA's Zone 2 rating for Hopkins County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Middle-of-the-pack doesn't mean risk-free for any one Hopkins County address — a moderate county average still leaves individual homes to test either side of it.

If Hopkins County tests above the action level

Nothing about Hopkins 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

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

Hopkins County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.