Is Gallatin County, KY a radon risk area?

EPA places Gallatin 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. That puts Gallatin County in the 39th percentile nationally for radon potential — higher than 39% of the counties EPA has rated.

Where Gallatin County sits nationally

About 8,805 people live in Gallatin County, Kentucky, spread over 98.282 square miles. Averaged across its land area, Gallatin County runs about 90 people per square mile. Rank 845 by population within its EPA zone puts Gallatin County at the 18th percentile among zone peers. EPA's geology-based Region 4 groups Gallatin County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

EPA's Zone 2 rating for Gallatin County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. A county-wide moderate average, like Gallatin County's, can still hide a specific house well above or below it — testing is what actually answers the question.

If Gallatin County tests above the action level

Nothing about Gallatin 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

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

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