Nicholas County, KY: EPA's radon zone, explained

Nicholas 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 that's the 38th percentile for radon potential — Nicholas County outranks 38% of every county EPA has rated.

Nicholas County by the numbers

Nicholas County, Kentucky is home to about 7,816 people across 195.306 square miles. That works out to roughly 40 people per square mile. By population, Nicholas County is the 877th largest of every county sharing its EPA zone — the 15th percentile by population within that zone. EPA's geology-based Region 4 groups Nicholas County with 735 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

EPA's Zone 2 rating for Nicholas 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 Nicholas County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in Nicholas County

For a Nicholas County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Kentucky's state radon program

For Nicholas County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Nicholas County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Nicholas County's figures come from

Nicholas 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.