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

EPA places Rowan 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 Rowan County in the 48th percentile nationally for radon potential — higher than 48% of the counties EPA has rated.

Where Rowan County sits nationally

Rowan County, Kentucky is home to about 24,675 people across 279.881 square miles. Averaged across its land area, Rowan County runs about 88 people per square mile. By population, Rowan County is the 556th largest of every county sharing its EPA zone — the 46th percentile by population within that zone. Rowan County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Rowan County's Zone 2 prediction. A county-wide moderate average, like Rowan 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 Rowan County

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

Where Rowan County's figures come from

Rowan 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.