Estill County, KY radon potential

EPA places Estill 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 Estill County in the 42nd percentile nationally for radon potential — higher than 42% of the counties EPA has rated.

Estill County by the numbers

Estill County, Kentucky is home to about 14,002 people across 253.081 square miles. That works out to roughly 55 people per square mile. Within its own EPA zone, Estill County is bigger by population than 29% of the counties that share it. Estill County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Estill County

Estill County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). Middle-of-the-pack doesn't mean risk-free for any one Estill County address — a moderate county average still leaves individual homes to test either side of it.

Next steps for a home in Estill County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Kentucky's state radon program

For Estill County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Estill 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 Estill County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Estill County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.