Magoffin County, KY radon potential
EPA places Magoffin 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 Magoffin County in the 40th percentile nationally for radon potential — higher than 40% of the counties EPA has rated.
Where Magoffin County sits nationally
Magoffin County, Kentucky is home to about 11,118 people across 308.443 square miles. That works out to roughly 36 people per square mile. Within its own EPA zone, Magoffin County is bigger by population than 23% of the counties that share it. EPA's geology-based Region 4 groups Magoffin County with 735 other counties nationally sharing its underlying rock and soil profile.
Why the zone isn't the answer by itself
Magoffin 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). A county-wide moderate average, like Magoffin 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 Magoffin 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 Magoffin County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Magoffin County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.
Where Magoffin County's figures come from
The methodology guide shows exactly which EPA and Census sources feed Magoffin County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.