Boyle County, KY radon potential

EPA places Boyle County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Boyle County ranks higher in radon potential than 86% of rated counties (the 86th percentile).

Where Boyle County sits nationally

Boyle County, Kentucky is home to about 31,394 people across 180.336 square miles. Averaged across its land area, Boyle County runs about 174 people per square mile. Within its own EPA zone, Boyle County is bigger by population than 58% of the counties that share it. Geologically, Boyle County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Boyle County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Boyle County will test well under the action level, and EPA's guidance is to test regardless of zone.

Testing and mitigation in Boyle 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 Boyle County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Boyle 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 Boyle County's figures come from

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