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

Todd 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, Todd County ranks higher in radon potential than 41% of rated counties (the 41st percentile).

Todd County by the numbers

Todd County, Kentucky is home to about 12,757 people across 374.518 square miles. Averaged across its land area, Todd County runs about 34 people per square mile. By population, Todd County is the 767th largest of every county sharing its EPA zone — the 26th percentile by population within that zone. Todd 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 Todd County's Zone 2 prediction. Todd County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Next steps for a home in Todd County

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

Where Todd County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Todd County's numbers. Whatever zone Todd County carries, the zone explainer covers what it does and doesn't tell you about any one house.