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

EPA places Daviess 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. Nationally that's the 60th percentile for radon potential — Daviess County outranks 60% of every county EPA has rated.

Daviess County by the numbers

Daviess County, Kentucky is home to about 104,457 people across 458.398 square miles. That works out to roughly 228 people per square mile. By population, Daviess County is the 194th largest of every county sharing its EPA zone — the 81st percentile by population within that zone. Daviess County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Daviess County's Zone 2 prediction lands in the gap between the two. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Daviess County — testing is the only way to know an individual home's actual level.

If Daviess County tests above the action level

For a Daviess 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 Daviess County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Daviess 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 Daviess 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.