Is Daviess County, IN a radon risk area?

EPA's own radon map rates Daviess County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Daviess County ranks higher in radon potential than 52% of rated counties (the 52nd percentile).

Where Daviess County sits nationally

About 34,097 people live in Daviess County, Indiana, spread over 429.514 square miles. Population density there runs about 79 people per square mile. Rank 450 by population within its EPA zone puts Daviess County at the 56th percentile among zone peers. Daviess County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

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. Daviess 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 Daviess County

Nothing about Daviess County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Indiana's state radon program

Daviess County's test kit answers today; a Airthings radon monitor keeps answering for Daviess County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

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.