Wayne County, IN radon potential

Wayne County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally, Wayne County ranks higher in radon potential than 92% of rated counties (the 92nd percentile).

Where Wayne County sits nationally

Wayne County, Indiana is home to about 66,410 people across 401.755 square miles. That works out to roughly 165 people per square mile. Within its own EPA zone, Wayne County is bigger by population than 76% of the counties that share it. Wayne County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Wayne County

Where the national indoor average runs about 1.3 pCi/L, Wayne County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Wayne County specifically.

If Wayne County tests above the action level

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 Indiana's state radon program

For Wayne County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Wayne 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 Wayne 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.