Fayette County, IN radon potential

EPA's own radon map rates Fayette County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally, Fayette County ranks higher in radon potential than 83% of rated counties (the 83rd percentile).

How Fayette County compares

Fayette County, Indiana is home to about 23,335 people across 215.021 square miles. Population density there runs about 109 people per square mile. Within its own EPA zone, Fayette County is bigger by population than 50% of the counties that share it. Fayette 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 Fayette County

Where the national indoor average runs about 1.3 pCi/L, Fayette 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 Fayette County specifically.

Testing and mitigation in Fayette 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 Indiana's state radon program

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

Where Fayette County's figures come from

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