Huntington County, IN radon potential
Huntington County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally, Huntington County ranks higher in radon potential than 87% of rated counties (the 87th percentile).
Huntington County by the numbers
Huntington County, Indiana is home to about 36,944 people across 382.639 square miles. Population density there runs about 97 people per square mile. Within its own EPA zone, Huntington County is bigger by population than 62% of the counties that share it. Huntington County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.
Why the zone isn't the answer by itself
Huntington County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. Some Huntington County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.
Next steps for a home in Huntington 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 Huntington County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Huntington 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 Huntington 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.