Indiana County, PA radon potential

EPA's own radon map rates Indiana County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. That puts Indiana County in the 93rd percentile nationally for radon potential — higher than 93% of the counties EPA has rated.

How Indiana County compares

Indiana County, Pennsylvania is home to about 82,953 people across 827.394 square miles. Averaged across its land area, Indiana County runs about 100 people per square mile. Within its own EPA zone, Indiana County is bigger by population than 79% of the counties that share it. Indiana County falls in EPA Radon Region 3, one of 245 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Indiana County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. Some Indiana 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.

Testing and mitigation in Indiana 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 Pennsylvania's state radon program

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