Vanderburgh County, IN radon potential

EPA's own radon map rates Vanderburgh County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Rank it against the rest of the country and Vanderburgh County lands in the 62nd percentile for radon potential.

How Vanderburgh County compares

Vanderburgh County, Indiana is home to about 180,387 people across 233.402 square miles. That works out to roughly 773 people per square mile. Within its own EPA zone, Vanderburgh County is bigger by population than 87% of the counties that share it. Geologically, Vanderburgh County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Vanderburgh County's Zone 2 prediction lands in the gap between the two. Vanderburgh County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

If Vanderburgh 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 Vanderburgh County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Vanderburgh 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 Vanderburgh County's figures come from

Vanderburgh County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.