Steuben County, IN radon potential

Steuben County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Steuben County sits at the 86th percentile nationally for radon potential — above 86 of every 100 rated counties.

Steuben County by the numbers

Steuben County, Indiana is home to about 34,862 people across 308.79 square miles. Averaged across its land area, Steuben County runs about 113 people per square mile. Within its own EPA zone, Steuben County is bigger by population than 60% of the counties that share it. Geologically, Steuben County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

What this actually means for a house in Steuben County

Steuben County carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. Being in Zone 1 raises the odds Steuben County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.

Testing and mitigation in Steuben 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 Steuben County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Steuben 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 Steuben 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.