Wabash County, IN: EPA's radon zone, explained

Wabash County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 85th percentile for radon potential — Wabash County outranks 85% of every county EPA has rated.

Wabash County by the numbers

Wabash County, Indiana is home to about 30,777 people across 412.539 square miles. That works out to roughly 75 people per square mile. By population, Wabash County is the 460th largest of every county sharing its EPA zone — the 57th percentile by population within that zone. EPA's geology-based Region 5 groups Wabash County with 523 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Where the national indoor average runs about 1.3 pCi/L, Wabash County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Wabash County will test well under the action level, and EPA's guidance is to test regardless of zone.

Testing and mitigation in Wabash County

For a Wabash County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Indiana's state radon program

For Wabash County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Wabash 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 Wabash 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. Whatever zone Wabash County carries, the zone explainer covers what it does and doesn't tell you about any one house.