Wallace County, KS radon potential

Wallace County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Rank it against the rest of the country and Wallace County lands in the 66th percentile for radon potential.

How Wallace County compares

Wallace County, Kansas is home to about 1,472 people across 913.652 square miles. That works out to roughly 2 people per square mile. Within its own EPA zone, Wallace County is bigger by population than 2% of the counties that share it. Geologically, Wallace County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Wallace 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 Wallace 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 Wallace 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 Kansas's state radon program

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