Wichita County, KS: EPA's radon zone, explained

EPA places Wichita County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Wichita County ranks higher in radon potential than 67% of rated counties (the 67th percentile).

How Wichita County compares

Wichita County, Kansas is home to about 2,072 people across 718.566 square miles. That works out to roughly 3 people per square mile. By population, Wichita County is the 1028th largest of every county sharing its EPA zone — the 3rd percentile by population within that zone. Geologically, Wichita County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

What this actually means for a house in Wichita County

Where the national indoor average runs about 1.3 pCi/L, Wichita County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. That doesn't mean every Wichita County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

Testing and mitigation in Wichita County

For a Wichita 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 Kansas's state radon program

For Wichita County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Wichita 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 Wichita 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.