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

Kiowa 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 68th percentile for radon potential — Kiowa County outranks 68% of every county EPA has rated.

Where Kiowa County sits nationally

Kiowa County, Kansas is home to about 2,436 people across 722.64 square miles. That works out to roughly 3 people per square mile. By population, Kiowa County is the 1004th largest of every county sharing its EPA zone — the 6th percentile by population within that zone. Kiowa County falls in EPA Radon Region 7, one of 412 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Kiowa County

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Kiowa County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. Some Kiowa 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.

Testing and mitigation in Kiowa County

For a Kiowa 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 Kiowa County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Kiowa County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Kiowa 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.