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

EPA's own radon map rates Kiowa County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Kiowa County sits at the 66th percentile nationally for radon potential — above 66 of every 100 rated counties.

Where Kiowa County sits nationally

Kiowa County, Colorado is home to about 1,392 people across 1,767.809 square miles. Averaged across its land area, Kiowa County runs about 1 people per square mile. By population, Kiowa County is the 1052nd largest of every county sharing its EPA zone — the 1st percentile by population within that zone. Kiowa County falls in EPA Radon Region 8, one of 291 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Kiowa 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. That doesn't mean every Kiowa 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 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 Colorado'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. Use code RADONZONE-10OFF at checkout for 10% off.

Where Kiowa County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Kiowa County's numbers. Whatever zone Kiowa County carries, the zone explainer covers what it does and doesn't tell you about any one house.