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

Finney County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Finney County sits at the 88th percentile nationally for radon potential — above 88 of every 100 rated counties.

How Finney County compares

Finney County, Kansas is home to about 38,354 people across 1,301.997 square miles. Averaged across its land area, Finney County runs about 29 people per square mile. By population, Finney County is the 390th largest of every county sharing its EPA zone — the 63rd percentile by population within that zone. EPA's geology-based Region 7 groups Finney County with 411 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Finney 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. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Finney County specifically.

If Finney County tests above the action level

For a Finney 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 Finney County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Finney 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 Finney County's figures come from

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