Is Wilson County, KS a radon risk area?

EPA's own radon map rates Wilson County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally that's the 38th percentile for radon potential — Wilson County outranks 38% of every county EPA has rated.

How Wilson County compares

About 8,398 people live in Wilson County, Kansas, spread over 570.423 square miles. Averaged across its land area, Wilson County runs about 15 people per square mile. Rank 860 by population within its EPA zone puts Wilson County at the 17th percentile among zone peers. Geologically, Wilson 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

EPA's Zone 2 rating for Wilson County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. A county-wide moderate average, like Wilson County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Testing and mitigation in Wilson County

Nothing about Wilson County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Kansas's state radon program

Wilson County's test kit answers today; a Airthings radon monitor keeps answering for Wilson County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Wilson County carries, the zone explainer covers what it does and doesn't tell you about any one house.