Is Coffey County, KS a radon risk area?

EPA's own radon map rates Coffey County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Rank it against the rest of the country and Coffey County lands in the 38th percentile for radon potential.

Coffey County by the numbers

About 8,301 people live in Coffey County, Kansas, spread over 626.885 square miles. Population density there runs about 13 people per square mile. Rank 862 by population within its EPA zone puts Coffey County at the 16th percentile among zone peers. EPA's geology-based Region 7 groups Coffey County with 411 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Coffey County's Zone 2 prediction. A county-wide moderate average, like Coffey County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in Coffey County

Nothing about Coffey 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

Coffey County's test kit answers today; a Airthings radon monitor keeps answering for Coffey County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.