Is Mitchell County, KS a radon risk area?
EPA places Mitchell County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Mitchell County sits at the 72nd percentile nationally for radon potential — above 72 of every 100 rated counties.
How Mitchell County compares
About 5,803 people live in Mitchell County, Kansas, spread over 701.792 square miles. Averaged across its land area, Mitchell County runs about 8 people per square mile. Rank 889 by population within its EPA zone puts Mitchell County at the 17th percentile among zone peers. Geologically, Mitchell County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.
What this actually means for a house in Mitchell County
Where the national indoor average runs about 1.3 pCi/L, Mitchell County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. Being in Zone 1 raises the odds Mitchell County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.
Next steps for a home in Mitchell County
Nothing about Mitchell 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
Mitchell County's test kit answers today; a Airthings radon monitor keeps answering for Mitchell 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
The methodology guide shows exactly which EPA and Census sources feed Mitchell County's numbers. Whatever zone Mitchell County carries, the zone explainer covers what it does and doesn't tell you about any one house.