Is Greenwood County, KS a radon risk area?

EPA places Greenwood County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Greenwood County ranks higher in radon potential than 36% of rated counties (the 36th percentile).

How Greenwood County compares

About 5,871 people live in Greenwood County, Kansas, spread over 1,143.304 square miles. Averaged across its land area, Greenwood County runs about 5 people per square mile. Rank 924 by population within its EPA zone puts Greenwood County at the 10th percentile among zone peers. Geologically, Greenwood 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 Greenwood County

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 Greenwood County's Zone 2 prediction. Greenwood County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Next steps for a home in Greenwood County

Nothing about Greenwood 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

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

More on how this number was built

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