Is Russell County, KS a radon risk area?

EPA places Russell 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. Nationally, Russell County ranks higher in radon potential than 73% of rated counties (the 73rd percentile).

How Russell County compares

About 6,620 people live in Russell County, Kansas, spread over 886.26 square miles. Averaged across its land area, Russell County runs about 7 people per square mile. Rank 860 by population within its EPA zone puts Russell County at the 19th percentile among zone peers. Russell County falls in EPA Radon Region 7, one of 412 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Russell 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. Some Russell County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

If Russell County tests above the action level

Nothing about Russell 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

Russell County's test kit answers today; a Airthings radon monitor keeps answering for Russell 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

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