What EPA's radon map says about Lane County

EPA's own radon map rates Lane County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally that's the 67th percentile for radon potential — Lane County outranks 67% of every county EPA has rated.

Lane County by the numbers

About 1,482 people live in Lane County, Kansas, spread over 717.409 square miles. That works out to roughly 2 people per square mile. Among counties sharing Lane County's EPA zone, it outranks 2% of them by population. Geologically, Lane 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 Lane County

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Lane County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. Some Lane 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 Lane County tests above the action level

Mitigation cost doesn't depend on Lane County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Kansas's state radon program

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

Lane County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.