What EPA's radon map says about Kearny County

EPA places Kearny 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 that's the 69th percentile for radon potential — Kearny County outranks 69% of every county EPA has rated.

Where Kearny County sits nationally

About 3,808 people live in Kearny County, Kansas, spread over 870.543 square miles. Population density there runs about 4 people per square mile. Among counties sharing Kearny County's EPA zone, it outranks 10% of them by population. EPA's geology-based Region 7 groups Kearny County with 411 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Kearny County

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Kearny County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. Being in Zone 1 raises the odds Kearny 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 Kearny County

Mitigation cost doesn't depend on Kearny 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

Kearny County's test kit answers today; a Airthings radon monitor keeps answering for Kearny 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 Kearny County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.