What EPA's radon map says about Neosho County

EPA places Neosho 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. Neosho County sits at the 43rd percentile nationally for radon potential — above 43 of every 100 rated counties.

Where Neosho County sits nationally

About 15,552 people live in Neosho County, Kansas, spread over 571.481 square miles. That works out to roughly 27 people per square mile. Among counties sharing Neosho County's EPA zone, it outranks 32% of them by population. Geologically, Neosho County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

Zone vs. an actual test

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 Neosho County's Zone 2 prediction. Nothing about a Zone 2 label lowers the case for testing in Neosho County — EPA recommends it in every zone, moderate included.

Next steps for a home in Neosho County

Mitigation cost doesn't depend on Neosho 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

Neosho County's test kit answers today; a Airthings radon monitor keeps answering for Neosho 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 Neosho County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.