What EPA's radon map says about Pottawatomie County

Pottawatomie County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 84th percentile for radon potential — Pottawatomie County outranks 84% of every county EPA has rated.

Pottawatomie County by the numbers

About 26,876 people live in Pottawatomie County, Kansas, spread over 840.735 square miles. Population density there runs about 32 people per square mile. Among counties sharing Pottawatomie County's EPA zone, it outranks 54% of them by population. Geologically, Pottawatomie 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 Pottawatomie County

Where the national indoor average runs about 1.3 pCi/L, Pottawatomie County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Pottawatomie County will test well under the action level, and EPA's guidance is to test regardless of zone.

Next steps for a home in Pottawatomie County

Mitigation cost doesn't depend on Pottawatomie 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

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.