What EPA's radon map says about Pottawatomie County

Pottawatomie County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. That puts Pottawatomie County in the 25th percentile nationally for radon potential — higher than 25% of the counties EPA has rated.

Pottawatomie County by the numbers

About 74,446 people live in Pottawatomie County, Oklahoma, spread over 787.816 square miles. That works out to roughly 94 people per square mile. Among counties sharing Pottawatomie County's EPA zone, it outranks 75% of them by population. Pottawatomie County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Pottawatomie County

At Zone 3, Pottawatomie County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Even at Zone 3, Pottawatomie County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Testing and mitigation 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 Oklahoma'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. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

Pottawatomie County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Pottawatomie County carries, the zone explainer covers what it does and doesn't tell you about any one house.