Payne County, OK Radon Zone Data

Payne County, OK radon potential

EPA's own radon map rates Payne County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Payne County sits at the 25th percentile nationally for radon potential — above 25 of every 100 rated counties.

Payne County by the numbers

Payne County, Oklahoma is home to about 84,199 people across 684.901 square miles. That works out to roughly 123 people per square mile. Within its own EPA zone, Payne County is bigger by population than 77% of the counties that share it. Geologically, Payne County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

What this actually means for a house in Payne County

At Zone 3, Payne 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. A Zone 3 rating means Payne County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Next steps for a home in Payne County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Oklahoma's state radon program

For Payne County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Payne County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Payne County's figures come from

Payne County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.