Mayes County, OK: EPA's radon zone, explained

Mayes County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Nationally, Mayes County ranks higher in radon potential than 53% of rated counties (the 53rd percentile).

Where Mayes County sits nationally

Mayes County, Oklahoma is home to about 40,144 people across 655.326 square miles. Averaged across its land area, Mayes County runs about 61 people per square mile. By population, Mayes County is the 399th largest of every county sharing its EPA zone — the 61st percentile by population within that zone. Mayes 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 Mayes County

Mayes County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Nothing about a Zone 2 label lowers the case for testing in Mayes County — EPA recommends it in every zone, moderate included.

Next steps for a home in Mayes County

For a Mayes County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Oklahoma's state radon program

For Mayes County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Mayes 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 Mayes County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Mayes County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.