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

EPA places Okmulgee County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. That puts Okmulgee County in the 19th percentile nationally for radon potential — higher than 19% of the counties EPA has rated.

How Okmulgee County compares

Okmulgee County, Oklahoma is home to about 37,084 people across 697.443 square miles. Averaged across its land area, Okmulgee County runs about 53 people per square mile. By population, Okmulgee County is the 424th largest of every county sharing its EPA zone — the 59th percentile by population within that zone. Okmulgee 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 Okmulgee County

At Zone 3, Okmulgee 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. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Okmulgee County testing above the action level often enough that skipping a test isn't the safe assumption.

If Okmulgee County tests above the action level

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

Where Okmulgee County's figures come from

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