Is McCurtain County, OK a radon risk area?

McCurtain County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. McCurtain County sits at the 18th percentile nationally for radon potential — above 18 of every 100 rated counties.

Where McCurtain County sits nationally

About 30,805 people live in McCurtain County, Oklahoma, spread over 1,850.782 square miles. Averaged across its land area, McCurtain County runs about 17 people per square mile. Rank 474 by population within its EPA zone puts McCurtain County at the 54th percentile among zone peers. Geologically, McCurtain 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 McCurtain County

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, McCurtain County's Zone 3 prediction is the low end of the scale. Even at Zone 3, McCurtain 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 McCurtain County

Nothing about McCurtain County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Oklahoma's state radon program

McCurtain County's test kit answers today; a Airthings radon monitor keeps answering for McCurtain County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

McCurtain 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.