Is Woods County, OK a radon risk area?

EPA places Woods 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. Nationally that's the 5th percentile for radon potential — Woods County outranks 5% of every county EPA has rated.

Woods County by the numbers

About 8,582 people live in Woods County, Oklahoma, spread over 1,286.482 square miles. Averaged across its land area, Woods County runs about 7 people per square mile. Rank 860 by population within its EPA zone puts Woods County at the 17th percentile among zone peers. Woods County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

At Zone 3, Woods 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, Woods County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Woods County

Nothing about Woods 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

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

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Woods County carries, the zone explainer covers what it does and doesn't tell you about any one house.