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

EPA places Woodward 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 Woodward County in the 13th percentile nationally for radon potential — higher than 13% of the counties EPA has rated.

How Woodward County compares

Woodward County, Oklahoma is home to about 19,991 people across 1,242.786 square miles. That works out to roughly 16 people per square mile. By population, Woodward County is the 619th largest of every county sharing its EPA zone — the 40th percentile by population within that zone. Woodward 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 Woodward County

Woodward County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. A Zone 3 label describes Woodward County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Testing and mitigation in Woodward County

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

Where Woodward County's figures come from

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