What EPA's radon map says about Kingfisher County

Kingfisher County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Kingfisher County ranks higher in radon potential than 11% of rated counties (the 11th percentile).

How Kingfisher County compares

About 15,820 people live in Kingfisher County, Oklahoma, spread over 898.092 square miles. Population density there runs about 18 people per square mile. Among counties sharing Kingfisher County's EPA zone, it outranks 32% of them by population. EPA's geology-based Region 6 groups Kingfisher County with 502 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Kingfisher County's Zone 3 prediction is the low end of the scale. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Kingfisher County testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in Kingfisher County

Mitigation cost doesn't depend on Kingfisher County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Oklahoma's state radon program

Kingfisher County's test kit answers today; a Airthings radon monitor keeps answering for Kingfisher 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

The methodology guide shows exactly which EPA and Census sources feed Kingfisher County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.