Is Hughes County, OK a radon risk area?

Hughes County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally that's the 9th percentile for radon potential — Hughes County outranks 9% of every county EPA has rated.

Hughes County by the numbers

About 13,371 people live in Hughes County, Oklahoma, spread over 804.473 square miles. Population density there runs about 17 people per square mile. Rank 744 by population within its EPA zone puts Hughes County at the 28th percentile among zone peers. EPA's geology-based Region 6 groups Hughes County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Hughes County

Hughes 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. Don't read Zone 3 as a pass for Hughes County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Hughes County

Nothing about Hughes 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

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

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