What EPA's radon map says about Haskell County

Haskell County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Haskell County lands in the 8th percentile for radon potential.

Haskell County by the numbers

About 11,811 people live in Haskell County, Oklahoma, spread over 576.725 square miles. Population density there runs about 20 people per square mile. Among counties sharing Haskell County's EPA zone, it outranks 25% of them by population. Haskell County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Haskell 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 Haskell County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Haskell County tests above the action level

Mitigation cost doesn't depend on Haskell 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

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

Haskell 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.