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State overview

Radon in Oklahoma

Of Oklahoma's 77 counties and county equivalents, EPA places 9 in Zone 2, 68 in Zone 3. Zones are county-wide predictions; testing is the only way to know your home's level.

Radon in the news

Oklahoma stories

Headlines link to the original publishers via Google News. Updated 2026-10-27.

All 77 counties

CountyEPA zone
Adair CountyZone 2
Alfalfa CountyZone 3
Atoka CountyZone 3
Beaver CountyZone 2
Beckham CountyZone 3
Blaine CountyZone 3
Bryan CountyZone 3
Caddo CountyZone 3
Canadian CountyZone 3
Carter CountyZone 3
Cherokee CountyZone 2
Choctaw CountyZone 3
Cimarron CountyZone 2
Cleveland CountyZone 3
Coal CountyZone 3
Comanche CountyZone 3
Cotton CountyZone 3
Craig CountyZone 3
Creek CountyZone 3
Custer CountyZone 3
Delaware CountyZone 2
Dewey CountyZone 3
Ellis CountyZone 2
Garfield CountyZone 3
Garvin CountyZone 3
Grady CountyZone 3
Grant CountyZone 3
Greer CountyZone 3
Harmon CountyZone 3
Harper CountyZone 3
Haskell CountyZone 3
Hughes CountyZone 3
Jackson CountyZone 3
Jefferson CountyZone 3
Johnston CountyZone 3
Kay CountyZone 3
Kingfisher CountyZone 3
Kiowa CountyZone 3
Latimer CountyZone 3
Le Flore CountyZone 3
Lincoln CountyZone 3
Logan CountyZone 3
Love CountyZone 3
Major CountyZone 3
Marshall CountyZone 3
Mayes CountyZone 2
McClain CountyZone 3
McCurtain CountyZone 3
McIntosh CountyZone 3
Murray CountyZone 3
Muskogee CountyZone 3
Noble CountyZone 3
Nowata CountyZone 3
Okfuskee CountyZone 3
Oklahoma CountyZone 3
Okmulgee CountyZone 3
Osage CountyZone 3
Ottawa CountyZone 3
Pawnee CountyZone 3
Payne CountyZone 3
Pittsburg CountyZone 3
Pontotoc CountyZone 3
Pottawatomie CountyZone 3
Pushmataha CountyZone 3
Roger Mills CountyZone 3
Rogers CountyZone 3
Seminole CountyZone 3
Sequoyah CountyZone 2
Stephens CountyZone 3
Texas CountyZone 2
Tillman CountyZone 3
Tulsa CountyZone 3
Wagoner CountyZone 3
Washington CountyZone 3
Washita CountyZone 3
Woods CountyZone 3
Woodward CountyZone 3

Source: EPA radon zones spreadsheet (EPA 402/A-16/001).