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Radon Levels, Testing and Mitigation in Oklahoma

Oklahoma has 77 counties, with 0 classified as EPA Zone 1 (highest risk). With an average radon level of 7 pCi/L, Oklahoma state testing data reveals significantly elevated risks across multiple counties. Testing is highly recommended.

Oklahoma is the 20th most expansive state in terms of size and the 28th most populous in the entire US.

Oklahoma does have an active radon program, dedicated to educating citizens about the risks associated with the deadly gas. You can find more information on Radon, testing and mitigation at the official page.

7
Avg. pCi/L
77
Counties
Zone 1 Counties

Oklahoma Radon Map

Oklahoma radon levels by county
Zone 1 — High
Zone 2 — Moderate
Zone 3 — Low

Oklahoma Metro Areas

Explore radon data organized by metro region, including average levels, hotspot cities, and local mitigation professionals.

Fort Smith Metro
5 cities
Oklahoma City Metro
5 cities
Tulsa Metro
5 cities

Most Active Radon Markets in Oklahoma

Cities with the most user-submitted radon test data, ranked by number of submissions.

CityAvg User Radon LevelSubmissions
Tulsa 8.14 pCi/L 7
Oklahoma City 7.00 pCi/L 1
Edmond 5.00 pCi/L 1

Oklahoma Counties by EPA Radon Zone

All 77 Oklahoma counties with their EPA radon zone classification and user-submitted average radon levels.

Zone 2 — Moderate Risk
Predicted avg. indoor levels 2–4 pCi/L
Zone 2 9 counties
Adair County Zone 2
Avg:
Beaver County Zone 2
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Cherokee County Zone 2
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Cimarron County Zone 2
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Delaware County Zone 2
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Ellis County Zone 2
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Mayes County Zone 2
Avg: 7.0 pCi/L
Sequoyah County Zone 2
Avg:
Texas County Zone 2
Avg:
Zone 3 — Low Risk
Predicted avg. indoor levels < 2 pCi/L
Zone 3 68 counties
Alfalfa County Zone 3
Avg:
Atoka County Zone 3
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Beckham County Zone 3
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Blaine County Zone 3
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Bryan County Zone 3
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Caddo County Zone 3
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Canadian County Zone 3
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Carter County Zone 3
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Choctaw County Zone 3
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Cleveland County Zone 3
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Coal County Zone 3
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Comanche County Zone 3
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Cotton County Zone 3
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Craig County Zone 3
Avg: 3.0 pCi/L
Creek County Zone 3
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Custer County Zone 3
Avg: 4.0 pCi/L
Dewey County Zone 3
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Garfield County Zone 3
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Garvin County Zone 3
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Grady County Zone 3
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Grant County Zone 3
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Greer County Zone 3
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Harmon County Zone 3
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Harper County Zone 3
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Haskell County Zone 3
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Hughes County Zone 3
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Jackson County Zone 3
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Jefferson County Zone 3
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Johnston County Zone 3
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Kay County Zone 3
Avg: 4.0 pCi/L
Kingfisher County Zone 3
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Kiowa County Zone 3
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Latimer County Zone 3
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Le Flore County Zone 3
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Lincoln County Zone 3
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Logan County Zone 3
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Love County Zone 3
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Major County Zone 3
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Marshall County Zone 3
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McClain County Zone 3
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McCurtain County Zone 3
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McIntosh County Zone 3
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Murray County Zone 3
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Muskogee County Zone 3
Avg: 5.0 pCi/L
Noble County Zone 3
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Nowata County Zone 3
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Okfuskee County Zone 3
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Oklahoma County Zone 3
Avg: 6.0 pCi/L
Okmulgee County Zone 3
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Osage County Zone 3
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Ottawa County Zone 3
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Pawnee County Zone 3
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Payne County Zone 3
Avg: 4.0 pCi/L
Pittsburg County Zone 3
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Pontotoc County Zone 3
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Pottawatomie County Zone 3
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Pushmataha County Zone 3
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Roger Mills County Zone 3
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Rogers County Zone 3
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Seminole County Zone 3
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Stephens County Zone 3
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Tillman County Zone 3
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Tulsa County Zone 3
Avg: 8.1 pCi/L
Wagoner County Zone 3
Avg:
Washington County Zone 3
Avg: 11.0 pCi/L
Washita County Zone 3
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Woods County Zone 3
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Woodward County Zone 3
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Oklahoma Cities & Towns

Browse radon data for individual cities across Oklahoma. Each city page includes user-submitted radon levels, local contractors, and mitigation resources.

Ada Adair Afton Agra Alex Aline Allen Altus Altus Afb Alva Amber Ames Amorita Anadarko Antlers Apache Arapaho Arcadia Ardmore Arkoma Arnett Asher Atoka Atwood Balko Barnsdall Bartlesville Beaver Beggs Bennington Bessie Bethany Bethel Big Cabin Billings Binger Bison Bixby Blackwell Blair Blanchard Blanco Blocker Bluejacket Boise City Bokchito Bokoshe Boley Boswell Boynton Bradley Braggs Braman Bristow Broken Arrow Broken Bow Buffalo Bunch Burbank Burlington Burneyville Butler Byars Cache Caddo Calera Calumet Calvin Camargo Cameron Canadian Caney Canton Canute Carmen Carnegie Carney Carrier Carter Cartwright Cashion Castle Catoosa Cement Centrahoma Chandler Chattanooga Checotah Chelsea Cherokee Chester Cheyenne Chickasha Choctaw Chouteau Claremore Clayton Cleo Springs Cleveland Clinton Coalgate Colbert Colcord Coleman Collinsville Colony Comanche Commerce Cookson Copan Cordell Corn Council Hill Covington Coweta Coyle Crawford Crescent Cushing Custer City Cyril Dacoma Daisy Davidson Davis Deer Creek Delaware Depew Devol Dewey Dill City Douglas Dover Drummond Drumright Duke Duncan Durant Durham Dustin Eagletown Earlsboro Edmond El Reno Eldorado Elgin Elk City Elmer Elmore City Enid Erick Eucha Eufaula Fairfax Fairland Fairmont Fairview Fargo Faxon Fay Felt Finley Fitzhugh Fletcher Forgan Fort Cobb Fort Gibson Fort Sill Fort Supply Fort Towson Foss Foster Frederick Freedom Gage Gans Garber Garvin Gate Geary Geronimo Glencoe Glenpool Goltry Goodwell Gore Gotebo Gould Gracemont Graham Grandfield Granite Grant Greenfield Grove Guthrie Guymon Hammon Hanna Hardesty Harrah Hartshorne Haskell Hastings Haworth Headrick Healdton Heavener Helena Hendrix Hennepin Hennessey Henryetta Hinton Hitchcock Hobart Hodgen Holdenville Hollis Hollister Hominy Hooker Howe Hugo Hulbert Hunter Hydro Idabel Indiahoma Indianola Inola Isabella Jay Jenks Jennings Jet Jones Kansas Kaw City Kellyville Kenefic Kenton Keota Keyes Kiamichi Christian Mission Kiefer Kingfisher Kingston Kinta Kiowa Konawa Kremlin Lahoma Lamar Lamont Lane Laverne Lawton Lebanon Leedey Lenapah Leon Lexington Lindsay Loco Locust Grove Lone Grove Lone Wolf Longdale Lookeba Loveland Loyal Lucien Luther Macomb Madill Manchester Mangum Mannford Mannsville Maramec Marietta Marland Marlow Marshall Maud May Maysville Mcalester Mccurtain Mcloud Mead Medford Meeker Meno Meridian Miami Milburn Mill Creek Minco Mooreland Morris Morrison Mounds Mountain Park Mountain View Moyers Muldrow Mulhall Muse Muskogee Mustang Mutual Nardin Nash Nashoba Newalla Newcastle Newkirk Ninnekah Noble Norman Nowata Oaks Oakwood Ochelata Okarche Okeene Okemah Oklahoma City Okmulgee Oktaha Olustee Omega Oologah Orlando Osage Oscar Overbrook Owasso Paden Paoli Park Hill Pauls Valley Pawhuska Pawnee Peggs Perkins Perry Picher Piedmont Pittsburg Pocasset Pocola Ponca City Pond Creek Porter Porum Poteau Prague Proctor Prue Pryor Purcell Putnam Quapaw Quinton Ralston Ramona Randlett Ratliff City Rattan Red Oak Red Rock Reydon Ringling Ringold Ringwood Ripley Rocky Roff Roland Roosevelt Rose Rosston Rufe Rush Springs Ryan S Coffeyville Salina Sallisaw Sand Springs Sapulpa Sasakwa Sawyer Sayre Seiling Seminole Sentinel Shady Point Sharon Shattuck Shawnee Shidler Skiatook Smithville Snow Snyder Soper Southard Sparks Spavinaw Spencer Spencerville Sperry Spiro Springer Stidham Stigler Stillwater Stilwell Stonewall Strang Stratford Stringtown Stroud Stuart Sulphur Sweetwater Tahlequah Talala Talihina Taloga Tecumseh Temple Terlton Terral Texhoma Texola Thackerville Thomas Tipton Tishomingo Tonkawa Tryon Tulsa Tupelo Turpin Tuskahoma Tussy Tuttle Twin Oaks Tyrone Union City Valliant Verden Vian Vici Vinita Vinson Wagoner Wakita Walters Wanette Wann Wapanucka Wardville Warner Washington Washita Watonga Watson Watts Waukomis Waurika Wayne Waynoka Weatherford Webbers Falls Welch Weleetka Welling Wellston Westville Wetumka Wewoka Whitefield Whitesboro Wilburton Willow Wilson Wister Woodward Wright City Wyandotte Wynnewood Wynona Yale Yukon

Frequently Asked Questions About Radon in Oklahoma

What radon level is considered "high"?
The EPA action level is 4.0 pCi/L — many homeowners also choose to fix levels between 2.0 and 4.0 pCi/L. Any home with levels at or above 4.0 pCi/L should be mitigated.
How much does radon mitigation cost in Oklahoma?
Radon mitigation typically costs between $800 and $2,500, depending on foundation type and radon severity. A standard sub-slab depressurization system usually falls in the $1,000–$1,500 range.
Does mitigation actually work?
Yes — properly installed systems typically reduce radon levels by up to 99%. A post-mitigation test confirms the system is working correctly, and many homeowners re-test periodically.
Should I test again after mitigation?
Yes. A post-mitigation test is the proof your system is working. The EPA recommends testing within 30 days of installation and retesting every two years.
What EPA Radon Zone is my Oklahoma county in?
Oklahoma counties are classified into three EPA Radon Zones. Zone 1 (highest risk, >4 pCi/L) indicates the most concern. Zone 2 (moderate, 2–4 pCi/L) and Zone 3 (lowest, <2 pCi/L) round out the classification. Use the county directory above to find your specific county's zone and data.

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