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Radon Levels, Testing and Mitigation in Kansas

Kansas has 105 counties, with 65 classified as EPA Zone 1 (highest risk). With an average radon level of 8.41 pCi/L, Kansas state testing data reveals significantly elevated risks across multiple counties. Testing is highly recommended.

Kansas is the 15th most expansive state and the 34th most populous. It also happens to be one of the most productive states in the country as far as agriculture is concerned with several high yields of wheat, sorghum and more. It is estimated by the Kansas Department of Public Health that more than 200 lung cancer deaths in the state every year can be linked to indoor radon exposure.

The state has 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.

8.41
Avg. pCi/L
105
Counties
65
Zone 1 Counties

Kansas Radon Map

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

Kansas Metro Areas

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

Joplin Metro
5 cities
Kansas City Metro
5 cities
Topeka Metro
5 cities
Wichita Metro
5 cities

Most Active Radon Markets in Kansas

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

CityAvg User Radon LevelSubmissions
Topeka 6.00 pCi/L 1
Overland Park No submissions 0

Kansas Counties by EPA Radon Zone

All 105 Kansas counties with their EPA radon zone classification and user-submitted average radon levels.

Zone 1 — High Risk
Predicted avg. indoor levels > 4.0 pCi/L
Zone 1 65 counties
Atchison County Zone 1
Avg:
Barton County Zone 1
Avg:
Brown County Zone 1
Avg: 8.5 pCi/L
Cheyenne County Zone 1
Avg:
Clay County Zone 1
Avg:
Cloud County Zone 1
Avg:
Decatur County Zone 1
Avg:
Dickinson County Zone 1
Avg: 16.0 pCi/L
Douglas County Zone 1
Avg:
Ellis County Zone 1
Avg:
Ellsworth County Zone 1
Avg:
Finney County Zone 1
Avg: 10.5 pCi/L
Ford County Zone 1
Avg: 20.0 pCi/L
Geary County Zone 1
Avg: 7.0 pCi/L
Gove County Zone 1
Avg:
Graham County Zone 1
Avg:
Grant County Zone 1
Avg:
Gray County Zone 1
Avg:
Greeley County Zone 1
Avg:
Hamilton County Zone 1
Avg:
Haskell County Zone 1
Avg:
Hodgeman County Zone 1
Avg:
Jackson County Zone 1
Avg:
Jewell County Zone 1
Avg:
Johnson County Zone 1
Avg: 6.3 pCi/L
Kearny County Zone 1
Avg: 6.0 pCi/L
Kingman County Zone 1
Avg:
Kiowa County Zone 1
Avg:
Lane County Zone 1
Avg:
Leavenworth County Zone 1
Avg: 5.0 pCi/L
Lincoln County Zone 1
Avg:
Logan County Zone 1
Avg: 12.0 pCi/L
Marion County Zone 1
Avg:
Marshall County Zone 1
Avg:
McPherson County Zone 1
Avg: 6.0 pCi/L
Meade County Zone 1
Avg:
Mitchell County Zone 1
Avg:
Nemaha County Zone 1
Avg:
Ness County Zone 1
Avg:
Norton County Zone 1
Avg: 13.0 pCi/L
Osborne County Zone 1
Avg:
Ottawa County Zone 1
Avg:
Pawnee County Zone 1
Avg:
Phillips County Zone 1
Avg:
Pottawatomie County Zone 1
Avg: 5.5 pCi/L
Pratt County Zone 1
Avg:
Rawlins County Zone 1
Avg: 5.0 pCi/L
Republic County Zone 1
Avg: 14.0 pCi/L
Rice County Zone 1
Avg:
Riley County Zone 1
Avg:
Rooks County Zone 1
Avg:
Rush County Zone 1
Avg:
Russell County Zone 1
Avg:
Saline County Zone 1
Avg: 7.5 pCi/L
Scott County Zone 1
Avg: 7.0 pCi/L
Sheridan County Zone 1
Avg: 5.0 pCi/L
Sherman County Zone 1
Avg:
Smith County Zone 1
Avg: 9.0 pCi/L
Stanton County Zone 1
Avg:
Thomas County Zone 1
Avg:
Trego County Zone 1
Avg:
Wallace County Zone 1
Avg:
Washington County Zone 1
Avg:
Wichita County Zone 1
Avg:
Wyandotte County Zone 1
Avg:
Zone 2 — Moderate Risk
Predicted avg. indoor levels 2–4 pCi/L
Zone 2 40 counties
Allen County Zone 2
Avg:
Anderson County Zone 2
Avg: 9.5 pCi/L
Barber County Zone 2
Avg:
Bourbon County Zone 2
Avg:
Butler County Zone 2
Avg: 6.5 pCi/L
Chase County Zone 2
Avg:
Chautauqua County Zone 2
Avg:
Cherokee County Zone 2
Avg: 12.5 pCi/L
Clark County Zone 2
Avg:
Coffey County Zone 2
Avg:
Comanche County Zone 2
Avg:
Cowley County Zone 2
Avg: 4.5 pCi/L
Crawford County Zone 2
Avg:
Doniphan County Zone 2
Avg:
Edwards County Zone 2
Avg:
Elk County Zone 2
Avg:
Franklin County Zone 2
Avg: 16.5 pCi/L
Greenwood County Zone 2
Avg: 10.0 pCi/L
Harper County Zone 2
Avg:
Harvey County Zone 2
Avg: 5.0 pCi/L
Jefferson County Zone 2
Avg:
Labette County Zone 2
Avg:
Linn County Zone 2
Avg:
Lyon County Zone 2
Avg: 4.0 pCi/L
Miami County Zone 2
Avg: 8.5 pCi/L
Montgomery County Zone 2
Avg: 9.0 pCi/L
Morris County Zone 2
Avg:
Morton County Zone 2
Avg:
Neosho County Zone 2
Avg:
Osage County Zone 2
Avg:
Reno County Zone 2
Avg:
Sedgwick County Zone 2
Avg: 7.0 pCi/L
Seward County Zone 2
Avg: 6.0 pCi/L
Shawnee County Zone 2
Avg: 6.0 pCi/L
Stafford County Zone 2
Avg:
Stevens County Zone 2
Avg:
Sumner County Zone 2
Avg:
Wabaunsee County Zone 2
Avg:
Wilson County Zone 2
Avg: 4.0 pCi/L
Woodson County Zone 2
Avg:

Kansas Cities & Towns

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

Abbyville Abilene Admire Agenda Agra Albert Alden Alexander Allen Alma Almena Alta Vista Altamont Alton Altoona Americus Andale Andover Anthony Arcadia Argonia Arkansas City Arlington Arma Arnold Ashland Assaria Atchison Athol Atlanta Attica Atwood Auburn Augusta Aurora Axtell Baileyville Baldwin City Barnard Barnes Bartlett Basehor Baxter Springs Bazine Beattie Beeler Belle Plaine Belleville Beloit Belpre Belvue Bendena Benedict Bennington Benton Bern Berryton Beverly Bird City Bison Blue Mound Blue Rapids Bluff City Bogue Bonner Springs Bremen Brewster Bronson Brookville Brownell Bucklin Bucyrus Buffalo Buhler Bunker Hill Burden Burdett Burdick Burlingame Burlington Burns Burr Oak Burrton Bushton Byers Caldwell Cambridge Caney Canton Carbondale Cassoday Cawker City Cedar Cedar Point Cedar Vale Centerville Centralia Chanute Chapman Chase Cheney Cherokee Cherryvale Chetopa Cimarron Circleville Claflin Clay Center Clayton Clearwater Clifton Clyde Coats Coffeyville Colby Coldwater Collyer Colony Columbus Colwich Concordia Conway Springs Copeland Corning Cottonwood Falls Council Grove Courtland Cuba Cummings Cunningham Damar Danville De Soto Deerfield Delia Delphos Denison Dennis Denton Derby Dexter Dighton Dodge City Dorrance Douglass Downs Dresden Durham Dwight Easton Edgerton Edna Edson Effingham El Dorado Elk City Elk Falls Elkhart Ellinwood Ellis Ellsworth Elmdale Elsmore Emmett Emporia Ensign Enterprise Erie Esbon Eskridge Eudora Eureka Everest Fairview Fall River Falun Farlington Florence Fontana Ford Formoso Fort Dodge Fort Leavenworth Fort Riley Fort Scott Fowler Frankfort Franklin Fredonia Freeport Frontenac Fulton Galena Galesburg Galva Garden City Garden Plain Gardner Garfield Garland Garnett Gaylord Gem Geneseo Geuda Springs Girard Glade Glasco Glen Elder Goddard Goff Goodland Gorham Gove Grainfield Grantville Great Bend Greeley Green Greenleaf Greensburg Greenwich Grenola Gridley Grinnell Gypsum Haddam Halstead Hamilton Hanover Hanston Hardtner Harper Hartford Harveyville Havana Haven Havensville Haviland Hays Haysville Hazelton Healy Hepler Herington Herndon Hesston Hiawatha Highland Hill City Hillsboro Hoisington Holcomb Hollenberg Holton Holyrood Home Hope Horton Howard Hoxie Hoyt Hudson Hugoton Humboldt Hunter Hutchinson Independence Ingalls Inman Iola Isabel Iuka Jamestown Jennings Jetmore Jewell Johnson Junction City Kanopolis Kanorado Kansas City Kechi Kendall Kensington Kincaid Kingman Kinsley Kiowa Kirwin Kismet La Crosse La Harpe Lacygne Lake City Lakin Lamont Lancaster Lane Lansing Larned Latham Lawrence Le Roy Leavenworth Leawood Lebanon Lebo Lecompton Lehigh Lenexa Lenora Leon Leonardville Leoti Levant Lewis Liberal Liberty Lincoln Lincolnville Lindsborg Linn Linwood Little River Logan Long Island Longford Longton Lorraine Lost Springs Louisburg Lucas Ludell Luray Lyndon Lyons Macksville Madison Mahaska Maize Manhattan Mankato Manter Maple City Maple Hill Mapleton Marienthal Marion Marquette Marysville Matfield Green Mayetta Mayfield Mc Cracken Mc Cune Mc Donald Mc Louth Mcconnell Afb Mcpherson Meade Medicine Lodge Melvern Meriden Milan Milford Milton Miltonvale Minneapolis Minneola Mission Moline Montezuma Monument Moran Morganville Morland Morrill Morrowville Moscow Mound City Mound Valley Moundridge Mount Hope Mulberry Mullinville Mulvane Munden Murdock Muscotah Narka Nashville Natoma Nekoma Neodesha Neosho Falls Neosho Rapids Ness City Netawaka New Cambria New Century Newton Nickerson Niotaze Norcatur North Newton Norton Nortonville Norwich Oakley Oberlin Offerle Ogallah Ogden Oketo Olathe Olmitz Olpe Olsburg Onaga Oneida Osage City Osawatomie Osborne Oskaloosa Oswego Otis Ottawa Overbrook Overland Park Oxford Ozawkie Palco Palmer Paola Paradise Park Parker Parsons Partridge Pawnee Rock Paxico Peabody Peck Penokee Perry Peru Phillipsburg Piedmont Pierceville Piqua Pittsburg Plains Plainville Pleasanton Plevna Pomona Portis Potwin Powhattan Prairie View Prairie Village Pratt Prescott Pretty Prairie Princeton Protection Quenemo Quinter Ramona Randall Randolph Ransom Rantoul Raymond Reading Redfield Republic Rexford Richfield Richmond Riley Riverton Robinson Rock Rolla Rosalia Rose Hill Rossville Rozel Rush Center Russell Sabetha Saint Francis Saint George Saint John Saint Marys Saint Paul Salina Satanta Savonburg Sawyer Scammon Scandia Scott City Scranton Sedan Sedgwick Selden Seneca Severy Sharon Sharon Springs Shawnee Shawnee Mission Silver Lake Smith Center Soldier Solomon South Haven South Hutchinson Spearville Spivey Spring Hill Stafford Stark Sterling Stilwell Stockton Strong City Sublette Summerfield Sun City Sylvan Grove Sylvia Syracuse Tampa Tecumseh Tescott Thayer Tipton Tonganoxie Topeka Toronto Towanda Treece Tribune Troy Turon Udall Ulysses Uniontown Utica Valley Center Valley Falls Vassar Vermillion Victoria Viola Virgil Wakarusa Wakeeney Wakefield Waldo Waldron Wallace Walnut Walton Wamego Washington Waterville Wathena Waverly Webber Weir Welda Wellington Wellsville Weskan Westmoreland Westphalia Wetmore White City White Cloud Whitewater Whiting Wichita Williamsburg Wilmore Wilsey Wilson Winchester Windom Winfield Winona Woodbine Woodston Wright Yates Center Zenda

Frequently Asked Questions About Radon in Kansas

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 Kansas?
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 Kansas county in?
Kansas 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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