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Radon Levels, Testing and Mitigation in Michigan

Michigan has 82 counties, with 8 classified as EPA Zone 1 (highest risk). With an average radon level of 6.61 pCi/L, Michigan state testing data reveals significantly elevated risks across multiple counties. Testing is highly recommended.

Michigan is the 11th most expansive state in terms of size and the 9th most populous. According to a survey conducted during the 1987-88 winter season it was discovered that approximately 12 percent of the homes in the state (nearly one in eight) have radon levels exceeding 4 pCi/l which is the recommended action level set by EPA. Furthermore, in some counties, as many as 40-45 percent (or more) of the homes were found to have levels well over the 4 pCi/l guideline.

Michigan 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.

6.61
Avg. pCi/L
82
Counties
8
Zone 1 Counties

Michigan Radon Map

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

Michigan Metro Areas

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

Ann Arbor Metro
5 cities
Detroit Metro
5 cities
Flint Metro
5 cities
Grand Rapids Metro
5 cities
Jackson Metro
5 cities
Kalamazoo Metro
5 cities
Lansing Metro
5 cities
Monroe Metro
5 cities
Muskegon Metro
5 cities
Niles Metro
5 cities
Saginaw Metro
5 cities
South Bend Metro
5 cities
Traverse City Metro
5 cities

Most Active Radon Markets in Michigan

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

CityAvg User Radon LevelSubmissions
Novi 5.00 pCi/L 7
Rochester 9.00 pCi/L 5
Battle Creek 6.60 pCi/L 5
White Lake 10.00 pCi/L 4
Ypsilanti 8.50 pCi/L 4
Waterford 7.75 pCi/L 4
Howell 7.50 pCi/L 4
Gaylord 6.00 pCi/L 4
Gladstone 5.25 pCi/L 4
West Bloomfield 5.25 pCi/L 4
Clarkston 5.00 pCi/L 4
Flint 9.00 pCi/L 3
Pinckney 7.33 pCi/L 3
Northville 5.33 pCi/L 3
Milford 4.33 pCi/L 3
Plymouth 4.33 pCi/L 3
Portage 3.33 pCi/L 3
Lake Orion 11.00 pCi/L 2
Oxford 11.00 pCi/L 2
Grand Ledge 7.00 pCi/L 2

Michigan Counties by EPA Radon Zone

All 82 Michigan 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 8 counties
Branch County Zone 1
Avg: 9.0 pCi/L
Calhoun County Zone 1
Avg: 6.6 pCi/L
Cass County Zone 1
Avg:
Hillsdale County Zone 1
Avg:
Jackson County Zone 1
Avg: 8.4 pCi/L
Kalamazoo County Zone 1
Avg: 3.3 pCi/L
Lenawee County Zone 1
Avg: 7.0 pCi/L
Washtenaw County Zone 1
Avg: 6.3 pCi/L
Zone 2 — Moderate Risk
Predicted avg. indoor levels 2–4 pCi/L
Zone 2 32 counties
Alcona County Zone 2
Avg:
Alger County Zone 2
Avg:
Alpena County Zone 2
Avg:
Antrim County Zone 2
Avg: 5.0 pCi/L
Baraga County Zone 2
Avg:
Barry County Zone 2
Avg:
Charlevoix County Zone 2
Avg: 12.5 pCi/L
Clinton County Zone 2
Avg: 20.0 pCi/L
Dickinson County Zone 2
Avg: 5.0 pCi/L
Eaton County Zone 2
Avg: 8.2 pCi/L
Emmet County Zone 2
Avg: 8.0 pCi/L
Genesee County Zone 2
Avg: 6.6 pCi/L
Gogebic County Zone 2
Avg: 10.0 pCi/L
Houghton County Zone 2
Avg: 5.0 pCi/L
Ingham County Zone 2
Avg: 5.8 pCi/L
Ionia County Zone 2
Avg: 4.0 pCi/L
Iron County Zone 2
Avg:
Kent County Zone 2
Avg: 4.0 pCi/L
Keweenaw County Zone 2
Avg:
Lapeer County Zone 2
Avg: 4.0 pCi/L
Leelanau County Zone 2
Avg: 2.0 pCi/L
Livingston County Zone 2
Avg: 7.6 pCi/L
Marquette County Zone 2
Avg: 9.0 pCi/L
Menominee County Zone 2
Avg:
Monroe County Zone 2
Avg: 4.0 pCi/L
Montcalm County Zone 2
Avg:
Montmorency County Zone 2
Avg:
Oakland County Zone 2
Avg: 7.3 pCi/L
Otsego County Zone 2
Avg: 6.0 pCi/L
Presque Isle County Zone 2
Avg:
Sanilac County Zone 2
Avg: 2.0 pCi/L
Shiawassee County Zone 2
Avg:
Zone 3 — Low Risk
Predicted avg. indoor levels < 2 pCi/L
Zone 3 42 counties
Allegan County Zone 3
Avg: 5.0 pCi/L
Arenac County Zone 3
Avg:
Bay County Zone 3
Avg: 2.0 pCi/L
Benzie County Zone 3
Avg:
Berrien County Zone 3
Avg: 4.0 pCi/L
Cheboygan County Zone 3
Avg:
Chippewa County Zone 3
Avg: 4.0 pCi/L
Clare County Zone 3
Avg:
Crawford County Zone 3
Avg:
Delta County Zone 3
Avg: 5.4 pCi/L
Gladwin County Zone 3
Avg: 8.0 pCi/L
Grand Traverse County Zone 3
Avg: 5.3 pCi/L
Gratiot County Zone 3
Avg: 3.0 pCi/L
Huron County Zone 3
Avg:
Iosco County Zone 3
Avg:
Isabella County Zone 3
Avg:
Kalkaska County Zone 3
Avg:
Lake County Zone 3
Avg:
Luce County Zone 3
Avg:
Mackinac County Zone 3
Avg: 2.0 pCi/L
Macomb County Zone 3
Avg: 4.3 pCi/L
Manistee County Zone 3
Avg:
Mason County Zone 3
Avg:
Mecosta County Zone 3
Avg:
Midland County Zone 3
Avg:
Missaukee County Zone 3
Avg:
Muskegon County Zone 3
Avg: 3.0 pCi/L
Newaygo County Zone 3
Avg: 13.0 pCi/L
Oceana County Zone 3
Avg:
Ogemaw County Zone 3
Avg:
Ontonagon County Zone 3
Avg:
Osceola County Zone 3
Avg:
Oscoda County Zone 3
Avg:
Ottawa County Zone 3
Avg: 5.8 pCi/L
Roscommon County Zone 3
Avg:
Saginaw County Zone 3
Avg: 14.7 pCi/L
Schoolcraft County Zone 3
Avg:
St. Clair County Zone 3
Avg:
Tuscola County Zone 3
Avg:
Van Buren County Zone 3
Avg: 4.0 pCi/L
Wayne County Zone 3
Avg: 5.3 pCi/L
Wexford County Zone 3
Avg: 6.0 pCi/L

Michigan Cities & Towns

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

Ada Addison Adrian Afton Akron Alanson Albion Alden Alger Algonac Allegan Allen Allen Park Allendale Allenton Allouez Alma Almont Alpena Alto Ann Arbor Applegate Arcadia Armada Ashley Athens Atlanta Atlantic Mine Attica Au Gres Au Train Auburn Auburn Hills Augusta Avoca Bad Axe Bailey Baldwin Bancroft Bangor Bannister Baraga Barbeau Bark River Baroda Barryton Barton City Bath Battle Creek Bay City Bay Port Bear Lake Beaver Island Beaverton Belding Bellaire Belleville Bellevue Belmont Bentley Benton Harbor Benzonia Bergland Berkley Berrien Center Berrien Springs Bessemer Beulah Big Rapids Birch Run Birmingham Bitely Black River Blanchard Blissfield Bloomfield Hills Bloomingdale Boon Boyne City Boyne Falls Branch Brant Breckenridge Brethren Bridgeport Bridgman Brighton Brimley Britton Bronson Brooklyn Brown City Bruce Crossing Brutus Buchanan Buckley Burlington Burr Oak Burt Burton Byron Byron Center Cadillac Caledonia Calumet Camden Canton Capac Carleton Carney Caro Carp Lake Carson City Carsonville Casco Caseville Casnovia Cass City Cassopolis Cedar Cedar Springs Cedarville Cement City Center Line Central Lake Centreville Ceresco Champion Channing Charlevoix Charlotte Chase Chassell Chatham Cheboygan Chelsea Chesaning Clare Clarklake Clarkston Clarksville Clawson Clayton Clifford Climax Clinton Clinton Township Clio Coldwater Coleman Coloma Colon Columbiaville Columbus Comins Commerce Township Comstock Park Concord Conklin Constantine Cooks Coopersville Copemish Coral Cornell Corunna Covert Covington Croswell Crystal Crystal Falls Curran Curtis Custer Dafter Daggett Dansville Davisburg Davison De Tour Village Dearborn Dearborn Heights Decatur Decker Deckerville Deerfield Deerton Deford Delton Detroit Dewitt Dexter Dimondale Dodgeville Dorr Dowagiac Dowling Drummond Island Dryden Dundee Durand Eagle East China East Jordan East Lansing East Leroy East Tawas Eastpointe Eaton Rapids Eau Claire Eckerman Ecorse Edmore Edwardsburg Elk Rapids Elkton Ellsworth Elmira Elsie Elwell Emmett Empire Engadine Erie Escanaba Essexville Evart Ewen Fair Haven Fairgrove Fairview Falmouth Farmington Farwell Felch Fennville Fenton Fenwick Ferndale Fife Lake Filion Flat Rock Flint Flushing Fort Gratiot Foster City Fostoria Fountain Fowler Fowlerville Frankenmuth Frankfort Franklin Fraser Frederic Free Soil Freeland Freeport Fremont Fruitport Fulton Gaastra Gagetown Gaines Galesburg Galien Garden Garden City Gaylord Germfask Gladstone Gladwin Glen Arbor Glennie Gobles Goetzville Goodells Goodrich Gould City Gowen Grand Blanc Grand Haven Grand Junction Grand Ledge Grand Rapids Grandville Grant Grass Lake Grawn Grayling Greenbush Greenville Gregory Grosse Ile Grosse Pointe Gulliver Gwinn Hale Hamilton Hamtramck Hancock Hanover Harbor Beach Harbor Springs Harper Woods Harrietta Harrison Harrison Township Harrisville Harsens Island Hart Hartford Hartland Haslett Hastings Hawks Hazel Park Hemlock Henderson Hermansville Herron Hersey Hesperia Hessel Hickory Corners Highland Highland Park Hillman Hillsdale Holland Holly Holt Holton Homer Honor Hope Hopkins Horton Houghton Houghton Lake Howard City Howell Hubbard Lake Hubbardston Hudson Hudsonville Huntington Woods Ida Idlewild Imlay City Indian River Ingalls Inkster Interlochen Ionia Iron Mountain Iron River Irons Ironwood Ishpeming Ithaca Jackson Jasper Jeddo Jenison Jerome Johannesburg Jones Jonesville Kalamazoo Kaleva Kalkaska Kawkawlin Keego Harbor Kent City Kewadin Kincheloe Kinde Kingsford Kingsley Kingston Kinross La Salle Lachine Laingsburg Lake Lake Ann Lake City Lake Leelanau Lake Linden Lake Odessa Lake Orion Lakeside Lakeview Lambertville Lanse Lansing Lapeer Lawrence Lawton Leland Lennon Leonard Leonidas Leroy Leslie Levering Lewiston Lexington Lincoln Lincoln Park Linden Linwood Litchfield Livonia Long Lake Loretto Lowell Ludington Luna Pier Lupton Luther Luzerne Lyons Mackinaw City Macomb Madison Heights Mancelona Manchester Manistee Manistique Manitou Beach Manton Maple City Marcellus Marenisco Marine City Marion Marlette Marne Marquette Marshall Martin Marysville Mason Mass City Mattawan Maybee Mayville Mc Bain Mc Millan Mears Mecosta Melvin Melvindale Memphis Mendon Menominee Merrill Merritt Mesick Metamora Michigamme Michigan Center Middleton Middleville Midland Mikado Milan Milford Millersburg Millington Minden City Mio Mohawk Monroe Montague Montgomery Montrose Moran Morenci Morley Morrice Mount Clemens Mount Morris Mount Pleasant Muir Mulliken Munger Munising Munith Muskegon Nashville National City Naubinway Negaunee New Baltimore New Boston New Buffalo New Era New Haven New Hudson New Lothrop Newaygo Newberry Newport Niles Nisula North Adams North Branch North Street Northport Northville Norway Novi Nunica Oak Park Oakland Oakley Okemos Olivet Omer Onaway Onekama Onondaga Onsted Ontonagon Orleans Ortonville Oscoda Osseo Ossineke Otisville Otsego Ottawa Lake Otter Lake Ovid Owendale Owosso Oxford Palms Palmyra Paradise Paris Parma Paw Paw Peck Pelkie Pellston Pentwater Perrinton Perronville Perry Petersburg Petoskey Pewamo Pickford Pierson Pigeon Pinckney Pinconning Pittsford Plainwell Pleasant Lake Pleasant Ridge Plymouth Pointe Aux Pins Pontiac Port Austin Port Hope Port Huron Port Sanilac Portage Portland Posen Potterville Powers Prescott Presque Isle Prudenville Pullman Quincy Quinnesec Rapid City Rapid River Ravenna Ray Reading Redford Reed City Reese Remus Republic Rhodes Richland Richmond Riga River Rouge Riverdale Riverview Rives Junction Rochester Rock Rockford Rockwood Rodney Rogers City Romeo Romulus Roscommon Rose City Rosebush Roseville Rothbury Royal Oak Rudyard Ruth Saginaw Sagola Saint Charles Saint Clair Saint Clair Shores Saint Helen Saint Ignace Saint Johns Saint Joseph Saint Louis Saline Sand Creek Sand Lake Sandusky Sanford Saranac Saugatuck Sault Sainte Marie Sawyer Schoolcraft Scotts Scottville Sears Sebewaing Seney Shelby Shelbyville Shepherd Sheridan Sherwood Shingleton Sidney Silverwood Six Lakes Skandia Skanee Smiths Creek Snover Sodus Somerset Center South Boardman South Branch South Haven South Lyon South Rockwood Southfield Southgate Spalding Sparta Spring Arbor Spring Lake Springport Spruce Standish Stanton Stanwood Stephenson Sterling Sterling Heights Stevensville Stockbridge Sturgis Sumner Sunfield Suttons Bay Swartz Creek Tawas City Taylor Tecumseh Tekonsha Temperance Thompsonville Three Oaks Three Rivers Tipton Toivola Traverse City Trenary Trenton Trout Creek Troy Trufant Turner Tustin Twin Lake Twining Ubly Union Union City Union Pier Unionville Utica Vandalia Vanderbilt Vassar Vermontville Vestaburg Vicksburg Vulcan Wakefield Waldron Walkerville Wallace Walled Lake Warren Washington Waterford Watersmeet Watervliet Watton Wayland Wayne Webberville Weidman Wells Wellston West Bloomfield West Branch West Olive Westland Westphalia Wetmore Wheeler White Cloud White Lake White Pigeon Whitehall Whitmore Lake Whittemore Williamsburg Williamston Willis Wilson Wixom Wolverine Woodland Wyandotte Wyoming Yale Ypsilanti Zeeland

Frequently Asked Questions About Radon in Michigan

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 Michigan?
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 Michigan county in?
Michigan 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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