EPA radon zones
Michigan radon map: every county's zone
9 of Michigan's 83 counties are EPA radon zone 1 (predicted average above 4 pCi/L), 32 are zone 2 and 42 are zone 3. High readings occur in every zone, so EPA recommends testing every home.
Alcona CountyZone 2
Alger CountyZone 2
Allegan CountyZone 3
Alpena CountyZone 2
Antrim CountyZone 2
Arenac CountyZone 3
Baraga CountyZone 2
Barry CountyZone 2
Bay CountyZone 3
Benzie CountyZone 3
Berrien CountyZone 3
Branch CountyZone 1
Calhoun CountyZone 1
Cass CountyZone 1
Charlevoix CountyZone 2
Cheboygan CountyZone 3
Chippewa CountyZone 3
Clare CountyZone 3
Clinton CountyZone 2
Crawford CountyZone 3
Delta CountyZone 3
Dickinson CountyZone 2
Eaton CountyZone 2
Emmet CountyZone 2
Genesee CountyZone 2
Gladwin CountyZone 3
Gogebic CountyZone 2
Grand Traverse CountyZone 3
Gratiot CountyZone 3
Hillsdale CountyZone 1
Houghton CountyZone 2
Huron CountyZone 3
Ingham CountyZone 2
Ionia CountyZone 2
Iosco CountyZone 3
Iron CountyZone 2
Isabella CountyZone 3
Jackson CountyZone 1
Kalamazoo CountyZone 1
Kalkaska CountyZone 3
Kent CountyZone 2
Keweenaw CountyZone 2
Lake CountyZone 3
Lapeer CountyZone 2
Leelanau CountyZone 2
Lenawee CountyZone 1
Livingston CountyZone 2
Luce CountyZone 3
Mackinac CountyZone 3
Macomb CountyZone 3
Manistee CountyZone 3
Marquette CountyZone 2
Mason CountyZone 3
Mecosta CountyZone 3
Menominee CountyZone 2
Midland CountyZone 3
Missaukee CountyZone 3
Monroe CountyZone 2
Montcalm CountyZone 2
Montmorency CountyZone 2
Muskegon CountyZone 3
Newaygo CountyZone 3
Oakland CountyZone 2
Oceana CountyZone 3
Ogemaw CountyZone 3
Ontonagon CountyZone 3
Osceola CountyZone 3
Oscoda CountyZone 3
Otsego CountyZone 2
Ottawa CountyZone 3
Presque Isle CountyZone 2
Roscommon CountyZone 3
Saginaw CountyZone 3
Sanilac CountyZone 2
Schoolcraft CountyZone 3
Shiawassee CountyZone 2
St. Clair CountyZone 3
St. Joseph CountyZone 1
Tuscola CountyZone 3
Van Buren CountyZone 3
Washtenaw CountyZone 1
Wayne CountyZone 3
Wexford CountyZone 3
How much does radon mitigation cost?
Most single-family systems cost $800 to $2,500 installed, depending on foundation type and how many suction points are needed. A follow-up test confirms the system works.
What do the zones mean?
EPA radon zones describe counties, not houses. Zone 1 counties have a predicted average indoor level above 4 picocuries per liter (pCi/L), Zone 2 between 2 and 4, Zone 3 below 2. Homes with high levels are found in every zone, which is why EPA recommends that every home be tested, and fixed at 4 pCi/L or above.
Michigan cities: water and radon
Source: EPA Map of Radon Zones.