Michigan Drinking Water Violations

10,776Water Systems
91,733Total Violations
2,186Health-Based

Michigan has 10,776 active public water systems regulated under the EPA's Safe Drinking Water Act. Across these systems, there have been 2,186 health-based violations out of 91,733 total violations recorded. Currently, 68 water systems have unresolved health-based violations.

The most frequently cited health-based contaminants in Michigan are Unknown, Unknown, and Unknown. Health-based violations mean a water system exceeded an EPA maximum contaminant level (MCL) or failed required treatment standards.

Browse the counties below to find specific water systems, or search by address or ZIP code to find your water provider.

Counties

CountyWater SystemsTotal ViolationsHealth-Based
Lenawee County 18 265 71
Genesee County 17 426 67
Wayne County 36 404 32
Delta County 5 120 22
Berrien County 13 539 20
Washtenaw County 21 125 20
Calhoun County 6 60 18
Shiawassee County 7 76 13
Oakland County 34 188 12
Macomb County 13 172 12
Bay County 6 42 11
Baraga County 2 31 11
Lapeer County 8 111 10
Cass County 6 78 8
Marquette County 9 143 7
Kent County 14 56 7
Jackson County 14 170 6
Keweenaw County 5 144 6
Hillsdale County 6 38 6
Wexford County 4 60 5
Mackinac County 2 22 5
Monroe County 9 196 4
Van Buren County 11 126 4
Clinton County 6 87 4
Allegan County 8 48 4
Kalamazoo County 7 32 4
Ottawa County 15 32 4
Osceola County 4 27 4
Huron County 3 16 4
Isabella County 1 12 4
Mecosta County 1 6 4
Ionia County 9 202 3
Chippewa County 4 33 3
St. Joseph County 8 192 2
St. Clair County 7 84 2
Ingham County 7 76 2
Muskegon County 10 70 2
Alger County 4 69 2
Ogemaw County 2 32 2
Manistee County 4 179 1
Houghton County 10 127 1
Gladwin County 2 77 1
Newaygo County 6 42 1
Grand Traverse County 2 33 1
Livingston County 4 16 1
Oceana County 3 15 1
Oscoda County 3 3 1
Missaukee County 2 181 0
Barry County 6 166 0
Roscommon County 7 119 0
Montcalm County 10 118 0
Arenac County 3 106 0
Eaton County 8 84 0
Iron County 6 61 0
Ontonagon County 5 59 0
Montmorency County 3 58 0
Gratiot County 6 51 0
Sanilac County 3 39 0
Cheboygan County 5 32 0
Antrim County 4 29 0
Tuscola County 3 29 0
Benzie County 2 22 0
Otsego County 4 20 0
Charlevoix County 4 19 0
Gogebic County 5 19 0
Luce County 1 18 0
Menominee County 4 16 0
Presque Isle County 4 15 0
Saginaw County 3 15 0
Branch County 4 14 0
Leelanau County 4 13 0
Schoolcraft County 3 13 0
Dickinson County 5 12 0
Clare County 2 6 0
Emmet County 2 6 0
Iosco County 2 6 0
Mason County 3 6 0
Alcona County 1 5 0
Lake County 1 4 0
Crawford County 2 3 0
Kalkaska County 1 3 0
Alpena County 1 1 0
Midland County 2 1 0