Michigan County Water Quality Reports

Alcona County, MI: 8 Violations — 64/100 (2026)

2026 report: Alcona County, MI scores 64/100 (Grade C). 6 ZIP codes analyzed. 8 EPA violations found. Free report with contaminant data and filter picks.

Alger County, MI: 1 Health Violation — 65/100 (2026)

2026 report: Alger County, MI scores 65/100 (Grade C). 11 ZIP codes analyzed. 10 EPA violations found. Free report with contaminant data and filter picks.

Allegan County, MI: 5 Health Violations — 86/100 (2026)

2026 report: Allegan County, MI scores 86/100 (Grade A). 18 ZIP codes analyzed. 26 EPA violations found. Free report with contaminant data and filter pi...

Alpena County, MI: 2 Health Violations — 61/100 (2026)

2026 report: Alpena County, MI scores 61/100 (Grade C). 4 ZIP codes analyzed. 7 EPA violations found. Free report with contaminant data and filter picks.

Antrim County, MI: 2 Health Violations — 67/100 (2026)

2026 report: Antrim County, MI scores 67/100 (Grade C). 11 ZIP codes analyzed. 12 EPA violations found. Free report with contaminant data and filter picks.

Arenac County, MI: 1 Health Violation — 76/100 (2026)

2026 report: Arenac County, MI scores 76/100 (Grade B). 7 ZIP codes analyzed. 17 EPA violations found. Free report with contaminant data and filter picks.

Baraga County, MI: 2 Health Violations — 58/100 (2026)

2026 report: Baraga County, MI scores 58/100 (Grade C). 8 ZIP codes analyzed. 3 EPA violations found. Free report with contaminant data and filter picks.

Barry County, MI: 11 Health Violations — 70/100 (2026)

2026 report: Barry County, MI scores 70/100 (Grade B). 9 ZIP codes analyzed. 43 EPA violations found. Free report with contaminant data and filter picks.

Bay County, MI: 4 Health Violations — 77/100 (2026)

2026 report: Bay County, MI scores 77/100 (Grade B). 11 ZIP codes analyzed. 8 EPA violations found. Free report with contaminant data and filter picks.

Benzie County, MI: 3 Health Violations — 85/100 (2026)

2026 report: Benzie County, MI scores 85/100 (Grade A). 8 ZIP codes analyzed. 21 EPA violations found. Free report with contaminant data and filter picks.

Berrien County, MI: Lead Above EPA Limits — 80/100 (2026)

2026 report: Berrien County, MI scores 80/100 (Grade B). 28 ZIP codes analyzed. 77 EPA violations found. Lead above EPA limits. Free report with contami...

Branch County, MI: 1 Health Violation — 62/100 (2026)

2026 report: Branch County, MI scores 62/100 (Grade C). 5 ZIP codes analyzed. 16 EPA violations found. Free report with contaminant data and filter picks.

Calhoun County, MI: 39 Health Violations — 49/100 (2026)

2026 report: Calhoun County, MI scores 49/100 (Grade D). 17 ZIP codes analyzed. 72 EPA violations found. Free report with contaminant data and filter pi...

Cass County, MI: Lead Above EPA Limits — 57/100 (2026)

2026 report: Cass County, MI scores 57/100 (Grade C). 7 ZIP codes analyzed. 32 EPA violations found. Lead above EPA limits. Free report with contaminant...

Charlevoix County, MI: Lead Above EPA Limits — 69/100 (2026)

2026 report: Charlevoix County, MI scores 69/100 (Grade C). 5 ZIP codes analyzed. 5 EPA violations found. Lead above EPA limits. Free report with contam...

Cheboygan County, MI: 9 Violations — 73/100 (2026)

2026 report: Cheboygan County, MI scores 73/100 (Grade B). 8 ZIP codes analyzed. 9 EPA violations found. Free report with contaminant data and filter pi...

Chippewa County, MI: 11 Violations — 76/100 (2026)

2026 report: Chippewa County, MI scores 76/100 (Grade B). 20 ZIP codes analyzed. 11 EPA violations found. Free report with contaminant data and filter p...

Clare County, MI: 7 Violations — 85/100 (2026)

2026 report: Clare County, MI scores 85/100 (Grade A). 5 ZIP codes analyzed. 7 EPA violations found. Free report with contaminant data and filter picks.

Clinton County, MI: 4 Health Violations — 71/100 (2026)

2026 report: Clinton County, MI scores 71/100 (Grade B). 10 ZIP codes analyzed. 25 EPA violations found. Free report with contaminant data and filter pi...

Crawford County, MI: 2 Violations — 81/100 (2026)

2026 report: Crawford County, MI scores 81/100 (Grade B). 3 ZIP codes analyzed. 2 EPA violations found. Free report with contaminant data and filter picks.

Delta County, MI: 7 Health Violations — 80/100 (2026)

2026 report: Delta County, MI scores 80/100 (Grade B). 12 ZIP codes analyzed. 21 EPA violations found. Free report with contaminant data and filter picks.

Dickinson County, MI: 4 Violations — 67/100 (2026)

2026 report: Dickinson County, MI scores 67/100 (Grade C). 8 ZIP codes analyzed. 4 EPA violations found. Free report with contaminant data and filter pi...

Eaton County, MI: 1 Health Violation — 76/100 (2026)

2026 report: Eaton County, MI scores 76/100 (Grade B). 12 ZIP codes analyzed. 18 EPA violations found. Free report with contaminant data and filter picks.

Emmet County, MI: Lead Above EPA Limits — 59/100 (2026)

2026 report: Emmet County, MI scores 59/100 (Grade C). 13 ZIP codes analyzed. 12 EPA violations found. Lead above EPA limits. Free report with contamina...

Genesee County, MI: 38 Health Violations — 76/100 (2026)

2026 report: Genesee County, MI scores 76/100 (Grade B). 39 ZIP codes analyzed. 137 EPA violations found. Free report with contaminant data and filter p...

Gladwin County, MI: 1 Health Violation — 81/100 (2026)

2026 report: Gladwin County, MI scores 81/100 (Grade B). 3 ZIP codes analyzed. 16 EPA violations found. Free report with contaminant data and filter picks.

Gogebic County, MI: 1 Health Violation — 80/100 (2026)

2026 report: Gogebic County, MI scores 80/100 (Grade B). 6 ZIP codes analyzed. 9 EPA violations found. Free report with contaminant data and filter picks.

Grand Traverse County, MI: 1 Health Violation — 84/100

2026 report: Grand Traverse County, MI scores 84/100 (Grade B). 12 ZIP codes analyzed. 20 EPA violations found. Free report with contaminant data and fi...

Gratiot County, MI: 18 Violations — 78/100 (2026)

2026 report: Gratiot County, MI scores 78/100 (Grade B). 14 ZIP codes analyzed. 18 EPA violations found. Free report with contaminant data and filter pi...

Hillsdale County, MI: 1 Health Violation — 49/100 (2026)

2026 report: Hillsdale County, MI scores 49/100 (Grade D). 16 ZIP codes analyzed. 11 EPA violations found. Free report with contaminant data and filter ...

Houghton County, MI: 1 Health Violation — 71/100 (2026)

2026 report: Houghton County, MI scores 71/100 (Grade B). 13 ZIP codes analyzed. 49 EPA violations found. Free report with contaminant data and filter p...

Huron County, MI: 11 Violations — 86/100 (2026)

2026 report: Huron County, MI scores 86/100 (Grade A). 13 ZIP codes analyzed. 11 EPA violations found. Free report with contaminant data and filter picks.

Ingham County, MI: 11 Health Violations — 77/100 (2026)

2026 report: Ingham County, MI scores 77/100 (Grade B). 41 ZIP codes analyzed. 141 EPA violations found. Free report with contaminant data and filter pi...

Ionia County, MI: 5 Health Violations — 72/100 (2026)

2026 report: Ionia County, MI scores 72/100 (Grade B). 13 ZIP codes analyzed. 26 EPA violations found. Free report with contaminant data and filter picks.

Iosco County, MI: 3 Health Violations — 80/100 (2026)

2026 report: Iosco County, MI scores 80/100 (Grade B). 11 ZIP codes analyzed. 32 EPA violations found. Free report with contaminant data and filter picks.

Iron County, MI: 18 Violations — 72/100 (2026)

2026 report: Iron County, MI scores 72/100 (Grade B). 9 ZIP codes analyzed. 18 EPA violations found. Free report with contaminant data and filter picks.

Isabella County, MI: 4 Health Violations — 90/100 (2026)

2026 report: Isabella County, MI scores 90/100 (Grade A). 7 ZIP codes analyzed. 16 EPA violations found. Free report with contaminant data and filter pi...

Jackson County, MI: Lead Above EPA Limits — 55/100 (2026)

2026 report: Jackson County, MI scores 55/100 (Grade C). 15 ZIP codes analyzed. 32 EPA violations found. Lead above EPA limits. Free report with contami...

Kalamazoo County, MI: Lead Above EPA Limits — 58/100 (2026)

2026 report: Kalamazoo County, MI scores 58/100 (Grade C). 22 ZIP codes analyzed. 162 EPA violations found. Lead above EPA limits. Free report with cont...

Kalkaska County, MI Water Safety: 73/100 (2026)

2026 report: Kalkaska County, MI scores 73/100 (Grade B). 3 ZIP codes analyzed. No EPA violations. Free report with contaminant data and filter picks.

Kent County, MI: 10 Health Violations — 74/100 (2026)

2026 report: Kent County, MI scores 74/100 (Grade B). 49 ZIP codes analyzed. 79 EPA violations found. Free report with contaminant data and filter picks.

Keweenaw County, MI: 1 Health Violation — 68/100 (2026)

2026 report: Keweenaw County, MI scores 68/100 (Grade C). 4 ZIP codes analyzed. 2 EPA violations found. Free report with contaminant data and filter picks.

Lake County, MI: 1 Violation — 72/100 (2026)

2026 report: Lake County, MI scores 72/100 (Grade B). 5 ZIP codes analyzed. 1 EPA violation found. Free report with contaminant data and filter picks.

Lapeer County, MI: 6 Health Violations — 75/100 (2026)

2026 report: Lapeer County, MI scores 75/100 (Grade B). 10 ZIP codes analyzed. 27 EPA violations found. Free report with contaminant data and filter picks.

Leelanau County, MI: 11 Violations — 68/100 (2026)

2026 report: Leelanau County, MI scores 68/100 (Grade C). 8 ZIP codes analyzed. 11 EPA violations found. Free report with contaminant data and filter pi...

Lenawee County, MI: 15 Health Violations — 53/100 (2026)

2026 report: Lenawee County, MI scores 53/100 (Grade D). 20 ZIP codes analyzed. 45 EPA violations found. Free report with contaminant data and filter pi...

Livingston County, MI: 4 Health Violations — 80/100 (2026)

2026 report: Livingston County, MI scores 80/100 (Grade B). 10 ZIP codes analyzed. 36 EPA violations found. Free report with contaminant data and filter...

Luce County, MI: 5 Violations — 73/100 (2026)

2026 report: Luce County, MI scores 73/100 (Grade B). 3 ZIP codes analyzed. 5 EPA violations found. Free report with contaminant data and filter picks.

Mackinac County, MI: 2 Health Violations — 79/100 (2026)

2026 report: Mackinac County, MI scores 79/100 (Grade B). 6 ZIP codes analyzed. 14 EPA violations found. Free report with contaminant data and filter pi...

Macomb County, MI: 12 Health Violations — 87/100 (2026)

2026 report: Macomb County, MI scores 87/100 (Grade A). 40 ZIP codes analyzed. 73 EPA violations found. Free report with contaminant data and filter picks.

Manistee County, MI: 11 Violations — 78/100 (2026)

2026 report: Manistee County, MI scores 78/100 (Grade B). 10 ZIP codes analyzed. 11 EPA violations found. Free report with contaminant data and filter p...

Marquette County, MI: Lead Above EPA Limits — 68/100 (2026)

2026 report: Marquette County, MI scores 68/100 (Grade C). 13 ZIP codes analyzed. 28 EPA violations found. Lead above EPA limits. Free report with conta...

Mason County, MI: 3 Violations — 77/100 (2026)

2026 report: Mason County, MI scores 77/100 (Grade B). 6 ZIP codes analyzed. 3 EPA violations found. Free report with contaminant data and filter picks.

Mecosta County, MI: 2 Health Violations — 75/100 (2026)

2026 report: Mecosta County, MI scores 75/100 (Grade B). 9 ZIP codes analyzed. 5 EPA violations found. Free report with contaminant data and filter picks.

Menominee County, MI: Lead Above EPA Limits — 60/100 (2026)

2026 report: Menominee County, MI scores 60/100 (Grade C). 12 ZIP codes analyzed. 35 EPA violations found. Lead above EPA limits. Free report with conta...

Midland County, MI: 2 Health Violations — 89/100 (2026)

2026 report: Midland County, MI scores 89/100 (Grade A). 11 ZIP codes analyzed. 7 EPA violations found. Free report with contaminant data and filter picks.

Missaukee County, MI: 6 Violations — 70/100 (2026)

2026 report: Missaukee County, MI scores 70/100 (Grade B). 4 ZIP codes analyzed. 6 EPA violations found. Free report with contaminant data and filter pi...

Monroe County, MI: 20 Violations — 63/100 (2026)

2026 report: Monroe County, MI scores 63/100 (Grade C). 18 ZIP codes analyzed. 20 EPA violations found. Free report with contaminant data and filter picks.

Montcalm County, MI: 22 Violations — 63/100 (2026)

2026 report: Montcalm County, MI scores 63/100 (Grade C). 26 ZIP codes analyzed. 22 EPA violations found. Free report with contaminant data and filter p...

Montmorency County, MI: 11 Violations — 64/100 (2026)

2026 report: Montmorency County, MI scores 64/100 (Grade C). 4 ZIP codes analyzed. 11 EPA violations found. Free report with contaminant data and filter...

Muskegon County, MI: 1 Health Violation — 87/100 (2026)

2026 report: Muskegon County, MI scores 87/100 (Grade A). 15 ZIP codes analyzed. 10 EPA violations found. Free report with contaminant data and filter p...

Newaygo County, MI: 2 Health Violations — 79/100 (2026)

2026 report: Newaygo County, MI scores 79/100 (Grade B). 9 ZIP codes analyzed. 15 EPA violations found. Free report with contaminant data and filter picks.

Oakland County, MI: Lead Above EPA Limits — 77/100 (2026)

2026 report: Oakland County, MI scores 77/100 (Grade B). 87 ZIP codes analyzed. 195 EPA violations found. Lead above EPA limits. Free report with contam...

Oceana County, MI: 1 Health Violation — 85/100 (2026)

2026 report: Oceana County, MI scores 85/100 (Grade A). 6 ZIP codes analyzed. 13 EPA violations found. Free report with contaminant data and filter picks.

Ogemaw County, MI: 1 Health Violation — 82/100 (2026)

2026 report: Ogemaw County, MI scores 82/100 (Grade B). 4 ZIP codes analyzed. 8 EPA violations found. Free report with contaminant data and filter picks.

Ontonagon County, MI: 12 Violations — 76/100 (2026)

2026 report: Ontonagon County, MI scores 76/100 (Grade B). 10 ZIP codes analyzed. 12 EPA violations found. Free report with contaminant data and filter ...

Osceola County, MI: 1 Health Violation — 85/100 (2026)

2026 report: Osceola County, MI scores 85/100 (Grade A). 7 ZIP codes analyzed. 20 EPA violations found. Free report with contaminant data and filter picks.

Oscoda County, MI: 5 Violations — 80/100 (2026)

2026 report: Oscoda County, MI scores 80/100 (Grade B). 6 ZIP codes analyzed. 5 EPA violations found. Free report with contaminant data and filter picks.

Otsego County, MI: 4 Violations — 66/100 (2026)

2026 report: Otsego County, MI scores 66/100 (Grade C). 6 ZIP codes analyzed. 4 EPA violations found. Free report with contaminant data and filter picks.

Ottawa County, MI: 1 Health Violation — 92/100 (2026)

2026 report: Ottawa County, MI scores 92/100 (Grade A). 17 ZIP codes analyzed. 22 EPA violations found. Free report with contaminant data and filter picks.

Presque Isle County, MI: 2 Violations — 69/100 (2026)

2026 report: Presque Isle County, MI scores 69/100 (Grade C). 7 ZIP codes analyzed. 2 EPA violations found. Free report with contaminant data and filter...

Ransom County, MI: 5 Violations — 78/100 (2026)

2026 report: Ransom County, MI scores 78/100 (Grade B). 1 ZIP code analyzed. 5 EPA violations found. Free report with contaminant data and filter picks.

Roscommon County, MI: 14 Violations — 82/100 (2026)

2026 report: Roscommon County, MI scores 82/100 (Grade B). 6 ZIP codes analyzed. 14 EPA violations found. Free report with contaminant data and filter p...

Saginaw County, MI: 2 Health Violations — 83/100 (2026)

2026 report: Saginaw County, MI scores 83/100 (Grade B). 26 ZIP codes analyzed. 52 EPA violations found. Free report with contaminant data and filter pi...

Sanilac County, MI: 1 Health Violation — 73/100 (2026)

2026 report: Sanilac County, MI scores 73/100 (Grade B). 17 ZIP codes analyzed. 28 EPA violations found. Free report with contaminant data and filter pi...

Schoolcraft County, MI: 3 Violations — 87/100 (2026)

2026 report: Schoolcraft County, MI scores 87/100 (Grade A). 4 ZIP codes analyzed. 3 EPA violations found. Free report with contaminant data and filter ...

Shiawassee County, MI: 7 Health Violations — 65/100 (2026)

2026 report: Shiawassee County, MI scores 65/100 (Grade C). 9 ZIP codes analyzed. 15 EPA violations found. Free report with contaminant data and filter ...

St. Clair County, MI: 3 Health Violations — 78/100 (2026)

2026 report: St. Clair County, MI scores 78/100 (Grade B). 19 ZIP codes analyzed. 24 EPA violations found. Free report with contaminant data and filter ...

St. Joseph County, MI: 1 Health Violation — 59/100 (2026)

2026 report: St. Joseph County, MI scores 59/100 (Grade C). 10 ZIP codes analyzed. 25 EPA violations found. Free report with contaminant data and filter...

Tuscola County, MI: 25 Violations — 83/100 (2026)

2026 report: Tuscola County, MI scores 83/100 (Grade B). 16 ZIP codes analyzed. 25 EPA violations found. Free report with contaminant data and filter pi...

Van Buren County, MI: 1 Health Violation — 79/100 (2026)

2026 report: Van Buren County, MI scores 79/100 (Grade B). 14 ZIP codes analyzed. 33 EPA violations found. Free report with contaminant data and filter ...

Washtenaw County, MI: 7 Health Violations — 60/100 (2026)

2026 report: Washtenaw County, MI scores 60/100 (Grade C). 21 ZIP codes analyzed. 84 EPA violations found. Free report with contaminant data and filter ...

Wayne County, MI: Lead Above EPA Limits — 79/100 (2026)

2026 report: Wayne County, MI scores 79/100 (Grade B). 94 ZIP codes analyzed. 386 EPA violations found. Lead above EPA limits. Free report with contamin...

Wexford County, MI: 4 Violations — 89/100 (2026)

2026 report: Wexford County, MI scores 89/100 (Grade A). 5 ZIP codes analyzed. 4 EPA violations found. Free report with contaminant data and filter picks.