waterbycounty

Michigan Water Quality

Drinking water data for all 83 counties.

Avg Water Score

99.8

State Grade

A

Counties with Data

83

of 83 total

All Michigan Counties

CountyWater Score
Alcona County100.0
Alpena County100.0
Arenac County100.0
Bay County100.0
Charlevoix County100.0
Cheboygan County100.0
Chippewa County100.0
Clare County100.0
Crawford County100.0
Dickinson County100.0
Eaton County100.0
Gogebic County100.0
Grand Traverse County100.0
Gratiot County100.0
Houghton County100.0
Huron County100.0
Ingham County100.0
Iron County100.0
Kalamazoo County100.0
Kalkaska County100.0
Kent County100.0
Lake County100.0
Leelanau County100.0
Luce County100.0
Macomb County100.0
Manistee County100.0
Mason County100.0
Missaukee County100.0
Monroe County100.0
Montcalm County100.0
Montmorency County100.0
Muskegon County100.0
Oakland County100.0
Oceana County100.0
Ontonagon County100.0
Osceola County100.0
Oscoda County100.0
Otsego County100.0
Ottawa County100.0
Presque Isle County100.0
Roscommon County100.0
Saginaw County100.0
Sanilac County100.0
Schoolcraft County100.0
St. Clair County100.0
St. Joseph County100.0
Tuscola County100.0
Washtenaw County100.0
Wayne County100.0
Wexford County100.0
Alger County99.9
Allegan County99.9
Antrim County99.9
Emmet County99.9
Ionia County99.9
Isabella County99.9
Jackson County99.9
Marquette County99.9
Midland County99.9
Newaygo County99.9
Berrien County99.8
Branch County99.8
Calhoun County99.8
Genesee County99.8
Iosco County99.8
Livingston County99.8
Gladwin County99.7
Hillsdale County99.7
Mecosta County99.7
Ogemaw County99.7
Van Buren County99.7
Cass County99.6
Lapeer County99.6
Lenawee County99.6
Menominee County99.6
Clinton County99.5
Delta County99.5
Shiawassee County99.5
Mackinac County99.4
Benzie County99.1
Barry County99.0
Baraga County98.9
Keweenaw County97.2

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Data Source

Water quality data sourced from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

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