DEQ - River Raisin Watershed

Michigan Department of Environmental Quality

Michigan.gov, Official Web Site for the State of Michigan


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River Raisin Watershed

Watershed Summary

The River Raisin, known as "Nummasepee" (River of Sturgeon) by its American Indian inhabitants, drains to the western Lake Erie basin. The watershed covers most of Lenawee County and smaller portions of Monroe, Washtenaw, Jackson and Hillsdale counties in Michigan along with a piece of Fulton County in northeastern Ohio. Cities in the watershed include Saline, Adrian, Tecumseh, Petersburg and Monroe, and villages include Brooklyn, Cement City, Manchester, Blissfield, Britton, Clayton, Clinton, Deerfield, Onsted and Dundee. The northwestern headwaters are on the rim of the Defiance moraine and mark the most easterly advance of ancient glacial ice sheets in southeastern Michigan. The Irish Hills area, a unique local high point in Hillsdale County is the headwaters for the Raisin, Grand, Kalamazoo, St. Joseph and Maumee rivers.

MDEQ Nonpoint Source Links

Watershed Websites

River Raisin Watershed Council

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