Ottawa River Watershed (Toledo area) and River Raisin Watershed
The Ottawa River watershed is located in northwestern Ohio along the Michigan-Ohio border. The River Raisin is a river in Michigan, a small portion of which drains in Ohio immediately west of the Ottawa River. Together the watersheds drain a total of 173 square miles in Ohio and flow through two counties. Major municipalities partially or fully in the watershed include Toledo, Sylvania, Berkey, Lyons and Metamora.
The western portion of the watershed is primarily cultivated crop land. The eastern portion of the watershed is almost entirely urban development. A portion of the unique Oak Openings region is located near the south-central edge of the watershed.
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