Great Lakes Basin

The Great Lakes Basin consists of the Great Lakes and the surrounding lands of the states of Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania, and Wisconsin in the United States, and the province of Ontario in Canada, whose direct surface runoff and watersheds form a large drainage basin that feeds into the lakes.

[1] It hosts seven of Canada's 20 largest census metropolitan areas, namely Toronto, Hamilton, Kitchener–Cambridge–Waterloo, London, St. Catharines–Niagara, Windsor, and Oshawa.

Also, the American cities of Duluth, Milwaukee, Chicago, Gary, Detroit, Toledo, Cleveland, Erie, Buffalo, Rochester, and Syracuse, among others, are located in the basin.

[2] While not a part of the Great Lakes Basin, Quebec's position along the Saint Lawrence Seaway makes it a partner in water resource management with Ontario and the eight US states mentioned above.

There are many nuclear power plants in the Great Lakes Basin, including twenty on the Canadian side.