Who has jurisdiction over the Great Lakes?

443 (1851) (noting that the Great Lakes are “high seas” for purposes of Federal admiralty and maritime jurisdiction, and holding that the admiralty and maritime jurisdiction granted to the Federal government by the Constitution extends to all public navigable lakes and rivers where interstate or international commerce ...



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Since the State owns up to the high-water line, it holds these properties as a public trust, giving the general public the right to use everything below that high point.

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Four of the Great Lakes—Erie, Huron, Ontario and Superior—are split between the U.S. and Canada. (Lake Michigan is entirely in the U.S.) Until 2017, American boaters did indeed need to be concerned about venturing into foreign waters and getting into trouble with customs authorities.

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3. Who Owns Lake Superior? Lake Superior is shared by Canada and the United States of America. It has shorelines in the Canadian province of Ontario (Superior Country and Algoma Country), and the American states of Minnesota, Wisconsin, and Michigan.

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6. Lake Michigan is the only Great Lake that is entirely within U.S. territory. The Great Lakes touch 8 states – but Michigan is the only state that touches four lakes, with borders on Superior, Michigan, Huron and Erie.

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Michigan has the longest shoreline of the United States, bordering roughly 3,288 miles (5,292 km) of lakes, followed by Wisconsin (820 miles (1,320 km)), New York (473 miles (761 km)), and Ohio (312 miles (502 km)).

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Sea lampreys are the Great Lakes' biggest predators. They attach to valuable fish and feed on their victims blood and body fluids.

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The bottomlands of the Great Lakes are held in trust by the State of Michigan for use and enjoyment by its citizens.

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Lake Superior is the Cleanest and Clearest Great Lake Because of its somewhat isolated location and long cold winters, not much farming is done along Superior's shores. This means lower amounts of nutrients, sediments, and organic material are floating around the lake.

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The water from the Great Lakes is not being exported wholesale to Asia or the Chinese.

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The lake is located at the border between the United States and Canada, and is shared by the American states of Minnesota, Wisconsin and Michigan and the Canadian province of Ontario.

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Threats to the Great Lakes' ecosystems, include invasive species, climate change, pollution, and habitat destruction. Climate change affects water temperatures, weather patterns, and lake levels.

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Water Withdrawals Threaten the Great Lakes Predicted lower Great Lakes water levels due to climate change and increased water use are looming threats to the Great Lakes. While the Great Lakes are large, they are very fragile. Less than 1% of Great Lakes water is renewed annually through rainfall and snowmelt.

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