America's Watershed Initiative
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Mississippi Watershed Map

The Mississippi River Watershed is the fourth largest in the world, covering all or parts of 31 U.S. states and two Canadian provinces. It encompasses 41 percent of the lower 48 states. Take a closer look of the Mississippi and its five major sub-basins here.

Missouri
River Basin
Arkansas
River Basin
Tennessee
River Basin
Ohio
River Basin
Upper Mississippi
River Basin
Lower Mississippi
River Basin
Red
River Basin
green purple orange blue yellow

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