Currently the most notorious dead zone is a 22,126 square kilometre (8,543 mi²) region in the Gulf of Mexico, where the Mississippi River dumps high-nutrient runoff from its vast drainage basin, which includes the heart of U.S. agribusiness, the Midwest. The drainage of these nutrients are affecting important shrimp fishing grounds. This is equivalent to a dead zone the size of New Jersey. This estimate does not include nor take into account the Deep water Horizon oil spill from April to July 2010.
A dead zone off the coast of Texas where the Brazos River empties into the Gulf was also discovered in July 2007.
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