Twelve Midwestern states agreed to reduce by 45 percent nitrate and phosphorus running into the Mississippi River and down to the Gulf of Mexico, where the nutrients contribute to an oxygen-deprived dead zone.
Browse this interactive to see how states are doing to control nitrate and phosphorus runoff, as well as gauge measurements at a number of spots along the Mississippi River.
Unfocused and underfunded, goal of cleaner water falters
MORE TREADING WATER ARTICLES ...
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