Agricultural drainage tile, a system used by farmers to increase crop yields, is a main contributor to excess nutrients in waterways.
Sluggish progress on reducing nutrient runoff into the Bay marks an inconvenient truth, but offers lessons for others seeking to clean their watersheds.
Worsening local effects on health and recreation in states like Minnesota and Wisconsin are spurring action on problems that also cause the Gulf of Mexico’s chronic “dead zone.”
This summer’s “dead zone,” a low-oxygen area where the river empties into the sea, could span 5,827 square miles across the Gulf of Mexico. Louisiana has the power to call for change.
One year away from a federal deadline to reduce nutrient runoff into the Gulf of Mexico by 20%, increases in tile drainage, livestock and fertilizer use have made success unlikely.