More than 700 coastal areas are affected by algal growth and dead zones, despite a growing number of global agreements to reduce water pollution.
Blog Posts: dead zones
Few programs have seen widespread success in tackling water quality problems in the Mississippi River Basin and Gulf of Mexico, but an emerging initiative could present a way forward. The U.S. Department of Agriculture (USDA) launched the Mississippi River Basin Healthy Watersheds Initiative (MRBI) in 2009. New WRI research finds that with some specific improvements, the MRBI’s new approach could play a key role in improving the nation’s inland and coastal water quality.
The Gulf of Mexico has the largest dead zone in the United States and the second-largest in the world. Dead zones form when excessive amounts of nitrogen and phosphorous wash into waterways and spur algal blooms, depleting the water of oxygen and killing fish, shrimp, and other marine life. The Gulf of Mexico dead zone can range between an astounding 3,000 and 8,000 square miles. At its largest, it’s about the size of Massachusetts.