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The dead zone is an area where nutrient pollution from lawns, sewage treatment plants, farm land and other sources along the Mississippi River wash into the Gulf of Mexico, causing algae blooms that deplete oxygen from the water and make it difficult for marine life to survive.
NOAA-supported scientists announced today that this year’s Gulf of Mexico “dead zone” — an area of low to no oxygen that can kill fish and marine life — is approximately 6,705 square miles, the 12th largest zone on record in 38 years of measurement.
Such a dead zone exists in the Gulf of Mexico, and it is at its largest size since measuring began in 1985 — roughly the size of New Jersey. The large size is concerning considering the massive impacts the dead zone has on the Gulf of Mexico and the Gulf Coast area.
The Gulf of Mexico dead zone is one of the largest in the world. Marine dead zones can be found in the Baltic Sea, Black Sea, off the coast of Oregon, and in the Chesapeake Bay. Dead zones may also be found in lakes, such as Lake Erie.
Every summer, the dead zone—or hypoxic zone—in the Gulf of Mexico results in millions of acres of habitat potentially unavailable to fish and bottom species. Learn how we all play a role in contributing to the dead zone and what steps we can take to fix it.
NCCOS-supported scientists have determined that this year’s Gulf of Mexico “dead zone” — an area of low oxygen that can kill fish and marine life — is approximately 6,705 square miles, equivalent to more than four million acres of habitat potentially unavailable to fish and bottom species.
The 2021 Gulf of Mexico Hypoxic Zone, or Dead Zone, an area of low oxygen that can kill fish and marine life near the bottom of the sea, measures six thousand three hundred and thirty four square miles. This year's dead zone is larger than the average measured over the past five years.
Today, NOAA-supported scientists announced that this year’s Gulf of Mexico “dead zone”— an area of low to no oxygen that can kill fish and marine life — is approximately 3,058 square miles.
Today, NOAA-supported scientists announced that this year’s Gulf of Mexico “dead zone”— an area of low to no oxygen that can kill fish and marine life — is approximately 6,334 square miles, or equivalent to more than four million acres of habitat potentially unavailable to fish and bottom species.
At 6,705 square miles, the 2024 hypoxic zone in the Gulf of Mexico is the 12th largest ever measured in the 38-year record, measured from July 21 to July 26, 2024. Red area denotes 2 milligrams per liter of oxygen or lower, the level which is considered hypoxic, at the bottom of the seafloor.