What is the deepest hole in the Mississippi river?
The natural deepest hole in the entire Mississippi Drainage is off Algier's Point (opposite Jackson Square), where it dives to 250 feet deep. Most Rivergator sections are at least 90% wilderness and no more than 10% industry.
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Stretches of the Mississippi River within the park corridor exceed water quality standards for mercury, bacteria, sediment, PCBs (polychlorinated biphenyl), and nutrients. Unfortunately, these impairments can make the water unsuitable for fishing, swimming, and drinking.
How deep is the Mississippi? While mere inches at the headwaters, the river's depth drops dramatically once you get close to its mouth. The deepest point, near Algiers Point in New Orleans, is about 200 feet.
The average person can swim as fast as one to two miles per hour or at an average speed of 1.5 miles per hour. If a person were to swim the entire 24-hour day without stopping, they would cover 36 miles. It would take 65 days to swim the entire Mississippi River at this pace.
The Minnesota Pollution Control Agency(Thanks to the great work of public utilities, treated drinking water from the Mississippi is safe and delicious!)
The Gulf of Mexico dead zone is an area of hypoxic (link to USGS definition) (less than 2 ppm dissolved oxygen) waters at the mouth of the Mississippi River. Its area varies in size, but can cover up to 6,000-7,000 square miles.
The worst-ever dry period occurred in the late 1500s. However, the dry years of 2021 and 2022 exceeded the 1500's drought length. This means the last 22 years are the driest in 1,200 years.
Key Points: At a depth of 216 feet (though some sources say it's 202 ft), the Hudson River is the deepest river in the United States. The Hudson River's headwaters are located in the Lake Tear of the Clouds in New York's Adirondack Park. It travels 315 miles from that point to Upper New York Bay.
Many popular kinds of fish including bass, bream, crappie, freshwater drum, and small catfish (less that22 inches in length) are SAFE to eat. Farm-raised catfish are SAFE to eat.
Martin Strel: He is a Slovenian endurance swimmer who swam the entire length of the Mississippi River in 2002. The swim took him 68 days to complete and he covered a distance of 2,360 miles (3,800 km). Ross Edgley: He is a British adventurer and athlete who swam the entire length of the Mississippi River in 2018.