Where does the Delaware River meet the ocean?

The river flows into Delaware Bay at Liston Point, 48 miles (77 km) upstream of the bay's outlet to the Atlantic Ocean between Cape May and Cape Henlopen.



The Delaware River officially meets the Atlantic Ocean at the Delaware Bay, a massive estuary located between the states of Delaware and New Jersey. After flowing roughly 419 miles from its headwaters in the Catskill Mountains of New York, the river broadens significantly south of Wilmington and Philadelphia. The geographical "mouth" where the bay opens into the open ocean is defined by Cape May in New Jersey to the east and Cape Henlopen in Delaware to the west. This transition zone is a critical ecological habitat, serving as one of the most important stopovers in the world for migratory shorebirds and a major breeding ground for horseshoe crabs. For 2026 travelers, the Cape May-Lewes Ferry provides a scenic way to cross the exact area where the river's fresh water finally merges with the salty brine of the Atlantic, marking the end of its long journey through four U.S. states.

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The Delaware River is tidally influenced for over 130 miles from the Atlantic Ocean to Trenton, N.J. This section of the river, which includes the cities of Wilmington, Del., Camden, N.J. and Philadelphia, Pa., is known as the Delaware Estuary.

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Delaware Water Gap is a water gap on the border of the U.S. states of New Jersey and Pennsylvania where the Delaware River cuts through a large ridge of the Appalachian Mountains.

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Supports the water needs of two of the nation's largest cities: Philadelphia and New York City, as well as ~one million people in northern New Jersey. Consumptive Use: Over 850 million gallons a day; this is water withdrawn from the Basin but not returned.

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The Delaware system, in parts of Delaware, Ulster and Sullivan Counties southwest of the Catskill watershed, includes 4 reservoirs which provide 50 percent of the City's daily water needs.

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Swimming in areas of the river outside the life guarded beaches is permitted, but not recommended. Strong currents, sharp drop-offs, and constantly changing river conditions make many areas unsafe for swimming. Wearing a properly fitting life jacket is strongly recommended when swimming. Never swim alone.

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For its size, the Upper Delaware River contains some of the highest water quality in the eastern United States. The upper portion of the watershed remains largely forested. These forests act as a natural buffer against pollution and erosion by filtering water, which is very important for maintaining water quality.

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However, the most famous fact about the Delaware River is the famous crossing of it by George Washington in 1776 which helped him successfully surprise Hessian troops in New Jersey during the American Revolution.

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No contaminants from the Bristol Township spill have been detected in the Delaware River water: tap water continues to be safe. Residents should continue to use tap water as they normally would.

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The Congo is the deepest river in the world. Its headwaters are in the north-east of Zambia, between Lake Tanganyika and Lake Nyasa (Malawi), 1760 metres above sea level; it flows into the Atlantic Ocean.

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How did the chemical spill happen? The spill occurred at a Trinseo plant in Bristol, Bucks County, on Friday, when the company said “an equipment failure” dumped about 8,100 gallons of latex emulsion solution into Otter Creek, a tributary of the Delaware River.

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Delaware Water Gap formed through a process of headward erosion and stream capture. Deformation of the bedrock during Appalachian mountain-building episodes hundreds of millions of years ago created an area of structural weakness in the rock.

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The Delaware River Basin has a very diverse ecosystem with a wide variety of wildlife. Eagles, bears, snakes, insects, beavers, otters, herons, Canadian geese, fish, eels, deer, and other animals can be found along the river banks.

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There are bull shark occasionally in the Delaware river. One was caught in a net in 1908 basically across the river from where the Philly Airport is today.

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On March 24, 2023, the Trinseo Altuglas chemical plant in Bristol, Pennsylvania in the United States had an equipment failure that resulted in a leak of between 8,100 and 12,000 gallons of butyl acetate, ethyl acetate, and methyl methacrylate into Otter Creek, a tributary of the Delaware River.

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The Port of Philadelphia is located on the Delaware River in Philadelphia in the U.S. state of Pennsylvania. Generally the term applies to the publicly owned marine terminals located within Philadelphia city limits along west bank of the river.

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The Delaware River is known for freshwater populations of striped bass, muskellunge, brown trout, yellow perch, and American shad. When you visit New Jersey, be sure to plan a Delaware River fishing trip.

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