The East River is a saltwater tidal estuary in New York City. The waterway, which is actually not a river despite its name, connects Upper New York Bay on its south end to Long Island Sound on its north end.
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Technically it's legal to swim in the East River, although it's also strictly forbidden to actually enter the river. Legalities aside, Mike Dulong, senior attorney for the New York water quality advocacy group Riverkeeper, claims that the East River isn't as unsanitary as the average New Yorker might assume.
Experience the Hudson RiverToday, the Hudson's waters flow cleaner than they have in decades. Years of hard work by dedicated scientists, government officials, and river-lovers have opened the Hudson's shores to swimming, fishing, and boating.
The Hudson River, which flows 301 miles from Lake Tear of the Clouds in the Adirondacks to New York Harbor, is the longest river completely in New York State. It is also the deepest, reaching depths of over 200 feet in spots.