Newtown Creek is a 3.5-mile (6-kilometer) long estuary that forms part of the border between the boroughs of Brooklyn and Queens, in New York City. Channelization made it one of the most heavily used bodies of water in the Port of New York and New Jersey and thus one of the most polluted industrial sites in the US, containing years of discarded toxins, an estimated 30 million US gallons (110,000 m³) of spilled oil, including the Greenpoint oil spill, raw sewage from New York City’s sewer system, and other accumulation from a total 1,491 sites.