In the early 1940's as stated in the New York Times, the Hudson River became contaminated with Polychlorinated biphenyls (PCB), that flowed from two General Electric factories that were later banned in 1977, as a health threat to people and wildlife. In high doses, they have been shown to cause cancer in animals and are listed by federal agencies as a probable human carcinogen. As New York City grew along the Hudson river, the sewage discharged increased. In 1965, NYS voters passed a Pure Water Bond Act to fund sewage treatment, which fund a billion dollars. In 1972, the Clean Water Act provided a billion more and made cleanup a national priority. Right off Manhattan, 150 million gallons of raw sewage entered the river until 1986, when
