Water purity and availability Manhattan

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new york city supplied drinking water protected catskill mountains watershed. result of watershed s integrity , undisturbed natural water filtration system, new york 1 of 4 major cities in united states majority of drinking water pure enough not require purification water treatment plants. croton watershed north of city undergoing construction of us$3.2 billion water purification plant augment new york city s water supply estimated 290 million gallons daily, representing greater 20% addition city s current availability of water. manhattan, surrounded 2 brackish rivers, had limited supply of fresh water. satisfy growing population, city of new york acquired land in adjacent westchester county , constructed old croton aqueduct system there, went service in 1842 , superseded new croton aqueduct, opened in 1890. this, however, interrupted in 2008 ongoing construction of us$3.2 billion water purification plant can supply estimated 290 million gallons daily when completed, representing 20% addition city s availability of water, addition going manhattan , bronx. water comes manhattan through new york city water tunnel no. 1, tunnel no. 2, , tunnel no. 3, completed in 1917, 1936, , (manhattan s supply) 2013, respectively.








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