Westchester County's Water Quality Protection Program for the Croton and Kensico Watersheds (In Westchester County, approximately 800,000 people drink from the watershed’s 19 reservoirs. Twelve of Westchester County’s 45 municipalities lie within the boundaries of the New York City Watershed.)
	Westchester County's Long Island Sound Watershed Management Westchester County's economic, recreational and environmental well-being is directly tied to the health of Long Island Sound.
The best US EPA page around with links to  watershed data and management information.
	New York City Department of Environmental Home Page