Title: Food and water in New York City
Content:   Government officials, labor organizers, non-profits, community advocacy groups, and residents have a great dependency on rural farmers who develop New York City's local food shed. The process of linking agriculture with New York City's urban markets has been largely built upon the fact that New York City's water supply comes from the protected Catskill Mountains watershed in Upstate New York. New York City's water supply system, the largest surface storage and supply complex in the world, yields 1.2 e9USgal of water daily, with most of this water originating upstate. This water is unfiltered, and a filtration system would require $8–10 billion in construction as well as $1 million in daily maintenance. Instead, New York City's watershed is protected by severe New York City Department of Environmental Protection restrictions that prevent pathogens and nutrients from entering the water supply. As a result of protection of the watershed, New York is one of four major cities in the United States with drinking water that is pure enough to not require purification by water treatment plants. However, the implementation of such stringent regulations is costly to New York State farmers.
Title: New York metropolitan area
Content:  Water purity and availability are a lifeline for the New York metropolitan region. New York City is supplied with drinking water by the protected Catskill Mountains watershed. As a result of the watershed's integrity and undisturbed natural water filtration system, New York is one of only four major cities in the United States the majority of whose drinking water is pure enough not to require purification by water treatment plants. The Croton Watershed north of the city is undergoing construction of a US$3.2 billion water purification plant to augment New York's water supply by an estimated 290 million gallons daily, representing a greater than 20% addition to the city's current availability of water. The ongoing expansion of New York City Water Tunnel No. 3, an integral part of the New York City water supply system, is the largest capital construction project in the city's history, with segments serving Manhattan and The Bronx completed, and with segments serving Brooklyn and Queens planned for construction in 2020. Much of the fresh water for northern and central New Jersey is provided by reservoirs, but numerous municipal water wells exist which accomplish the same purpose.
Title: Manhattan
Content:  New York City is supplied with drinking water by the protected Catskill Mountains watershed. As a result of the watershed's integrity and undisturbed natural water filtration system, New York is one of only four major cities in the United States the majority of whose drinking water is pure enough not to require purification by water treatment plants. The Croton Watershed north of the city is undergoing construction of a US$3.2 billion water purification plant to augment New York City's water supply by an estimated 290 million gallons daily, representing a greater than 20% addition to the city's current availability of water. Manhattan, surrounded by two brackish rivers, had a limited supply of fresh water. 
Title: New York City water supply system
Content:   A combination of aqueducts, reservoirs, and tunnels supply fresh water to New York City. With three major water systems (Croton, Catskill, and Delaware) stretching up to 125 mi away from the city, its water supply system is one of the most extensive municipal water systems in the world. New York's water treatment process is simpler than most other American cities. This largely reflects how well protected its watersheds are. The city has sought to restrict development surrounding them. One of its largest watershed protection programs is the Land Acquisition Program, under which the New York City Department of Environmental Protection (DEP) has purchased or protected, through conservation easement, over 130000 acre since 1997. With all the care given, the city's water supply system is exempted from filtration requirements by both the federal and the state government, saving more than "$10 billion to build a massive filtration plant, and at least another $100 million annually on its operation". Moreover, the special topography the waterways run on allows 95% of the system's water to be supplied by gravity. The percentage of pumped water does change when the water level in the reservoirs is out of the normal range.
Title: New York City water supply system
Content:  New York City's water system consists of aqueducts, distribution pipes, reservoirs, and water tunnels that channel drinking water to residents and visitors. A comprehensive raised-relief map of the system is on display at the Queens Museum of Art. Until the early 21st century, some places in southeastern Queens received their water from local wells of the former Jamaica Water Supply Company.
Title: New York City
Content:  New York City is supplied with drinking water by the protected Catskill Mountains watershed. As a result of the watershed's integrity and undisturbed natural water filtration system, New York is one of only four major cities in the United States the majority of whose drinking water is pure enough not to require purification by water treatment plants. The city's municipal water system is the largest in the United States, moving over one billion gallons of water per day. The Croton Watershed north of the city is undergoing construction of a $3.2 billion water purification plant to augment New York City's water 
Title: New York City water supply system
Content: The New Croton Aqueduct, completed in 1890, brings water from the New Croton Reservoir in Westchester and Putnam counties. ; The Catskill Aqueduct, completed in 1916, is significantly larger than New Croton and brings water from two reservoirs in the eastern Catskill Mountains. ; The Delaware Aqueduct, completed in 1945, taps tributaries of the Delaware River in the western Catskill Mountains and provides approximately half of New York City's water supply. The water system has a storage capacity of 550 e9USgal and provides over 1.2 e9USgal per day of drinking water to more than eight million city residents, and another one million users in four upstate counties bordering on the system. Three separate sub-systems, each consisting of aqueducts and reservoirs, bring water from Upstate New York to New York City: The latter two aqueducts provide 90% of New York City's drinking water, 
Title: Upstate New York
Content:  New York City is dependent on upstate for a variety of services; the latter is the source of the city's water supply via the Delaware Aqueduct and the Catskill Aqueduct; much of the city's electric power supply comes from state owned hydroelectric plants at Niagara Falls and the St. Lawrence River; and most of the state's prisons are upstate; hence the popular term "being sent up the river" (however, the term originally referred to Sing Sing, which is "up the Hudson River" from New York City, but being in Ossining in Westchester County is still in the "downstate" region). Conversely, the operation of state facilities providing these services is an important part of the upstate economy.
Title: Environmental issues in New York City
Content:  Many of the city's environmental assets are related to geography and a long tradition of environmental stewardship in the mountain ranges north of the city. Because the watershed is in one of the largest protected wilderness areas in the United States, the natural water filtration process remains intact. As a result, New York is one of only five major cities in the United States with drinking water pure enough to require only chlorination to ensure its purity at the tap under normal conditions. However, all groundwater entering New York City's distribution system is treated with chlorine, fluoride, food-grade phosphoric acid, and, in some cases, sodium hydroxide. New York City uses 
Title: Kensico Reservoir
Content:  The water in the reservoir either provides NYC with water, or it travels down the spillway at the southernmost dam, and continues down the rest of the Bronx River, eventually flowing to the East River. The water that does supply New York City travels down either the Catskill Aqueduct or the Delaware Aqueduct. If it goes down the Delaware Aqueduct, it will pass through Yonkers, and flow through the Hillview Reservoir. It then continues through The Bronx, Manhattan, Brooklyn, and then stops at Staten Island. If it flows through the Catskill Aqueduct, It will stop at the Hillview Reservoir, and continue on through The Bronx, Queens, Brooklyn, and then stop at Staten Island.

Question: where does water come from in new york city?
Answer: The Catskill Aqueduct.
The Delaware Aqueduct.
The New Croton Aqueduct.