Editing Westchester County, New York (section)

===Watersheds===
[[File:CrotonReservoir2.JPG|thumb|upright|The [[New Croton Reservoir]] is the largest of many in the county.]]

Westchester County is divided into six primary [[drainage basin]]s or watersheds: the Upper and Lower Long Island Sound; and the Bronx, Upper Hudson, Lower Hudson, and Croton River basins. Within these primary drainage basins are approximately 60 smaller basins, or subwatersheds. The principal streams draining the southern part of the county include Beaver Swamp Brook, [[Blind Brook watershed|Blind Brook]], [[Bronx River]], [[Hutchinson River]], [[Mamaroneck River]], [[Saw Mill River]], Sheldrake River, Stephenson Brook and [[Tibbetts Brook (New York)|Tibbetts Brook]]. The primary streams draining the central part of the county include [[Byram River]], Kisco River, [[Mianus River]], Mill River, [[Pocantico River]] and Silvermine River. The principal streams draining the northern part of the county include Dickey Brook, Furnace Brook, Hallocks Mill Brook, Hunter Brook, Muscoot River, Peekskill Hollow Brook, and [[Titicus River]]. The county contains several major reservoirs; The [[Croton system]] and the [[Kensico Reservoir]] are important components of the New York City water supply system. The system is a series of interconnected reservoirs and lakes in northern Westchester and Putnam Counties that provide 10% of New York City's water under normal conditions and up to 30% in times of drought. The components of the system include the [[New Croton Reservoir]], the [[Cross River Reservoir]], the [[Titicus Reservoir]], the [[Amawalk Reservoir]], and the [[Muscoot Reservoir]]. Other major reservoirs are the [[Kensico Reservoir|Kensico]] and Byram Lake Reservoir, while there are a number of smaller reservoirs throughout the county.

The Westchester County Department of Planning divides the county into North, Central and South sub-regions.<ref name="Auto3Z-2"/>