What is a Watershed?
Land from which water drains into a common water body (river, pond, lake, reservoir) by way of streams, soil, and groundwater aquifers is called a Watershed. We all live in one!
The New York City Connection
The 1600-square-mile New York City Catskill-Delaware Watershed (also referred to as the West-of-Hudson, or WOH Watershed) is actually a web of smaller watersheds. Together, they drain into and fill six huge reservoirs that stretch across five counties and supply water to nine million people in NYC and its suburbs. This region is a crucial part of the vast New York City Water System.