What is a watershed?
A watershed is a geographic area of land across which water flows on its way to a common outlet -- a stream, lake or river. Everyone lives in a watershed: even if a stream is not in your backyard you still live in a watershed.
Watersheds can be many different sizes: varying from the largest river basins to just a few acres in size. Because they are determined by topography, watersheds often cross political boundaries.
A watershed includes not only the land within its boundaries but also the surface water (lakes, streams and wetlands) and the groundwater. In this way, watersheds provide a natural link between the land, water resources and the living things, including people, within them.
How we occupy and manage the land directly affects the quality and quantity of our water resources.