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Watershed

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What is a Watershed?

A watershed is the area of land that drains into a body of water. A watershed is sometimes also referred to as a "river basin," a "river valley," or a "drainage basin." Ponds have watersheds, streams have watersheds, and so do rivers. As you can see, watersheds come in all shapes and sizes -- they may contain multiple towns or just a few houses.

Watersheds are "communities connected by water." What takes place on the land and waterways of one town affects the land and waterways of many other towns.

By working together and recognizing the mutual interests of protecting water for drinking, recreation, fisheries and wildlife, watershed communities can protect this critical resource for future generations.

Where is the Neponset River Watershed?

The Neponset River Watershed includes roughly 130 square miles of land located southwest of Boston. All of this land drains into the Neponset River, and ultimately in to Boston Harbor.

The Neponset River Watershed includes parts of 14 cities and towns:
Boston, Canton, Dedham, Dover, Foxborough, Medfield, Milton, Norwood, Randolph, Quincy, Sharon, Stoughton, Walpole and Westwood

Roughly 300,000 people live in the watershed. 

The Neponset River itself runs for 30 miles through the middle of the watershed. 
The River starts in Foxboro, near the Foxboro Stadium, and ends in Dorchester/Quincy, near the Boston Gas tank by I-93.

Because the Neponset River ultimately enters Boston Harbor, the Neponset River Watershed is itself a part of the larger Boston Harbor Watershed, along with the Mystic River Watershed to the north of Boston, the Charles River Watershed to the west of Boston and the Weymouth-Weir River Watersheds, which, like the Neponset River Watershed, originate south of Boston.

To download a PDF version of the basic watershed map, click here.