Your Watershed

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

The Neponset River Watershed is made up of a striking array of landscapes, habitats and species.  Its history includes 10,000 years of human habitation and over 375 years of industrialization.


The 30 mile long Neponset River starts in Foxborough, near Gillette Stadium, and ends in Dorchester/Quincy, near the “Rainbow Swash” gas tank by I-93. Click on map for larger view.

Roughly 300,000 people live in the watershed. Cities and towns include:

  • Boston (Dorchester, Hyde Park, Mattapan)
  • Canton
  • Dedham
  • Dover
  • Foxborough
  • Medfield
  • Milton
  • Norwood
  • Quincy
  • Randolph
  • Sharon
  • Stoughton
  • Walpole
  • Westwood

Notable features:

  • the 30 mile long Neponset River
  • Fowl Meadow
  • Blue Hills
  • Baker Dam
  • Tileston and Hollingsworth Dam
  • the Neponset Estuary
  • Neponset RiverWalk and Greenway
  • Squantum Point Park



watershed animation

Watershed map from the Rockingham County, NC website.

A watershed is the area of land that drains into a body of water, like a river, pond, harbor or lake.