Category talk:Watersheds of Boston Harbor
The eight watersheds are confirmed via the U.S. National Parks Service website.[1]
"Boston Harbor is a more than 50-square mile estuary that is part of the Massachusetts Bay system. Upland inflow into the harbor is derived from eight primary watersheds including the Quincy Bay, Inner Harbor, Winthrop Bay, Mystic River, Charles River, Neponset River, Weymouth River and Weir River watersheds (Leo et al., 1995)."