THE DELAWARE WATERSHED BY STATES
The mainstream Delaware River, the longest un-dammed river east of the Mississippi, extends 330 miles from the confluence of its East and West branches near Hancock, New York, to the mouth of the Delaware Bay.
Almost 7 percent of the nation's population relies on the basin's waters for drinking and industrial use, and the bay is but a gas tank away for roughly 40 percent of the people living in the United States. Yet, the watershed drains only 0.4 percent of the continental U.S. land area.
In all, the basin comprises 13,539 square miles, including portions of Delaware, New Jersey, New York, Pennsylvania and and a tiny portion of northeast Maryland.
(Facts from the Delaware River Basin Commission)