Drainage Area
  • 27,510 mi2 (Total); 20,960 miles2 (Pennsylvania)

  • 444 miles from Otsego Lake, Cooperstown, NY to Harve de Grace, MD, where it empties into the Chesapeake Bay and the Atlantic Ocean.

Major Tributaries
  • Juniata, Lackawanna, Susquehanna and West Branch Susquehanna Rivers.

  • 3.8 million people live within the watershed.

Consumptive Uses
  • The Susquehanna is a source of drinking water for millions of people (446 million gallons of water per day at peak use).

Agricultural Uses
  • Agriculture is a leading industry throughout much of Pennsylvania, and the lands comprising the Susquehanna River Basin are no exception. Dairy, cattle, chicken, egg, hog, fruit, and feed and vegetable crop production can all be found within the basin. Some of the most fertile agricultural land in the United States is located in Lancaster County, Pennsylvania.

Unique Features
  • The river is almost a mile wide at Harrisburg.
  • 60% of its watershed is forested.
  • It comprises 43% of the Chesapeake Bay's drainage area (the river itself provides over 50% of the freshwater that enters into the Bay).
  • It is the 16th largest river in the United States.
  • It is the largest commercially non-nagavigable river in North America.
  • It is the largest river lying entirely in the U.S. that drains into the Atlantic Ocean.
  • The basin is one of the most flood prone areas of the United States. Major floods occur every 20 years. Average annual flood damage is $113 million.
    It has an operating ferry at Millersburg, Pennsylvania.