The Susquehanna River watershed comprises 43% of the Chesapeake Bay watershed. The Lower Susquehanna (the bottom-third of the Susquehanna River) includes over 9,000 square miles of the Susquehanna watershed, and is located predominantly in Pennsylvania, with a small stretch in Maryland. Nearly 2.5 million people live in the Lower Susquehanna River watershed. The Lower Susquehanna feeds directly into the Chesapeake Bay, adding over 22 billion gallons of water each day. The Susquehanna River has been named America’s Most Endangered River twice—once in 2005, and again in 2011. Overdevelopment, agricultural run-off, and water flow impairments are just some of the many threats to the Susquehanna River. (Based on Lower Susquehanna Riverkeeper.)
