The Delaware River Basin is a large watershed that spans parts of four U.S. states: New York, New Jersey, Pennsylvania, and Delaware. It covers approximately 13,539 square miles and is home to diverse ecosystems, including forests, wetlands, and rivers. The basin is vital for providing drinking water to millions of people and supports various recreational activities. The river itself flows about 330 miles from its source in the Catskill Mountains to its mouth at the Delaware Bay. The basin is also significant for its historical importance, as it played a key role during the American Revolution and continues to be a crucial resource for agriculture and industry.