The Delaware Watershed (HUC 13070002) covers an area of approximately 13,230 square miles, including parts of four states - New York, New Jersey, Pennsylvania, and Delaware. The watershed is fed by a network of small streams and tributaries that ultimately flow into the Delaware River, which empties into the Atlantic Ocean. The hydrology of the watershed is influenced by its geography, which includes the Appalachian Mountains and the coastal plain. The watershed experiences a range of climatic conditions, including heavy precipitation in the summer months and snowfall in the winter. In recent years, there have been concerns about the impact of climate change on the watershed, including increased frequency and severity of flooding. Surface water quality in the watershed is impacted by a variety of factors, including industrial and agricultural pollution. The watershed is also home to several large reservoirs, which provide drinking water for millions of people. Overall, the Delaware Watershed is an important ecological and economic resource for the region, and efforts are underway to protect and preserve its water resources for future generations.