A watershed is an area of land where all the water drains into a common body of water, such as a river, lake, or ocean. In the United States, there are several major watersheds, including the Mississippi River Watershed, which is one of the largest, covering parts of 31 states. Each watershed plays a crucial role in collecting rainfall and melting snow, directing water flow, and supporting ecosystems. Watersheds are essential for managing water resources and protecting the environment. They help filter pollutants, provide habitats for wildlife, and supply drinking water to communities. Understanding the boundaries and health of these watersheds is vital for sustainable land use and conservation efforts across the country.