A watershed is an area of land that drains all the streams, rainfall, and snowmelt to a common outlet such as the outflow of a reservoir, mouth of a bay, or ocean and consists of surface water, such as lakes, streams, reservoirs, and wetlands and all underlying groundwater. The word “watershed” is sometimes used interchangeably with drainage basin or catchment. Larger watersheds contain many smaller watersheds. Watersheds are critical because the water flowing over the land impacts habitat, and wildlife health supports various recreational activities and provides communities with drinking water.