There was a series of problems that culminated with lead contamination, creating a serious public health danger. The Flint River water that was treated improperly caused lead from aging pipes to leach into the water supply, leading to extremely elevated levels of a heavy metal.
It is an area or ridge of land that separates waters flowing to different rivers, basins, or seas. Water is stored in wetlands, lakes, rivers, streams or underground sources which are linked in a watershed through the water cycle.
The hydrologic cycle begins with the evaporation of water from the surface of the ocean. As moist air is lifted, it cools and water vapor condenses to form clouds. Moisture is transported around the globe until it returns to the surface as precipitation.