Community public water suppliers get their water from either a waterwell or from a reservoir . They then must properly filter and disinfect the water to make it safe for drinking. These watersheds contain about 36,000 miles of streams and drain into the state's nine major drainage basins . A stream that flows into a larger stream or river. Contaminants can enter drinking water supplies from point or nonpoint sources .
Contaminants can move from land into groundwater or runoff into surface water .
As you watch it, remember the same problem occurs in Indiana as well.