1. Water a single resource

2. Watershed Area that contributes water to a particular point on a stream or other surface-water feature, such as a lake Based on concept that “water runs downhill” Also called drainage basin or catchment

3. Land use affects the quality of ground water

4. Contaminants can come from many sources

6. Triple Divide Peak Saskatchewan River to Hudson Bay Saskatchewan River to Hudson Bay Columbia River to Pacific Columbia River to Pacific Mississippi River to Gulf of Mexico Mississippi River to Gulf of Mexico

7. Housatonic River Watershed