When you learn about pollution in a watershed, you will find out what a watershed is, how human activities can damage it, and a lot about non-point source pollution effects on our watershed. This “watershed model” will help you discover many of the pollution sources that contaminate the St. Louis River and surrounding watershed. The most important thing you will learn today is what you can do to prevent nonpoint source pollution and keep our rivers and watershed clean for everyone, now and in the future!