What are some things that we know cause pollution? Pollution can come from anywhere and anyone. Putting salt on the roads, not picking up your dog’s waste, and running your car unnecessarily all creates pollution. When it rains or when snow melts, that pollution ends up in our waterways.
A watershed is like an upside down umbrella.
OK, let me explain. What is a watershed? A watershed is an area of land drained by a river and its tributaries (smaller creeks) to a common outlet. This outlet may be a basin, large stream, lake, wetland or ocean.
A watershed includes everything in its boundaries: land, air, surface water , underground water, plants, animals (this includes humans!), mountains, cities and forests.