Polluted stormwater runoff is the number one threat to the water quality of Puget Sound. Our salmon and other aquatic life depend on clean water for their survival. The purpose of the Elementary Stormwater Curriculum is to develop an understanding of the serious issues facing our community from stormwater runoff and to share specific actions we can take to improve the quality of our water. In this unit, students will be introduced to a problem solving model where they think like an engineer and explore ways to solve the problem of polluted stormwater runoff.