Cascade's mission is to provide water supply to meet current and future needs of our members in a cost-effective and environmentally responsible manner through partnerships, water efficiency programs, acquiring, constructing and managing water supply infrastructure and fostering regional water planning. Cascade is a municipal corporation comprised of seven municipalities (five cites and two water and sewer districts) in the Puget Sound region that joined together to provide safe, clean, reliable water supply to its 350,000 residences and more than 20,000 businesses.