Cascade’s mission is to provide water supply to meet current and future needs in a cost effective and environmentally sensitive manner. Lake Tapps is the first new source of drinking water in the region in decades. The responsibility of keeping Lake Tapps and all water bodies safe, clean, and enjoyable belongs to all of us. Pesticides, fertilizers and erosion from our landscapes and gardens may contaminate our water supply. This page will provide links on how to have a beautiful, pesticide-free yard.