This study produced a clearinghouse of practical resources to manage and prevent disruptive aquatic species occurrence and mitigate their impacts. Three Pacific Northwest utilities challenged by algal blooms, zooplankton populations, and other invasive aquatic species were comprehensively studied. The study also serves as a model on how to foster regional cooperation in confronting challenging issues. In addition to the research report, the appendices include a risk assessment tool, which can be found under Project Resources/Project Papers. Tailored collaboration partners: Everett Public Works Department, Seattle Public Utilities, Tacoma Public Utilities. Published in 2015.