This powerpoint presentation outlines a study to develop a systematic approach to controlling algae growth within water treatment plants. The approach included: a literature review focusing on algae types and factors influencing algal growth; case studies involving 18 plants across the U.S.; an online survey of 200 utilities asking 53 questions on treatment train, algae issues within the treatment plant, types of algae identified, algae mitigation strategies, and successful strategies used; eight plants were sampled for algae characterization in pre-sedimentation basins, flocculation basins, sedimentation basins, and filters; and, optimal strategies for mitigating algae and costs. Algal control strategies included: Chemical Strategies; Operational Strategies; Design Strategies; and, Other Technologies.