Harmful algal blooms (HABs) occurring in freshwater, and the associated toxins they produce, are dangerous to animals and humans. The increasing presence of HABs is a major challenge facing water managers and drinking water utilities across the world. This book explores the current research on removal of HABs and toxins from drinking water, and provides the necessary tools so that treatment plant operators, engineers, and water managers can understand the vulnerability of drinking water treatment plants to HABs and develop treatment processes to minimize their impact.