1. Introduction -- 2. Occurrence and ecology of harmful algal blooms -- 3. Toxin properties, toxicity, and health effects -- 4. Regulation of HABs and HAB toxins in surface and drinking water -- 5. Source water control of harmful algal blooms and toxins -- 6. Conventional treatment processes for removal of HAB cells and toxins from drinking water -- 7. Advanced treatment processes for the removal of HAB cells and toxins from drinking water -- 8. Summary and conclusions.