This book provides practicing engineers with water-based environment engineering from theory to practice by presenting the principles of water treatment, wastewater treatment, water reuse, water quality, and overviews of regulations regarding pollution control and drinking water quality. The Eighth Edition features new and updated coverage of GIS, climate change, alternative water supply development, hydraulics, stormwater treatment techniques, water quality regulations, filter design, and more. Recognizing that all waters are potential sources of supply, the authors present treatment processes in the context of what they can do, rather than dividing them along clean water or waste water lines. For practicing engineers who need a good reference book and for those preparing to take the examination for licensing as a professional engineer.