Theoretical aspects of unit operations for water treatment with design applications. Topics include water characteristics and contaminants, coagulation, flocculation, sedimentation, filtration, adsorption, ion exchange, membrane processes, disinfection and disinfection by-products, and management of water treatment residuals. Laboratory procedures include: settling operations, filtration, aeration, and adsorption. Credit cannot be counted for both ENVE 3123 and ENVT 3123.