A comprehensive technical manual presenting principles and practical methods for planning, designing, constructing, and maintaining urban sewerage systems and for treating sewage. It covers preliminary investigations and financing; estimation of dry-weather and storm flows; sewer hydraulics and pipe sizing; layout and appurtenances such as manholes and inlets; pumps and pumping-station design; materials selection; and sewage treatment processes including activated sludge. The material pairs theoretical explanations with formulas, diagrams, examples, and bibliographic references to aid practical application in both classroom and field work.