This publication provides over 450 pages of introductory technical guidance for civil engineers, environmental engineers and other professional engineers and construction managers interested in design and construction of wastewater collection and treatment systems. Here is what is discussed: 1. ACTIVATED SLUDGE WASTEWATER TREATMENT PLANTS, 2. ADVANCED WASTEWATER TREATMENT, 3. DOMESTIC WASTEWATER TREATMENT, 4. HYDRAULIC DESIGN OF SEWERS, 5. OILY WASTEWATER COLLECTION AND TREATMENT, 6. DRAINAGE PIPE STRENGTH, COVER AND BEDDING, 7. PRELIMINARY WASTEWATER TREATMENT, 8. PRIMARY WASTEWATER TREATMENT, 9. SLUDGE HANDLING, TREATMENT AND DISPOSAL, 10. SMALL FLOW WASTE TREATMENT SYSTEM, 11. WASTEWATER COLLECTION AND PUMPING, 12. WASTEWATER COLLECTION AND TREATMENT IN COLD REGIONS.