Introductory technical guidance for civil and environmental engineers and wastewater treatment plant operators interested in upgrading effluent from wastewater treatment ponds. Here is what is discussed: 1. INTRODUCTION 2. SOLIDS REMOVAL METHODS 3. OPERATIONS MODIFICATIONS AND ADDITIONS 4. CONTROL OF ALGAE AND DESIGN OF SETTLING BASINS 5. COMPARISON OF VARIOUS DESIGN PROCEDURES 6. OPERATIONAL MODIFICATIONS TO FACULTATIVE PONDS 7. COMBINED SYSTEMS 8. PERFORMANCE COMPARISONS WITH OTHER REMOVAL METHODS.