Pretreatment programs are designed to control the introduction and quality of industrial wastewater. The Pretreatment Reader is an edited compendium of useful discussion papers written by and for the technical and management staffs of publicly owned water pollution control authorities. The Resource Reader is concerned with the organizational, financial, legal, and technical aspects of locally established pretreatment programs. Chapters are devoted to experiences in conducting effective industrial waste surveys, securing legal authorities, setting local effluent standards, design of monitoring systems, sludge disposal aspects, and other topics. The Resource Reader is the outgrowth of a two year effort conducted by the Association of Metropolitan Sewerage Agencies and supported by a grant from the U.S. Environmental Protection Agency. Regional seminars and a national symposium were held to enable local agencies better understand the importance of pretreatment and the difficulties associated with it. It should be a valuable tool for agencies in the process of either developing or implementing a local pretreatment program.