"Sixth in the series of Clean Water Reports to Congress."

"The first chapter, in addition to introducing the report, summarizes its content and conclusions. The second chapter of the report examines the nature of and trends in water quality ... The third chapter describes the status of public sewerage services and the costs of municipal facilities to meet the 1977 standards as reported in a nationwide survey of municipal sewer and treatment plant needs. The fourth chapter describes the costs of controlling industrial nonthermal pollution for meeting the 1977 effluent standards. In addition, it reports on the costs of controlling industrial thermal pollution to meet both the 1977 and 1983 standards. The fifth chapter reports on the capacity of U.S. agriculture to meet food and fiber demand to the year 2000 under environmental restrictions on soil loss and use of nitrogen fertilizers ... The sixth chapter is an introduction to benefit analysis ... The seventh chapter reviews potential problems in implementing the 1972 Amendments."--Page 1. Introduction -- Nature of and trends in water pollutants -- Municipal costs -- Industrial costs -- Nonpoint pollution -- Benefits from water quality enhancement -- Constraints.