This study was conducted to provide a mechanism with which utility managers could analyze the effects of upstream discharges on source waters. Specific components of the project included selection, implementation, and demonstration of a microcomputer-based commercial data base management system for water quality information; selection and demonstration of a water quality model to represent the movement and transportation of pollutants in a surface water source; assessment of the availability of industrial and municipal discharge information from government sources; and applications of the data base management system, water quality monitoring, and data base development to the lower Mississippi River. Includes 9 references, tables, figures.