This hydrologic study focuses on Wisconsin's Lake Superior Basin. Water is the most important natural resource in this area which includes Douglass, Bayfield, Ashland, and Iron counties. This study was undertaken to determine the character of this hydrologic base and to determine the effects and extent of man-influenced disturbances. It includes an introduction, objectives, field sampling and laboratory analysis techniques, a discussion of individual control basin characteristics, a resume, future projections, a public education program, and appendices. The objectives of the study are the compilation of pertinent literature, a hydrologic and topographic analysis, a study of the present status and future predictions, a measurement of waste water assimilation, and the development of a public education program. Using both field and laboratory techniques, such factors as stream discharge, ph, and nitrates were examined. It was found that in both the eastern and western sectors of the basin, the wastes showed an above average bacteria count, with most other factors testing above minimum standards. A public education program has been included to promote public understanding in light of the present conditions and the population, recreational, and industrial pressures which will shape the hydrologic future of the area. (TK)