These studies illuminate the implications of existing law for the establishment of a regional system of water quality management in the Wisconsin River Basin. Two studies examine Wisconsin experience under existing law. One of these reviews the application of the common law and how it has functioned; the other reviews Wisconsin experience in regulating water pollution by the Division of Environmental Protection of the Department of Natural Resources, and the work of conservation wardens in dealing with individual pollution cases. Three studies examine the effects of certain constitutional limitations for possible institutional changes that might be made to manage water quality. The first of these is concerned with the constitutional limitations on the construction and operation of water pollution abatement facilities. The second reviews four alternatives to divert state action to construct and operate such facilities, namely, by a state owned non-profit corporation, a special district, a private corporation, and a cooperative. The third study investigates the constitutional limitations on the use of effluent charges to regulate water pollution. (WRSIC abstract)