During the period extending from May 1972 through April 1973, an investigation of the overall water quality conditions of streams flowing into Lake Superior from the entire state of Wisconsin was conducted. The goal of this publication was to provide much needed regional information on water quality, drainage basins, pollution sources and loads, and population distribution for use in regional planning and problem solving efforts. This report is a supplement to that original document. The reasons for this additional study are: because of the unusual weather patterns during the first year of the study, a second year of sampling was essential in order to obtain more normalized data. Second, the initial study turned up areas and portions of streams where additional sampling points were necessary to pinpoint pollution sources or watershed problems. Third, it was proposed that increased efforts on the red clay problem be carried out; and fourth, further information was necessary for a large-scale public education outreach program. This second year effort, conducted during the period May 1973-April 1974, fulfills these four objectives. (Author/BT)