Sediments, nutrients, and oxygen-demanding substances in the Minnesota River: Selected water-quality data, 1989-90

This report presents selected physical and chemical data collected by the U.S. Geological Survey for the Minnesota River Assessment Project, a four-year interagency study coordinated by the Minnesota Pollution Control Agency. Water samples were collected at 12 sites on the Minnesota River and at the mouths of 10 major tributary streams located from the outlet of Lac qui Parle Reservoir to Henderson, Minnesota. Sampling from August 1989 through September 1990 resulted in collection of 171 stream-water samples. This report includes data on streamflow, total suspended solids, nitrite plus nitrate nitrogen, total phosphorus, biochemical oxygen demand, and chlorophyll a.