Minnesota Water Science Center
USGS IN YOUR STATE
USGS Water Science Centers are located in each state.
National Water Quality Assessment in the Upper Mississippi River Study Unit
Goals of the NAWQA Program are to describe the status and trends of the quality of the Nation's streams, rivers, and aquifers and to improve understanding of the natural and anthropogenic factors that affect the quality of these resources.
Major Findings 1995 to Present
Agricultural Activities Increase Nutrient and Pesticide Concentrations in Ground Water and Streams
Water Quality and Aquatic Biological Conditions are Indicative of Dominant Land Uses
Riparian Characteristics Influence Aquatic Communities
NAWQA Program Changes
In 2001, the NAWQA Program begins its second decade of intensive water-quality assessments, which will build upon initial assessments of water-quality conditions and increase understanding of long-term trends and the factors that affect water quality.
Status and Trends
Nutrient Enrichment Effects on Streams
The study objective is to determine how nutrient conditions vary as a result of natural and human-related factors, and how nutrient conditions affect algae and other biological communities.Regional Studies
Temporal trends in nutrients and suspended-sediments are being described for streams in the Upper Midwest.