Changes in Nutrient and Sediment Concentrations in Streams and Rivers of the United States, 1993-2003

Science Center Objects

This archived site contains information about the USGS study of trends and changes in total phosphorus concentrations, total nitrogen concentrations, streamflow, phosphorus and nitrogen loading from manure and fertilizer, and nitrogen loading from atmospheric deposition in streams and rivers across the nation from 1993 to 2003.