Features

• Nutrients in streams and rivers across the Nation--1992-2001 (Mueller and Spahr, 2006)
• Vulnerability of shallow groundwater and drinking-water wells to nitrate in the United States (Nolan and Hitt, 2006)
• Reports from studies of effects of nutrient enrichment on stream ecosystems
• Understanding nutrients in surface water using the national SPARROW model
• Linking ground water age and chemistry data along flow paths: implications for trends and transformations of nutrients and pesticides (Tesoriero and others, 2007)
• Drinking-water nitrate and health--Recent findings and research needs (Ward and others, 2005)
• Recent USGS articles evaluating nutrient transport and fate in the unsaturated zone, the aquifer, and the streams in five agricultural watersheds:
  • Nitrogen fluxes through unsaturated zones in five agricultural settings across the U.S. (Green and others, 2008)
  • Limited occurrence of denitrification in four shallow aquifers in agricultural areas of the U.S. (Green and others, 2008)
  • Transport and fate of nitrate at the ground-water/surface-water interface (Puckett and others, 2008)
  • Whole-stream response to nitrate loading in three streams draining agricultural landscapes (Duff and others, 2008)
  • Comparative study of transport processes of nitrogen, phosphorus, and herbicides to streams in five agricultural basins, USA (Domagalski and others)
• Factors affecting nitrate transport to public supply wells (McMahon and others, 2008)
• Redox processes and water quality of selected principal aquifer systems (McMahon and Chapelle, 2007)
• Efficacy of algal metrics for assessing nutrient and organic enrichment in flowing waters (Porter and others, 2008)

National Data Sets

• Water-quality, streamflow, and ancillary data for nutrients in streams and rivers across the Nation, 1992-2001
• County-level estimates of nutrient inputs to the land surface 1982-2001
• Summary of nutrient concentrations for streams and ground water - July 2000 (Used by Heinz Center)
• Nutrient concentrations and yields in undeveloped stream basins - 2000
• Surface water (rivers and streams) - 1999
• Ground water (aquifers) - 1999
• Retrospective database for nutrients in ground water and surface water - 1996
• Other data (Ancillary, GIS)