Features

• USGS Circular 1350: Nutrients in the Nation's Streams and Groundwater
• Nitrate in the Mississippi River and its tributaries, 1980 to 2008: Are we making progress? (Sprague and others, 2011)
• Nitrogen Contamination of Surficial Aquifers -- A Growing Legacy (Puckett and others, 2011)
• Nitrate in groundwater of the United States, 1991-2003 (Burow and others, 2010)
• Predicting Unsaturated Zone Nitrogen Mass Balances in Agricultural Settings of the United States (Nolan and others, 2010)
• Changes in Streamflow and the Flux of Nutrients in the
  Mississippi-Atchafalaya River Basin, USA, 1980–2007 (Battaglin and others, 2010)
• Nitrate loads and concentrations in surface-water base flow and shallow groundwater for selected basins in the United States, water years 1990–2006 (Spahr and others, 2010)
• Development and Application of Regression Models for Estimating Nutrient Concentrations in Streams of the Conterminous United States, 1992–2001 (Spahr and others, 2010)
• Nutrient trends in streams and rivers of the United States, 1993-2003 (Sprague and others, 2009)
• Decadal-scale changes of nitrate in ground water of the United States, 1988-2004 (Rupert, 2008)
• 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)
• May/June 2008 JEQ articles evaluating nutrient transport in five agricultural watersheds
• 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

• County-level esitmates of nitrogen and phosphorus from fertilizer, 1987-2006
• 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)