National Water-Quality Assessment (NAWQA) Program
Nutrients National Synthesis

FACT SHEETS

Alexander, R.B., Slack, J.R., Ludtke, A.S., Fitzgerald, K.K., and Schertz, T.L., 1997, Data from selected U.S. Geological Survey national stream waterquality monitoring networks (WQN) on CD-ROM: U.S. Geological Survey Fact Sheet FS-013-97, 2 p.

Alexander, R.B., Smith, R.A., Focazio, M.J., and Horn, M.A., 1999, Source-Area Characteristics of Large Public Surface-Water Supplies in the Conterminous United States: An Information Resource for Source-Water Assessment, U.S. Geological Survey Fact Sheet 160-99, Reston, Virginia.

Graffy, Elisabeth A., Helsel, Dennis R., and Mueller, David K., 1996, Nutrients in the Nation's waters: Identifying problems and progress: U.S. Geological Survey Fact Sheet 218-96, 6 p.

Kolpin, Dana, Hallberg, George, Sneck-Fahrer, Debra, and Libra, Robert, 1997, Agricultural chemicals in Iowa's ground water, 1982-95¾What are the trends? U.S. Geological Survey Fact Sheet FS-116-97, 4 p.

Nolan, B.T., and Ruddy, B.C., 1996, Nitrate in ground waters of the United States¾Assessing the risk: U.S. Geological Survey Fact Sheet FS-092-96, 4 p.

U.S. Department of the Interior, U.S. Geological Survey Maintainer: Kerie Hitt (kjhitt@usgs.gov) Last update: 13:23:30 Tue 04 Mar 2003 Privacy Statement || Disclaimer || Accessibility URL: http://water.usgs.gov/nawqa/nutrients/fs.html