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Concentrations and annual fluxes for selected water-quality constituents from the USGS National Stream Quality Accounting Network (NASQAN), 1996-2000

By Valerie J. Kelly, Richard P. Hooper, Brent T. Aulenbach, and Mary Janet

Water-Resources Investigations Report 01-4255

Reston, Virginia: 2001

U.S. Department of the Interior Gale Norton, Secretary
U.S. Geological Survey Charles G. Groat, Director
For further information contact: Office of Water Quality
U.S. Geological Survey
412 National Center
Reston, Virginia 20192
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