National Water-Quality Assessment (NAWQA) Program
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Arsenic in ground water (20,043 USGS samples)
Arsenic, cadmium, chromium, copper, lead, mercury, nickel, selenium, and zinc in streambed sediment
Search all NAWQA data (Oracle interface)
Data from the USGS National Stream Water-Quality Monitoring Network
Search all USGS National Water Information System data (NWISweb)
Data compiled using the same methods and criteria as for WRI 99-4279, but extending the sampling dates until March 30, 2000: 6.8 Mb Excel file || 2.8 Mb text file
Ryker, S.J., Nov. 2001, Mapping arsenic in groundwater: Geotimes Newsmagazine of the Earth Sciences, v.46 no.11, p.34-36.
Welch, A.H., Watkins, S.A., Helsel, D.R., and Focazio, M.F., 2000, Arsenic in ground-water resources of the United States: U.S. Geological Survey Fact Sheet 063-00, 4 p.
Focazio, M.J., Welch, A.H., Watkins, S.A., Helsel, D.R., and Horn, M.A., 1999, A retrospective analysis on the occurrence of arsenic in ground-water resources of the United States and limitations in drinking-water-supply characterizations: U.S. Geological Survey Water-Resources Investigations Report 99-4279, 21 p.
Data compiled for WRI 99-4279; sampling dates from 1973-1997: 1.9 Mb text file
Excel97 workbook, containing one worksheet per study area
Rice, K.C., 1999, Trace-element concentrations in streambed sediment across the conterminous United States: Environmental Science and Technology, vol. 33 no. 15, p. 2499-2504. Abstract
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://water.usgs.gov/nawqa/trace/data/index.html
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Page Last Modified: Wednesday, 15-Oct-2008 13:26:20 EDT
