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Trace Elements National Synthesis Project

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National data on trace elements in water, stream and reservoir bed sediments, and aquatic biota

• Arsenic in ground water (20,043 USGS samples)


• Arsenic, cadmium, chromium, copper, lead, mercury, nickel, selenium, and zinc in streambed sediment


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• Data from the USGS National Stream Water-Quality Monitoring Network


• Search all USGS National Water Information System data (NWISweb)

Arsenic concentration data for 20,043 ground-water samples collected in 1973-2001 from across the U.S.

Dataset

• 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

Related publications

• 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.

***Superseded arsenic data***

Arsenic concentration data for 18,850 ground-water samples collected in 1973-1997 from across the U.S.

Dataset

• Data compiled for WRI 99-4279; sampling dates from 1973-1997: 1.9 Mb text file

Concentration data for arsenic, cadmium, chromium, copper, lead, mercury, nickel, selenium, and zinc in 541 streambed-sediment samples collected in 1992-95 from 20 study areas across the U.S.

Dataset

• Excel97 workbook, containing one worksheet per study area

Related publications

• 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