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U.S. Geological Survey, 2001, Selected findings and current perspectives on urban and agricultural water quality by the National Water-Quality Assessment Program: U.S. Geological Survey Fact Sheet FS-047-01, 2 p.  Available Online

U.S. Geological Survey, 2001, National Water-Quality (NAWQA) Assessment Program Study Areas, 1991-2001: Pamphlet advertisement for 1994 Study-Unit Summary Reports, 4 p. 

Van Metre, P.C., Callender, Edward, Mahler, B.J., Wilson, J.T., and Dorsey, M.E., 2001, Differences in lake and reservoir sedimentation - Implications for sediment coring studies: Proceedings of the Seventh Interagency Sedimentation Conference, vol. 2, IX, p. 12-19. 

Welch, Alan, Ryker, Sarah, Helsel, Dennis, and Hamilton, Pixie, 2001, Arsenic in ground water of the United States: An overview: Water Well Journal, February 2001, p. 30-33. 

Wong, Charles S., Capel, Paul D., and Nowell, Lisa H., 2001, National-scale, field-based evaluation of the biota--Sediment accumulation factor model: Environmental Science & Technology, vol. 35, no. 9, p. 1709-1715.  doi: 10.1021/es0016452 Available Online

Zogorski, John S., Moran, Michael J., and Hamilton, Pixie A., 2001, MTBE and other volatile organic compounds--New findings and implications on the quality of source waters used for drinking-water supplies: U.S. Geological Survey Fact Sheet FS-105-01, 2 p.  Available Online

Alexander, Richard B., Smith, Richard A., and Schwarz, Gregory E., 2000, Effect of stream channel size on the delivery of nitrogen to the Gulf of Mexico: Nature, vol. 403, February 17, 2000, p. 758-761.  Available Online

Alexander, Richard B., Smith, Richard A., Schwarz, Gregory E., Preston, Stephen D., Brakebill, John W., Srinivasan, Raghavan, and Pacheco, Percy A., 2000, Atmospheric nitrogen flux from the watersheds of major estuaries of the United States: An application of the SPARROW watershed model: American Geophysical Union, p. 119-170. 

Baehr, Arthur L., Charles, Emmanuel G., and Baker, Ronald J., 2000, Field evidence for degradation of methyl tert-butyl either (MTBE) at low concentrations in the unsaturated zone: EPA/API Workshop on MTBE Biodegradation, Cincinnati, Ohio, February 1-3, 2000. 

Clark, Gregory M., Mueller, David K., and Mast M. Alisa, 2000, Nutrient concentrations and yields in undeveloped stream basins of the United States: Journal of the American Water Resources Association, vol. 36, no. 4, August 2000, p. 849-860.  doi: 10.1111/j.1752-1688.2000.tb04311.x Available Online

Focazio, Michael J., Welch, Alan H., Watkins, Sharon A., Helsel, Dennis R., and Horn, Marilee A., 2000, 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 WRIR 99-4279, 21 p.  Available Online

Foreman, W.T., Majewski, M.S., Goolsby, D.A., Wiebe, F.W., and Coupe, R.H., 2000, Pesticides in the atmosphere of the Mississippi River Valley, part II--air: The Science of the Total Environment, vol. 248, p. 213-216.  doi: 10.1016/S0048-9697(99)00544-6 Available Online

Francy, Donna S., Helsel, Dennis H., and Nally, Rebecca A., 2000, Occurrence and distribution of microbiological indicators in ground water and stream water: Water Environment Research, vol. 72, no. 2, p. 152-161.  doi: 10.2175/106143000X137220 Available Online

Goolsby, D.A., 2000, Mississippi Basin nitrogen flux believed to cause Gulf hypoxia: EOS Transactions, American Geophysical Union, vol. 81, no. 29, p. 321 & 326-327. 

Hamilton, Pixie, 2000, Water quality: Why geology matters: Geotimes, June 2000, p. 20-23. 

Hamilton, Pixie, 2000, Fertile research: The U.S. Geological Survey's National Water-Quality Assessment Program provides food for thought on the variability of water quality across the nation: Water Environment and Technology, vol. 12, no. 2, p. 26-32. 

Hoffman, Ryan S., Capel, Paul D., and Larson, Steven J., 2000, Comparison of pesticides in eight U.S. urban streams: Environmental Toxicology and Chemistry, vol. 19, no. 9, p. 2249-2258.  doi: 10.1897/1551-5028(2000)019<2249:COPIEU>2.3.CO;2 Available Online

Hopkins, Evelyn H., Hippe, Daniel J., Frick, Elizabeth A., and Buell, Gary R., 2000, Organophosphorus pesticide occurrence and distribution in surface and ground waters of the United States, 1992-97: U.S. Geological Survey Open-File Report 00-187, 4 p.  Available Online

Johnson, Richard, Pankow, James, Bender, David, Price, Curtis, and Zogorski, John, 2000, MTBE--To what extent will past releases contaminate community water supply wells: Environmental Science & Technology, May 2000, p. 210-216.  Available Online

Kolpin, Dana W., Barbash, Jack E., and Gilliom, Robert J., 2000, Pesticides in ground water of the United States, 1992-1996: Ground Water, vol. 38, no. 6, p. 858-863.  Available Online

Lapham, Wayne W., Moran, Michael J., and Zogorski, John S., 2000, Enhancements of nonpoint source monitoring of volatile organic compounds in ground water: Journal of the American Water Resources Association, vol. 36, no. 6, December 2000, p. 1321-1334.  doi: 10.1111/j.1752-1688.2000.tb05729.x Available Online

Majewski, Michael S., Foreman, William T., and Goolsby, Donald A., 2000, Pesticides in the atmosphere of the Mississippi River Valley, part I-- rain: The Science of the Total Environment, vol. 248, p. 201-212.  doi: 10.1016/S0048-9697(99)00543-4 Available Online

McMahon, P.B., Bruce, B.W., Becker, M.F., Pope, L.M., and Dennehy, K.F., 2000, Occurrence of nitrous oxide in the Central High Plains Aquifer,1999: Environmental Science and Technology, vol. 34, no. 23, p. 4873-4877.  doi: 10.1021/es001233t Available Online

Moran, Michael J., Halde, Mike J., Clawges, Rick M., and Zogorski, John S., 2000, Relations between the detection of methyl tert-butyl ether (MTBE) in surface and ground water and its content in gasoline: in Proceedings of the American Chemical society, 219th ACS National meeting, 2000: San Francisco, CA, American, American Chemical Society, vol. 40, no. 1, p. 195-198. 

Moran, Michael J., Zogorski, John S., and Squillace, Paul J., 2000, MTBE in groundwater of the United States--Occurrence, potential sources, and long-range transport: Soil, Sediment & Groundwater MTBE special issue, p. 57-62.  Available Online

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