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Stone, Wesley W.; Crawford, Charles G.; Gilliom, Robert J., 2013, Watershed Regressions for Pesticides (WARP) models for predicting stream concentrations of multiple pesticides: Journal of Environmental Quality, 42: 1838 - 1851 Available Online

Nowell, L.H., Moran, P.W., Gilliom, R.J., Calhoun, D.L., Ingersoll, C.G., Kemble, N.E., Kuivila, K.M., Phillips, P.J., 2013, Contaminants in stream sediments from seven U.S. metropolitan areas: I. Distribution in relation to urbanization: Archives of Environmental Contamination and Toxicology, v. 64, no.1, p. 32-51. Available Online

Kemble, N.E., Hardesty, D.K., Ingersoll, C.G., Kunz, J.L., Sibley, P.K., Calhoun, D.L., Gilliom, R.J., Kuivila, K.M., Nowell, L.H., Moran, P.W., 2013, Contaminants in stream sediments from seven U.S. metropolitan areas: II. Sediment toxicity to the amphipod Hyalella azteca and the midge Chironomus dilutus: Archives of Environmental Contamination and Toxicology, v. 64, no. 1, p. 52-64. Available Online

Nakagaki, Naomi, Hitt, K.J., Price, C.V., and Falcone, J.A., 2012, Methods to characterize environmental settings of stream and groundwater sampling sites for National Water-Quality Assessment: U.S. Geological Survey Scientific Investigations Report 2012?5194, 56 p. Available Online

Toccalino, P.L., Norman, J.E., Booth, N.L, Thompson, J.L., and Zogorski, J.S., 2012, Health-based screening levels: benchmarks for evaluating water-quality data: U.S. Geological Survey, National Water-Quality Assessment Program Available Online

Toccalino, P.L., Norman, J.E., and Scott, J.C., 2012, Chemical mixtures in untreated water from public-supply wells in the U.S.-Occurrence, composition, and potential toxicity: Science of the Total Environment, v. 431, p. 262-270. doi:10.1016/j.scitotenv.2012.05.044 Available Online

Bright, P.R., Buxton, H.T., Balistrieri, L.S., Barber, L.B., Chapelle, F.H., Cross, P.C., Krabbenhoft, D.P., Plumlee, G.S., Sleeman, J.M., Tillitt, D.E., Toccalino, P.L., and Winton, J.R., 2012, USGS Environmental health science strategy?Providing environmental health science for a changing world-Public review release: U.S. Geological Survey Open-File Report 2012?1069, 37 p. Available Online

Toccalino, P.L, Norman, J.E., and Scott, J.C., 2012, Chemical mixtures in water from public-supply wells in the U.S.?occurrence, composition, and potential toxicity. 2012 USGS National Groundwater Workshop, Lakewood/Golden, CO, August 6?8, 2012. Poster 11 Available Online

Moran, P.W., Kuivila, K.M., Hladik, M.L., Ingersoll, C.G., Kemble, N.E., Moran, P.W., Calhoun, D.L., Nowell, L.H., Gilliom, R.J., 2012, Contaminants in stream sediments from seven U.S. metropolitan areas: Data summary of a national pilot study: U.S. Geological Survey Scientific Investigations Report 2011-5092, 66 p. plus appendices. Available Online

Kuivila, K.M., Hladik, M.L., Ingersoll, C.G., Kemble, N.E., Moran, P.W., Calhoun, D.L., Nowell, L.H., Gilliom, R.J., 2012, Occurrence and potential sources of pyrethroid insecticides in stream sediments from seven U.S. metropolitan areas: Environmental Science and Technology, v. 46, no. 8, pp 4297-4303. Available Online

Stone, W.W., and Gilliom, R.J., 2012, Watershed Regressions for Pesticides (WARP) Models for Predicting Atrazine Concentrations in Corn Belt Streams. Journal of the American Water Resources Association, Vol. 48, No.5: 970-986. Available Online

Barbash, J.E., 2012, "Dehalogenation of environmental contaminants by sulfur nucleophiles in the hydrologic system." Presented at the 243rd national meeting of the American Chemical Society in San Diego, CA, March 25, 2012. Available Online

Norman, J.E., Toccalino, P.L., and Scott, J.C., 2012, Chemical Mixtures in Water from Public-Supply Wells in the U.S.--Occurrence, Composition, and Potential Toxicity, National Water Quality Monitoring Council's Eighth National Monitoring Conference, Portland, OR, April 30-May 4, 2012. Session G5, p. 74. Available Online

Stackelberg, P.E., Barbash, J.E., Gilliom, R.J., Stone, W.W., and Wolock, D.M., 2012, Regression models for estimating concentrations of atrazine plus deethylatrazine in shallow groundwater in agricultural areas of the United States. Journal of Environmental Quality 41(2). Available Online

Norman, J.E., Kuivila, K.M., and Nowell, L.H., 2012, Prioritizing pesticide compounds for analytical methods development: U.S. Geological Survey Scientific Investigations Report 2012-5045, 206 p. Available Online

Wieczorek, M.E., Nakagaki, N., and Falcone, J.A., 2011, Archiving and maintaining consistent watershed boundaries (abstract), from Proceedings: U.S. Geological Survey Eighth Biennial Geographic Information Science Workshop and the First National Map Users Conference, Denver, Colorado, May 10-13, 2011, U.S. Geological Survey Scientific Investigations Report 2011-5053, 41 p.

Toccalino, P.L, Norman, J.E., and Scott, J.C., 2011, Chemical mixtures in water from public-supply wells in the U.S.?occurrence, composition, and relative toxicity. International Toxicology of Mixtures Conference, Arlington, VA, October 21?23, 2011. Poster P2.27 Available Online

Toccalino, P.L, Norman, J.E., and Scott, J.C., 2011, Chemical mixtures in water from public-supply wells in the U.S.-occurrence, composition, and relative toxicity. International Toxicology of Mixtures Conference, Arlington, VA, October 21?23, 2011. Poster P2.27

Martin, J.D., 2011, How Good Is Your Number? Part 1: Measurement Variability [abs.], 32nd Annual Indiana Water Resources Association Conference: The Wabash River Watershed: Assessment, Management, and the Future, 2011, Ball State University Alumni Center, Muncie, Indiana: Indiana Water Resources Association. Available at URL Available Online

Martin, J.D.; Eberle, Michael; and Nakagaki, Naomi, 2011, Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2010: : U.S. Geological Survey Data Series 655, 23 p., 5 app. Available Online

Martin, J.D., and Eberle, Michael, 2011, Adjustment of pesticide concentrations for temporal changes in analytical recovery, 1992-2010: U.S. Geological Survey Data Series 630, 11 p., 5 app. Available Online

Price, C.V., Nakagaki, N., and Hitt, K.J., 2010, National Water-Quality Assessment (NAWQA) area-characterization toolbox, Release 1.0: U.S. Geological Survey Open-File Report 2010-1268 Available Online

Barbash, J.E., and Kolpin, D.W., 2010, "The use of data on transformation product occurrence to infer the sources, transport and fate of organic contaminants in the hydrologic system." Presented at the TransCon2010 conference in Ascona, Switzerland, September 13, 2010.

Nowell, L.H., Moran, P.W., Kemble, N.E., Ingersoll, C.G., and Kuivila, K.M., 2010, Distribution and toxicity of pesticides and other contaminants in stream sediments in relation to urbanization. American Chemical Society National Meeting, San Francisco CA, March 21-25, 2010. Abstract 209. Available Online

Ryberg, K.R., Vecchia, A.V., Martin, J.D., and Gilliom, R.J., 2010, Trends in pesticide concentrations in urban streams in the United States, 1992-2008: U.S. Geological Survey Scientific Investigations Report 2010-5139, 101 p. Available Online

Norman, J.E., and Kuivila, K.M., 2010, Prioritizing pesticide compounds for water quality assessment based on potential importance to human and ecological health, Seventh National Water Quality Monitoring Council Conference, Denver, CO, April 25-29, 2010. Session I6, p. 122. Available Online

Thelin, G.P. and Stone, W.W, 2010, Method for estimating annual atrazine use for counties in the conterminous United States, 1992-2007; U.S. Geological Survery Scientific Investigation Report 2010-5034, 129 p. Available Online

Toccalino, P.L. and J.A. Hopple, 2010, Quality of water from selected public-supply wells in the United States. Seventh National Monitoring Conference, Denver, CO, April 25-29, 2010. Session L6, p. 142. Available Online

Toccalino, P.L. and J.A. Hopple, 2010, Contaminants in groundwater sources used for public supply. Ground Water Protection Council annual forum, Pittsburgh, PA, September 26-29, 2010. Presentation at URL http://www.gwpc.org/sites/default/files/event-sessions/33Toccalino_Patty.pdf

Toccalino, P.L. and J.E. Norman, 2010, Contaminant mixtures in source water from public-supply wells in the United States. Society for Risk Analysis annual meeting, Salt Lake City, UT, December 5-8, 2010. Abstract T2-C2. Available Online

Toccalino, P.L., Norman, J.E., and Hitt, K.J., 2010, Quality of source water from public-supply wells in the United States, 1993-2007: U.S. Geological Survey Scientific Investigations Report 2010-5024, 206 p. Available Online

Toccalino, P.L., and Hopple, J.A., 2010, The quality of our Nation's waters - Quality of water from public-supply wells in the United States, 1993-2007- Overview of major findings: U.S. Geological Survey Circular 1346, 58 p. Available Online

Phillips, P.J., Nowell, L.H., Gilliom, R.J., Nakagaki, N., Murray, K.R., and VanAlstyne, C., 2010, Composition, distribution, and potential toxicity of organochlorine mixtures in bed sediments of streams. Sci Total Environ 408(3): 594-606. Available Online

Stone, W.W., and Gilliom, R.J., 2009, Update of Watershed Regressions for Pesticides (WARP) for predicting atrazine concentration in streams. 238th American Chemical Society National Meeting in Washington, DC, August 16-20. Abstract AGRO259. Available Online

Stone, W.W.,and Gilliom, R.J., 2009, Update of watershed regressions for pesticides (WARP) for predicting atrazine concentration in streams: U.S. Geological Survey Open-File Report 2009?1122, 22 p. Available Online

Sullivan, D.J., Vecchia, A.V., Lorenz, D.L., Gilliom, R.J., and Martin, J.D., 2009, Trends in pesticide concentrations in corn-belt streams, 1996?2006: U.S. Geological Survey Scientific Investigations Report 2009?5132, 76 p.

Vecchia, A.V., Gilliom, R.J., Sullivan, D.J., Lorenz, D.L. and Martin, J.D., 2009, Trends in concentration and use of agricultural herbicides for corn belt rivers, 1996-2006: Environmental Science & Technology, vol. 23, no. 24, p. 9096-9102.

Barbash, J.E., Capel, P.D., Hancock, T.C. and Rice, K., 2009, "Hierarchical approach for obtaining values of physical and chemical parameters controlling the transport and fate of pesticides and their transformation products in the hydrologic system." Presented at the 238th national meeting of the American Chemical Society, Washington, D.C., August 16-20, 2009. Available Online

Martin, J.D., Stone, W.W, Wydoski, D.S., and Sandstrom, M.W., 2009, Adjustment of pesticide concentrations for temporal changes in analytical recovery, 1992-2006: U.S. Geological Survey Scientific Investigations Report 2009-5189, 24 p. plus appendixes. Available Online

Martin, J.D., 2009, Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2006: U.S. Geological Survey Scientific Investigations Report 2009-5062, 41 p. plus appendixes. Available Online

Nowell, L.H., Crawford, C.G., Gilliom, R.J., Nakagaki, N., Stone, W.W., Thelin, G.P., and Wolock, D.W., 2009, Regression models for explaining and predicting concentrations of organochlorine pesticides in fish from United States streams. Environmental Toxicology and Chemistry, v. 28, n. 6, pp. 1346-1358. (Supporting Info) Available Online

Vecchia, A.V., Martin, J.D., and Gilliom, R.J., 2008, Modeling variability and trends in pesticide concentrations in streams: Journal of the American Water Resources Association, vol. 44, no. 5, p. 1,308-1,324.

Stone, W.W., Gilliom, R.J., and Crawford, C.G., 2008, Watershed Regressions for Pesticides (WARP) for Predicting Annual Maximum and Maximum Moving-Average Concentrations of Atrazine in Streams: U.S. Geological Survey Open-File Report 08-1186, 19 p. Available Online

Barbash, J.E., 2008, "Factors Controlling Groundwater Quality Across the United States - New Contributions from the National Water-Quality Assessment (NAWQA) Program." Presented at the Annual Meeting of the Geological Society of America, Houston, TX, October 5-9, 2008. Available Online

Stackelberg, P.E., Gilliom, R.J., Barbash, J.E., and Voss, F.D., 2008, "Regression Methods for Estimating the Occurrence of Atrazine in Shallow Ground Water beneath Agricultural Areas of the United States." Presented at the Annual Meeting of the Geological Society of America, Houston, TX, October 5-9, 2008. Available Online

Fox, G.A., Thelin, G.P., Sabbagh, G.J., Fuchs, J.W., and Kelly, I.S. Estimating watershed level nonagricultural pesticide use from golf courses using geospatial methods; Journal of the American Water Resources Association, v 44, no 6, p.1363-1372.

Capel, P. D., McCarthy, K. A. and Barbash, J. E., 2008. National, Holistic, Watershed-Scale Approach to Understand the Sources, Transport, and Fate of Agricultural Chemicals, J. Environ. Qual. 37(3): 983-993

Steele, G.V., Johnson, H.M., Sandstrom, M.W., Capel, P.D., and Barbash, J.E., 2008, Occurrence and Fate of Pesticides in Four Contrasting Ground-Water Flow Systems Agricultural Settings in the United States, J. Environ. Qual. 37(3): 1116-1132

Webb, R.M.T., Wieczorek, M.E., Nolan, B.T., Hancock, T.C., Sandstrom, M.W., Barbash, J.E., Bayless, E.R., Healy, R.W., and Linard, J.I., 2008, Variations in pesticide leaching related to land use and unsaturated zone thickness in an agricultural watershed in Maryland, J. Environ. Qual. 37(3): 1145-1157

Bayless, E.R., Capel, P.D. and Barbash, J.E., Webb, R.M.T., Hancock, T.C., and Lampe, D.C., 2008, Simulated Fate and Transport of Metolachlor in the Unsaturated Zone, Maryland, USA, J. Environ. Qual. 37(3): 1064-1072

Hancock, T.C., Sandstrom, M.W., Vogel, J.R., Webb, R.M.T., Bayless, E.R. and Barbash, J.E., 2008, Transport and Fate of Pesticides in the Unsaturated Zone within Five Agricultural Settings of the United States, J. Environ. Qual. 37(3): 1086-1100

Toccalino, P.L. and Norman, J.E., 2008, National reconnaissance of the chemical quality of water from public-supply wells. Proceedings of the annual Society for Risk Analysis Meeting, Boston, MA. December 7-10, 2008. Paper M4-F.1, p. 142. Available Online

Wilson, J.T., Baker, N.T., Moran, M.J., Crawford, C.G., Nowell, L.H., Toccalino, P.L., and Wilber, W.G., 2008, Methods and sources of data used to develop selected water-quality indicators for streams and ground water for the 2007 edition of The State of the Nation's Ecosystems report with comparisons to the 2002 edition: U.S. Geological Survey Open-File Report 2008-1110, 62 p. Available Online

Sprague, L.A. and Nowell, L.H., 2008, Comparison of pesticide concentrations in streams at low flow in six metropolitan areas of the United States: Environmental Toxicology and Chemistry, Vol. 27, No. 2, pp. 288-298 Available Online

Stone, W.W., Crawford, C.G., and Gilliom, R.J., 2007, Estimating pesticide concentrations in U.S. streams from watershed characteristics and pesticide properties. 233rd American Chemical Society National Meeting in Chicago, IL, March 25-29. Abstract AGRO140. Available Online

Price, C.V.; Nakagaki, N.; Hitt, K.J.; and Clawges, R.M., 2007, Enhanced historical land-use and land-cover data sets of the U.S. Geological Survey: U.S. Geological Survey Data Series 240 Available Online

Tesoriero, A.J., Saad, D.A., Burow, K.R., Frick, E.A., Puckett, L.J. and Barbash, J.E., 2007, Linking ground-water age and chemistry data along flow paths: Implications for trends and transformations of nitrate and pesticides. J.Cont.Hydrol. 94: 139-155 Available Online

Toccalino, P.L. and Norman, J.E., 2007, Development and application of health-based screening levels for water-quality assessments. 26th Biennial Groundwater Conference & 16th Groundwater Resources Association Annual Meeting, Sacramento, CA, September 18-19, 2007. Abstract p. 32.

Toccalino, P.L., 2007, Use of health-based screening levels and other benchmarks for interpreting water-quality data. 2007 USGS National Water-Quality Workshop, Galveston, TX, November 5-9, 2007.

Metz, P.A., Delzer, G.C., Berndt, M.P., Crandall, C.A., and Toccalino, P.L., 2007, Anthropogenic organic compounds in ground water and finished water of community water systems in the northern Tampa Bay area, Florida, 2002-04: U.S. Geological Survey Scientific Investigations Report 2006-5267, 48 p. Available Online

Toccalino, P.L., 2007, Development and application of health-based screening levels for use in water-quality assessments: U.S. Geological Survey Scientific Investigations Report 2007-5106, 12 p. Available Online

Norman, J.E., Valder, J.F., and Toccalino, P.L., 2007, Development and Application of Health-Based Screening Levels for National Water-Quality Assessments [abs.]: New England Private Well Water Symposium, 3-4 December 2007, Newport, RI. Available Online

J.B. Belden,, R.J. Gilliom, and M.J. Lydy, 2007, How well can we predict the toxicity of pesticide mixtures to aquatic life? Integrated Environmental Assessment and Management, v., n., pp. Available Online

Barbash, J.E., 2007, The geochemistry of pesticides. In: Environmental Geochemistry (ed. B. S. Lollar), Volume 9 of Treatise on Geochemistry (eds. H.D.Holland and K.K. Turekian), Elsevier—Pergamon, Oxford, UK, on-line edition, 43 p. Available Online

Robert J. Gilliom, 2007, Pesticides in the Nation's Streams and Ground Water; Environmental Science and Technology, v. 41, n.10, pp. 3408–3414 Available Online

Gilliom, R.J., Zogorski, J.S., Delzer, G.C., Focazio, M.J., and Toccalino, P.L., 2007, Occurrence and Potential Human-Health Significance of Synthetic Organic Contaminants in Sources of Drinking Water [abs.]: 233rd American Chemical Society National Meeting, 25-29 March 2007, Chicago, IL, abstract no. SUST 18. Available Online

Stackelberg, P., Gilliom, R., Wolock, D., and Nakagaki, N., 2007, Modeling atrazine occurrence in shallow ground water in agricultural areas of the United States. American Chemical Society, 233rd National Meeting, March 25-29, 2007, Chicago, IL., Available Online

Barbash, J.E., and Voss, F.D., 2007, Use of a geographic information system with process-based simulation modeling to predict atrazine concentrations in shallow ground water across the United States: Simulation approach and testing against nationwide observations: American Chemical Society national meeting, Chicago, IL, March 27, 2007 Available Online

Sprague, L.A., Harned, D.A., Hall, D.W., Nowell, L.H., Bauch, N.J., and Richards, K.D., 2007, Response of stream chemistry during base flow to gradients of urbanization in selected locations across the conterminous United States: Scientific Investigations Report 2007-5083. Available Online

Nowell, L.H; Crawford, C.G.; Nakagaki, N.; Thelin, G.P.; Wolock, D.M., 2007, Regression models for explaining and predicting organochlorine pesticide concentrations in whole fish from U.S. streams: American Chemical Society, 233rd National Meeting & Exposition, 25-29 March 2007, Chicago, IL, abstract no. 145. Available Online

J.B. Belden, R.J. Gilliom, J.D. Martin, and M.J. Lydy, 2007, Relative toxicity and occurrence patterns of pesticide mixtures in streams draining agricultural watersheds dominated by corn and soybean production: Integrated Environmental Assessment and Management, v.3, n.1, pp. 90-100 Available Online

Gilliom, R.J., Barbash, J.E., Crawford, C.G., Hamilton, P.A., Martin, J.D., Nakagaki, N., Nowell, L., Scott, J.C., Stackelberg, P.E., Thelin, G.P., Wolock, D.M., 2006, Pesticides in the Nation's Streams and Ground Water, 1992-2001: U.S. Geological Survey Circular 1291 Available Online

Toccalino, P.L., Norman, J.E., Booth, N.L., and Zogorski, J.S., 2006, Health-Based Screening Levels: A Tool for Evaluating what Water-Quality Data May Mean to Human Health: U.S. Geological Survey, National Water-Quality Assessment Program Available Online

Munn, M.D., Gilliom, R.J., Moran, P.W., and Nowell, L.H., 2006, Pesticide toxicity index for freshwater aquatic organisms, 2nd Edition: U.S. Geological Survey Scientific Investigations Report 2006-5148, 81 p. Available Online

Toccalino, P.L., 2006, National Synthesis - A Critical Component of National Assessments: Contaminants in the Nation's Drinking-Water Supply Wells [abs.]: TRACKS 2006: Implementing the Tracking Network, Third National Conference on CDC's National Environmental Public Health Tracking Program, 9-11 August 2006, Atlanta, GA, abstract no. 10. Available Online

Robert J. Gilliom, Jack E. Barbash, Charles G. Crawford, Pixie A. Hamilton, Jeffrey D. Martin, Naomi Nakagaki, Lisa H. Nowell, Jonathon C. Scott, Paul E. Stackelberg, Gail P. Thelin, David M. Wolock, 2006, Pesticides in the nation's streams and ground water, 1992-2001[abs.]: 5th National Monitoring Conference, San Jose, CA, May 7-11, 2006.

Robert J. Gilliom, and Pixie A. Hamilton, Pesticides in the Nation's streams and ground water, 1992-2001--A summary; U.S. Geological Survey Fact Sheet 2006-3028 Available Online

Martin, J.D., 2006, Pesticides in the Nation's streams and ground water, 1992-2001 [abs.], Proceedings of the 27th annual water resources symposium “Energizing Indiana’s Water Community,” June 21-23, 2006, Purdue University, West Lafayette, Indiana: Indiana Water Resources Association, p. 18.

Gilliom, Robert J.; Hamilton, Pixie A., 2006, Pesticides in the nation's streams and ground water, 1992-2001 - a summary: U.S. Geological Survey Fact Sheet 2006-3028 Available Online

Stackelberg, P.E., Gilliom, R.J., Wolock, D.M., and Nakagaki, N., 2006, Predicting the occurrence of atrazine in shallow ground water beneath agricultural areas of the United States. Geological Society of America Annual Meeting, October 22-25 2006, Philadelphia, PA. Available Online

Stackelberg, P.E., Gilliom, R.J., Wolock, D.M., and Hitt, K.J., 2006. Development and application of a regression equation for estimating the occurrence of atrazine in shallow ground water beneath agricultural areas of the United States. U.S. Geological Survey, Scientific Investigations Report 2005-5287, 12 p. Available Online

Stackelberg, P.E., Gilliom, R.J., Wolock, D.M., and Hitt, K.J., 2006, Development and Application of a Regression Model for Estimating the Occurrence of Atrazine in Shallow Ground Water beneath Agricultural Areas of the United States. National Water Quality Monitoring Council, 206 National Monitoring Conference, May 7-11 2006, San Jose, CA. Available Online

Barbash, J.E., 2006, Proposed tools and approach for ground-water vulnerability assessment (GWAVA) using a geographic information system and simulation modeling (Invited presentation, delivered at the National Water-Quality Monitoring Council's 5th National Monitoring Conference, San Jose, CA, May 8, 2006). Available Online

Vecchia, A.V., and Crawford, C.G., 2006, Simulation of daily pesticide concentrations from watershed characteristics and monthly climatic data: U.S. Geological Survey Scientific Investigations Report 2006-5181, 60 p. Available Online

Nowell, L.H; Crawford, C.G.; Nakagaki, N.; Thelin, G.P.; Wolock, D.M., 2006, Regression models for explaining and predicting concentrations of organochlorine pesticides in whole fish from U.S. streams: National Water Quality Monitoring Council, 2006 National Monitoring Conference, May 7–11 2006, San Jose, CA, abstract no. 073. Available Online

Nowell, L.H; Crawford, C.G.; Nakagaki, N.; Thelin, G.P.; Wolock, D.M., 2006, Regression model for explaining and predicting concentrations of dieldrin in whole fish from United States streams: U.S. Geological Survey Scientific Investigations Report 2006-5020. Available Online

Martin, J.D., 2006, Pesticides in the Nation's streams, 1992-2001 [abs.], Final Program of the 26th International Symposium of the North American Lake Management Society, November 8-10, 2006, Crowne Plaza & Union Station Conference Center, Indianapolis, Indiana: North American Lake Management Society, p. 53. Available Online

Crawford, C.G. and Gilliom, R.J., 2006, Estimating pesticide concentrations in U.S. streams from watershed characteristics and pesticide properties [abs.]: National Water Quality Monitoring Council Abstracts of papers, Fifth National Monitoring Conference, 7-11 May 2006, San Jose, CA, abstract no. 65, p. 395.

Nolan, B.T., Bayless, E.R., Green, C.T., Garg, S., Voss, F.D., Lampe, D.C., Barbash, J.E., Capel, P.D. and Bekins, B.A., 2005, Evaluation of unsaturated-zone solute-transport models for studies of agricultural chemicals: U.S.Geological Survey Open-File Report 2005-1196, 16 p. Available Online

Nakagaki, Naomi, and Wolock, D.M., 2005, Estimation of agricultural pesticide use in drainage basins using land cover maps and county pesticide data: U.S. Geological Survey Open-File Report 2005-1188, 46 p. Available Online

Toccalino, P.L., Zogorski, J.S., and Norman, J.E., 2005, Health-Based Screening Levels and Their Application to Water-Quality Data: U.S. Geological Survey Fact Sheet 2005-3059, 2 p. Available Online

Nowell, L.H. and Stephens, V.C., 2005, Contaminant mixtures in bed sediment from U.S. streams, and their potential toxicity to aquatic life: Society of Toxicology, Contemporary Concepts in Toxicology Workshop on Charting the Future: Building the Scientific Foundation for Mixtures Joint Toxicity and Risk Assessment, 16–17 February 2005, Atlanta, Georgia. Available Online

Crawford, C.G., 2004, Sampling Strategies for Estimating Acute and Chronic Exposures of Pesticides in Streams: Journal of the American Water Resources Association, v. 40, No. 2, p. 485-502.

Toccalino, P.L., Norman, J.E., Kauffman, L.J., Nowell, L.H., and Stackelberg, P.E., 2004, Assessing the Occurrence of Pesticides and VOCs in Ground Water in a Human-Health Context [abs.]: Society of Environmental Toxicology and Chemistry, 13th Annual Meeting of the Pacific Northwest Chapter, 15-17 April 2004, Port Townsend, WA. Available Online

Toccalino, P.L., Norman, J.E., Phillips, R.H., Kauffman, L.J., Stackelberg, P.E., Nowell, L.H., Krietzman, S.J., and Post. G.B., 2004, Application of Health-Based Screening Levels to Ground-Water Quality Data in a State-Scale Pilot Effort: U.S. Geological Survey Scientific Investigations Report SIR 2004-5174, 64 p. Available Online

Robert J. Gilliom, and Jeffrey D. Martin, 2004, The prevalence of pesticide mixtures in U.S. streams; Abstract Available Online

Nowell, L.H. and Stephens, V.C., 2004, Contaminant mixtures in bed sediment from U.S. streams, and their potential toxicity to aquatic life [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, 4th World Congress and 25th Annual Meeting in North America, 14 - 18 November 2004. Portland, Oregon, abstract no. PH246, p. 468-469.

Martin, J.D., Gilliom, R.J., and Crawford, C.G., 2004, Pesticides in rivers and streams of the United States: A summary of results from the first 10 years of the U.S. Geological Survey National Water-Quality Assessment program [abs.], Program & Abstracts of the Ninth Symposium on the Chemistry & Fate of Modern Pesticides, August 16-19, 2004, Vail Marriott Mountain Resort, Vail, Colorado: International Association of Environmental Analytical Chemistry, abstract no. 4, p. 19. Available Online

Larson, S.J., Crawford, C.G., and Gilliom, R.J., 2004, Development and Application of Watershed Regressions for Pesticides (WARP) for Estimating Atrazine Concentration Distributions in Streams: U.S. Geological Survey Water-Resources Investigations Report 03-4037, 68 p. Available Online

Crawford, C.G. and Gilliom, R.J., 2004, Estimating pesticide concentrations in U.S. streams from watershed characteristics and pesticide properties [abs]: American Chemical Society Abstracts of papers, 228th National Meeting, August 22-26 2004, Philadelphia, PA, abstract no. AGRO 140. Available Online

Toccalino, P.L., Stackelberg, P.E., Kauffman, L.J., Nowell, L.H., Krietzman, S.J., and Post, G.B., 2003, Application of Health-Based Screening Levels to Ground-Water Quality Data in a State-Scale Pilot Effort [abs.]: USGS Public Health Conference: Natural Science and Public Health - Prescription for a Better Environment, 1-3 April 2003, Reston, VA, U.S. Geological Survey Open-File Report 03-097, p. 27. Available Online

Toccalino, P.L., Nowell, L.H., Wilber, W.G., Zogorski, J.S., Donohue, J.M., Eiden, C.A., Krietzman, S.J., and Post, G.B., 2003, Development of Health-Based Screening Levels for Use in State- or Local-Scale Water-Quality Assessments: U.S. Geological Survey Water Resources Investigations Report WRIR 03-4054, 22 p. Available Online

Martin, J.D., 2002, Variability of pesticide detections and concentrations in field replicate water samples collected for the National Water-Quality Assessment program, 1992-97: U.S. Geological Survey Water-Resources Investigations Report 01-4178, 84 p. Available Online

Martin, J.D., 2002, Use of field quality-control samples in determining the quality of pesticide data collected for the NAWQA program [abs.], Proceedings of the 3rd National Monitoring Conference “Building a Framework for the Future,” May 20-23, 2002, Monona Terrace Convention Center, Madison, Wisconsin: National Water Quality Monitoring Council.

Martin, J.D., 2002, Examples of the use of field QC samples in water-quality assessments [abs.], Proceedings of the 23rd annual water resources symposium “Water Quality and Water Rights in the Midwest: Converging Regulation, Technology, and Demand,” June 19-21, 2002, Pokagon State Park, Angola, Indiana: Indiana Water Resources Association.

Toccalino, P.L., Nowell, L.H., Ayers, M.A., Donohue, J.M., Krietzman, S.J., and Post, G.B., 2002, Communicating U.S. Geological Survey Water-Quality Data Using Health-Based Screening Levels [abs.]: National Water Quality Monitoring Council, National Monitoring Conference Proceedings, 20-23 May 2002, Madison, WI, abstract no. 165. Available Online

Phillips, R.H., Norman, J.E., O'Brien, I., and Toccalino, P.L., 2002, A Toxicity Database as a Tool for Water-Quality Evaluations [abs.]: Society of Environmental Toxicology and Chemistry, 11th Annual Meeting of the Pacific Northwest Chapter, 16-18 May 2002, Portland, OR. Available Online

Kolpin, D.W., Barbash, J.E. and Gilliom, R.J. 2002. Atrazine and metolachlor occurrence in shallow groundwater of the United States, 1993-95: Relations to explanatory factors. J.Am.Wat.Resour.Assn. 38(1): 301-311. Available Online

Crawford, C.G., Larson, S.J., and Gilliom, R.J., 2002, Using watershed characteristics to estimate pesticide concentrations in U.S. streams [abs.]: Society for Occupational and Environmental Health Abstracts of papers, International Conference on Pesticide Exposure and Health, 8-12 July 2002, Bethesda, MD, abstract no. 47, p. 39.

Crawford, C.G., Larson, S.J., and Gilliom, R.J., 2002, Estimating pesticide concentrations in United States streams from nationally available watershed characteristics [abs.]: International Union of Pure and Applied Chemistry Book of abstracts, 10th International Congress on the Chemistry of Crop Protection, 4-9 August 2002, Basel, Switzerland, abstract no. 5d.05, p. 159. (file name: iupac.2002

Toccalino, P., Nowell, L., Ayers, M., Post, G., Krietzman, S., and Donohue, J., 2001, Development of Health-Based Screening Levels for USGS Water-Quality Data: The Association of State Drinking Water Administrators, 16th Annual Conference, 23-26 October, 2001, Baltimore, Maryland. Abstract: Available Online

Pixie A. Hamilton, Robert J. Gilliom, and Timothy L. Miller, 2001, The National Water-Quality Assessment Program; U.S. Geological Survey Fact Sheet 071-01 Available Online

Gilliom, R. J.; Hamilton, P. A.; Miller, T. L., 2001, The National Water-Quality Assessment Program; entering a new decade of investigations: U.S. Geological Survey Fact Sheet 071-01 Available Online

Munn, M.J., and Gilliom, R.J., 2001, Pesticide toxicity index for freshwater aquatic organisms: U.S. Geological Survey Water Resources Investigations Report 01-4077 Available Online

Gilliom, R.J., 2001, Pesticides in the hydrologic system--what do we know and what's next?: Hydrological Processes, v. 15, issue 16, p.3197-3201 Available Online

Barbash, J.E., Thelin, G.P., Kolpin, D.W., and Gilliom, R.J., 2001, Major herbicides in ground water: results from the National Water-Quality Assessment: Journal of Environmental Quality, v. 30, no. 3, pp. 831-845. Available Online

Wong, C.S., Capel, P.D., and Nowell, L.H., 2001, National-Scale, Field-Based Evaluation of the Biota-Sediment Accumulation Factor Model: Environmental Science and Technology, v. 35, n. 9, p. 1709-1715. Available Online

Wolock, D.M., Gilliom, R.J., and Larson, S.J., 2001, Estimating the effects of basin characteristics on stream pesticide concentrations using coupled watershed and regression models [abs.]: EOS Transactions, v. 82, no. 47, Fall Meeting Supplement, Abstract H21E-06, 1 p. Available Online

Thurman, E.M., Zimmerman, L.R., Aga, D.S., and Gilliom, R.J., 2001, Regional water-quality analysis of 2,4-D and dicamba in river water using gas chromatography-isotope dilution mass spectrometry: International Journal of Environmental Analytical Chemistry, v. 79, no. 3, p. 185-198. Available Online

Larson, S.J., Gilliom, R.J., and Crawford, C.G., 2001, Regression models for predicting pesticide concentrations in U.S. streams [abs.], in Warwick, J.J., ed., Water quality monitoring and modeling: Proceedings, American Water Resources Association, AWRA, Annual Spring Specialty Conference, April 30-May 2, 2001, San Antonio, Texas: Middleburg, Va., American Water Resources Association, p. 41-46.

Larson, S.J., and Gilliom, R.J., 2001, Regression models for estimating herbicide concentrations in U.S. streams from watershed characteristics: Journal of the American Water Resources Association, v. 37, no. 5, p. 1349-1367.

Capel, P.D., Larson, S.J., and Winterstein, T.A., 2001, The behavior of 39 pesticides in surface waters as a function of scale: Hydrological Processes, v. 15, issue 7, p. 1251-1269. Available Online

Capel, P.D., Larson, S.J., 2001, Effect of scale on the behavior of atrazine in surface waters: Environmental Science and Technology, v. 35, no. 4, p. 648-657. Available Online

Martin, J.D., 2000, Use of field and laboratory quality-control samples in determining the quality of pesticide data collected for the USGS NAWQA program [abs.], Proceedings of the 21st annual water resources symposium “Improving and Protecting Water Quality: Assessment, Regulation and Policy,” June 14-16, 2000, Spring Mill State Park, Mitchell, Indiana: Indiana Water Resources Association.

Thelin, G.P., Gianessi, L.P., 2000, OFR 00-250 Method for Estimating Pesticide Use for County Areas of the Conterminous United States. U.S. Geological Survey Open-File Report 00-250, 62 p. Available Online

Kolpin, D.W., Barbash, J.E. and Gilliom, R.J. 2000. Pesticides in ground water of the United States, 1992-1996. Ground Water, 38(6): 858-863. Available Online

Wong, C.S., Capel, P.D., and Nowell, L.H., 2000, Organochlorine Pesticides and PCBs in Stream Sediment and Aquatic Biota-- Initial Results from the National Water-Quality Assessment Program, 1992-1995: U.S. Geological Survey Water-Resources Investigations Report 00-4053, Sacramento, CA, 88 p. Available Online

Nowell, L.H., P.D. Capel and P.D. Dileanis, 2000, Pesticides in Stream Sediment and Aquatic Biota: Current Understanding of Distribution and Major Influences. U.S. Geological Survey Fact Sheet 092-00 Available Online

Martin, J.D., 1999, Quality of pesticide data for environmental water samples collected for the National Water-Quality Assessment Program, 1992-96 and examples of the use of quality-control information in water-quality assessments: Available Online

U.S. Geological Survey, 1999, The quality of our Nation's waters--Nutrients and pesticides: U.S. Geological Survey Circular 1225, 82 p. Available Online

Martin, J.D., Gilliom, R.J., and Schertz, T.J., 1999, Summary and Evaluation of Pesticides in Field Blanks Collected for the National Water-Quality Assessment Program: 1992-1995: U.S. Geological Survey Open-File Report 98-412, 102 p. Available Online

Burkart, M.R., Kolpin, D.W., Jaquis, R.J., and Cole, K.J., 1999, Agrichemicals in ground water of the midwestern USA: Relations to soil characteristics: Journal of Environmental Quality, v. 28, n. 6, p. 1908-1915. Available Online

Burkart, M.R., Kolpin, D.W., and James, D.E., 1999, Assessing groundwater vulnerability to agrichemical contamination in the Midwest US: Water Science & Technology, v. 39, n. 3, p. 103-112. Available Online

Barbash, J.E., Thelin, G.P., Kolpin, D.W., and Gilliom, R.J., 1999, Distribution of Major Herbicides in Ground Water of the United States U.S. Geological Survey Water-Resources Investigations Report 98-4245. Available Online

Wong, C.S., Garrison, AW., Foreman, W.T., Capel, P.D., and Nowell, L.H.., 1999, Enantiomeric occurrence and distribution of chiral organochlorine compounds in U.S. river sediment and biota: American Chemical Society, 218th National Meeting, 22-26August, 1999, New Orleans, LA. Available Online

Nowell, L.H., Capel, P.D., and Dileanis, P.D., 1999, Pesticides in stream sediment and aquatic biota-Distribution, trends, and governing factors: Boca Raton, Fla., CRC Press, Pesticides in the Hydrologic System series, v. 4, 1040 p. Available Online

Larson, S.J., Gilliom, R.J., and Capel, P.D., 1999, Pesticides in Streams of the United States--Initial Results from the National Water-Quality Assessment Program U.S. Geological Survey Water-Resources Investigations Report 98-4222, 92 p. Available Online

Gilliom,R.J., Mueller, D.K., and Nowell, L.H., 1998, Methods for Comparing Water-Quality Conditions Among National Water-Quality Assessment Study Units, 1992-1995: U.S. Geological Survey Open-File Report 97-589, 54 p. Available Online

Nowell, L.H., 1998, Development of Water-Quality Standards and Guidelines for Pesticides and Their Use in Water-Quality Assessments [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, South-Central/Ozark Prairie Regional Meeting, 20-22 April 1998. Available Online

Kolpin, D.W., Thurman, E.M., and Linhart, S.M., 1998, The Environmental Occurrence of Herbicides: The Importance of Degradates in Ground Water: Archives of Environmental Contamination and Toxicology, v. 35, p. 385-390. Available Online

Kolpin, D.W., Barbash, J.E., and Gilliom, R.J., 1998, Occurrence of Pesticides in Shallow Groundwater of the United States: Initial Results from the National Water-Quality Assessment Program: Environmental Science & Technology, v. 32, n. 5, p. 558-566 . Adapted from original article published in the Environmental Science & Technology, v. 32, 1998. Available Online

Wong, C.S., Capel, P.D., and Nowell, L.H., 1998, National-Scale Field-Based Evaluation of the Applicability of Biota Sediment Accumulation Factors (BSAF) [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, Eighteenth Annual Meeting, 16-20 November 1997, San Francisco, CA, abstract no. 147, p 29-30. Available Online

Wong, C.S., Capel, P.D., and Nowell, L.H., 1998, National Occurrence and Distribution of Chlorinated Organic Compounds in Stream Bed Sediments and Biota [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, Eighteenth Annual Meeting, 16-20 November 1997, San Francisco, CA, abstract no. PMP026, p.127. Available Online

Majewski, M.S., Foreman, W.T., Goolsby, D.A., and Nakagaki, N., 1998, Airborne Pesticide Residues along the Mississippi River: Environmental Science and Technology, v. 32, no. 23, p. 3689-3698. Available Online

Majewski, M.S., 1997, Error Evaluation of Methyl Bromide Aerodynamic Flux Measurements, chap. 12 in Seiber, J.N., and others, eds, Fumigants -- Environmental Fate, Exposure, and Analysis: ACS Symposium Series, v. 652, p. 135-153.

Shelton, L.R., 1997, Field Guide for Collecting Samples for Analysis of Volatile Organic Compounds in Stream Water for the National Water-Quality Assessment Program: U.S. Geological Survey Open-File Report 97-401, 14 p. Available Online

Mueller, D.K., Martin, J.D., and Lopes, T.J., 1997, Quality-Control Design for Surface Water Sampling in the National Water-Quality Assessment Program: U.S. Geological Survey Open File Report 97-223, 17 p. Available Online

Gilliom, Robert J.; Thelin, Gail P., 1997 Classification and mapping of agricultural land for National Water-Quality Assessment: U.S. Geological Survey Circular 1131, Available Online

Liu, S., Lu, J., Kolpin, D.W., and Meeker, W.Q., 1997, Analysis of Environmental Data with Censored Observations: Environmental Science & Technology, v. 31, n. 12, p. 3358-3362. Available Online

Kolpin, D.W., Squillace, P.J., Zogorski, J.S., and Barbash, J.E., 1997, Pesticides and volatile organic compounds in shallow urban groundwater of the United States, in Groundwater in the Urban Environment (Chilton, J., ed.) The Netherlands: A.A. Balkema, p. 469-474. Available Online

Kolpin, D.W., Kalkhoff, S.J., Goolsby, D.A., Sneck-Fahrer, D.A., and Thurman, E.M. 1997, Occurrence of Selected Herbicides and Herbicide Degradation Products in Iowa's Ground Water, 1995: Ground Water, v. 35, n. 4, p. 679-688. Available Online

Kolpin, D.A., Hallberg, G.R., and Libra, R.D. 1997, Temporal Trends of Selected Agricultural Chemicals in Iowa's Groundwater, 1982-1995: Are things getting better?: Journal of Environmental Quality, v. 26, n. 4, p. 1007-1017. Available Online

Larson, S.J., Gilliom, R.J., and Capel, P.D., 1997, Pesticides in Surface Waters: Current Understanding of Distribution and Major Influences. U.S. Geological Survey Fact Sheet FS-039-97, 4p. Available Online

Larson, S.J., Capel, P.D., and Majewski, M.S., 1997, Pesticides in Surface Waters: Distribution, Trends, and Governing Factors: Chelsea, Mich., Ann Arbor Press, 390 p.

Goodbred, Steven L.; Gilliom, Robert J.; Gross, Timothy S.; Denslow, Nancy P.; Bryant, Wade B.; Schoeb, Trenton R., 1996, Reconnaissance of 17 beta-estradiol, 11-ketotestosterone, vitellogenin, and gonad histopathology in common carp of United States streams; potential for contaminant-induced endocrine disruption: U.S. Geological Survey Open-File Report 96-627, Available Online

Capel, P.D., Larson, S.J., 1996, Evaluation of Selected Information on Splitting Devices for Water Samples: U.S. Geological Survey Water Resources Investigation Report 95-4141, 112 p.

Kolpin, D.W., Nations, B.K., Goolsby, D.A., and Thurman, E.M., 1996. Acetochlor in the Hydrologic System in the Midwestern United States, 1994: Environmental Science & Technology, v. 30, no. 5, p. 1459-1464. Available Online

Barbash, J.E. and Resek, E.A., 1996, Pesticides in Ground Water: Distribution, Trends, and Governing Factors. Chelsea, Michigan: Ann Arbor Press, Pesticides in the Hydrologic System series, v. 2, 590 p.

Majewski, M.S., Woodrow, J.E., and Seiber, J.N., 1995, Methyl Bromide Volatility Measurements from Treated Fields [abs.]: American Chemical Society Abstracts of papers, 210th National Meeting, 20-24 August 1995, Chicago, Ill., abstract no. 90, unnumbered pages. Available Online

Majewski, M.S., McChesney, M.M., Woodrow, J.E., Prueger, J.H., Seiber, J.N., 1995, Aerodynamic Measurements of Methyl Bromide Volatilization from Tarped and Nontarped Fields: J. Environ. Qual., v. 24, no. 4, p. 742-752. Available Online

Gilliom, R.J., Alley, W.M., and Gurtz, M.E., 1995, Design of the National Water-Quality Assessment Program: Occurrence and Distribution of Water-Quality Conditions: U.S. Geological Survey Circular 1112, 33 p. Available Online

Capel, P.D., Nacionales, F.C., and Larson, S.J., 1995, Precision of a Splitting Device for Water Samples: U.S. Geological Survey Open-File Report 95-293, 10 p. Available Online

Capel, P.D., and Larson, S.J., 1995, A Chemodynamic Approach for Estimating Losses of Target Organic Chemicals from Water During Sample Holding Time: Chemosphere, v. 30, no. 6, p. 1097-1107. Available Online

Capel, P.D., Ma, Lin, Schroyer, B.R., Larson, S.J., and Gilchrist, T.A., 1995, Analysis and Detection of the New Corn Herbicide Acetochlor in River Water and Rain: Environmental Science and Technology, v. 29, no. 6, p. 1702-1705.

Barbash, J.E., 1995, Pesticides in Ground Water: Current Understanding of Distribution and Major Influences. U.S. Geological Survey Fact Sheet FS-244-95, 4 p. Available Online

Barbash, J.E., 1995, Pesticides in Ground Water: An Overview of Current Understanding [abs.]: American Geophysical Union Spring Meeting, The Rubin Symposium on Soil Science, Solute Transport, and National-Scale Water Quality Assessments, 1 June 1995, Baltimore, Maryland, EOS, v. 76, no. 17, p. S142. Available Online

Nowell, L.H., Dileanis, P.D., and Capel, P.D., 1995, Pesticides in Sediments and Aquatic Biota of United States rivers: Occurrence, Geographic Distribution, and Trends [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, Second SETAC World Congress, 5-9 November 1995, Vancouver, B.C., abstract no. PT267, p. 218. Available Online

Larson, S.J., Capel, P.D., Goolsby, D.A., Zaugg, S.D., and Sandstrom, M.W., 1995, Relations Between Pesticide Use and Riverine Flux in the Mississippi River Basin: Chemosphere, v. 31, no. 5, p. 3305-3321. Available Online

Larson, S.J., Capel, P.D., 1995, Pesticides in Surface Waters of the United States: A Review of Occurrence and Geographic Distribution [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, Second SETAC World Congress, 5-9 November 1995, Vancouver, B.C., abstract no. PM262, p. 156. Available Online

Goodbred, S., Gilliom, R.J., and Gross, T., 1995, Reconnaissance of 17B-estradiol and 11-ketotestosterone Levels in Fish of United States Streams [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, Second SETAC World Congress, 5-9 November 1995, Vancouver, B.C., abstract no. 322, p. 60. Available Online

Gilliom, R.J., 1995, Pesticides in Agriculture and Urban Streams of the United States [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, Second SETAC World Congress, 5-9 November 1995, Vancouver, B.C., abstract no. PM259, p. 155. Available Online

Majewski, M.S., Foreman, W.T., Goolsby, D.A., 1995, Airborne Pesticide Residues Along the Mississippi River [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, Second SETAC World Congress, 5-9 November 1995, Vancouver, B.C., abstract no. 167, p. 31. Available Online

Majewski, M.S., and Capel, P.D., 1995, Pesticides in the Atmosphere of the United States: A Review of Occurrence and Geographic Distribution [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, Second SETAC World Congress, 5-9 November 1995, Vancouver, B.C., abstract no. PM263, p. 156. Available Online

Majewski, M.S., and Capel, P.D., 1995, Pesticides in the Atmosphere -- Distribution, Trends, and Governing Factors: Ann Arbor Press, Chelsea, Michigan, 228 p

Majewski, M.S., 1995, Pesticides in the Atmosphere: Current Understanding of Distribution and Major Influences. U.S. Geological Survey Fact Sheet FS-152-95, 4 p. Available Online

Foreman, W.T., Goolsby, D.A., Majewski, M.S., Nations, B.K., Coupe, R.H., Larson, W.W., Battaglin, W.A., 1995, Pesticides in Air and Rain at Urban and Agricultural Sites in the Midwestern United States [abs.]: Society of Environmental Toxicology and Chemistry Abstracts Book, Second SETAC World Congress, 5-9 November 1995, Vancouver, B.C., abstract no. PM 260, p. 156. Available Online

Shelton, L.R., and Capel, P.D., 1994, Guidelines for Collecting and Processing Samples of Stream Bed Sediment for Analysis of Trace Elements and Organic Contaminants for the National Water- Quality Assessment Program: U.S. Geological Survey Open-File Report 94-458, 20 p. Available Online

Shelton, L.R., 1994, Field Guide for Collecting and Processing Stream-Water Samples for the National Water-Quality Assessment Program: U.S. Geological Survey Open-File Report 94-455, 50 p. Available Online

Gilliom, R.J., 1994, National Study Design for Assessing Pesticides in Streams and Ground Water, in Sorenson, S.K., ed., Proceedings Abstracts of the American Water Resources Association's Symposium on the National Water-Quality Assessment (NAWQA) Program - 7-9 November 1994, Chicago, Ill.: U.S. Geological Survey Open-File Report 94-397, p. 8. Available Online

Nowell, L.H., and Resek, E.A., 1994, National Standards and Guidelines for Pesticides in Water, Sediment, and Aquatic Organisms: Application to Water-Quality Assessments: in Ware, G.W., ed., Reviews of Environmental Contamination and Toxicology, v. 140, New York: Springer-Verlag, p. 1-164.

Barbash, J.E., 1994, Problems Associated with the Use of Solute-Transport Models and Vulnerability Assessments for Predicting the Behavior of Pesticides in the Subsurface [abs.]: American Chemical Society Abstracts of Papers, 208th National Meeting, Part 1, 22 August 1994, Washington, D.C. Available Online

Majewski, M.S., 1994, Pesticides in the Atmosphere in U.S. Geological Survey Earth Science in the Public Service 1994: U.S. Geological Survey, p. 48-51. [U.S. Geological Survey Yearbook, fiscal year 1994]

Capel, P.D., 1993, Organic Chemical Concepts, Chapter 7 in Alley, W.M., ed., Regional ground-water quality: New York, Van Nostrand Reinhold, p. 155-179.

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