National Water-Quality Assessment (NAWQA) Program
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Full List of Publications (back to categories)
Norman, J.E, Kuivila, K.M., and Nowell, L.H., 2011, Prioritizing Pesticide Compounds for Analytical Methods Development: U.S. Geological Survey Scientific Investigations Report 2011-xxxx, xx p. plus appendixes. (report in progress).
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
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
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
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
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 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. 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. Abstract and presentation at URL http://www.gwpc.org/meetings/forum/2010/proceedings/Proceedings.pdf and http://www.gwpc.org/meetings/forum/2010/proceedings/33Toccalino_Patty.pdf
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
Thelin, G.P. and Stone, W.W, 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
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
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
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
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
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
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
Spraque, 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
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
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
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
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
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
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
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
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.
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
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
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
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
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
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
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
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
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
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
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
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, 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.
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.
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
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.
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
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
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
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
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
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
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 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
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
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. Available Online
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
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. 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
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 and Norman, J.E., 2006, Health-Based Screening Levels to Evaluate U.S. Geological Survey Ground-Water Quality Data: Risk Analysis, v. 26, no. 5, p. 1339-1348. 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
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
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
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
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
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
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
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
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
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. Available Online
Robert J. Gilliom, and Jeffrey D. Martin, 2004, The prevalence of pesticide mixtures in U.S. streams; Abstract 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
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
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. 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
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
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
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.
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
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
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
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.
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, 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
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
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
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. 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.
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
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
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
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
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 http://www3.interscience.wiley.com/cgi-bin/abstract/88010739/START 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.; 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
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
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
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
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
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
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
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.
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
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
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
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
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
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
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
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., 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
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