Geological Survey (U.S.) 2,230 Geological Survey (U.S.), 1,397 National Water-Quality Assessment Program (U.S.) 299 United States. Environmental Protection Agency 113 United States. Bureau of Reclamation 90 United States. Bureau of Land Management 73 United States. National Park Service 71 U.S. Fish and Wildlife Service 47 United States. Army. Corps of Engineers 47 SpringerLink (Online service) 44 United States. Environmental Protection Agency. Office of Water 44 United States. Department of Energy 39 United States. Bureau of Indian Affairs 36 California. State Water Resources Control Board 34 New York (State). Department of Environmental Conservation 28 Geological Survey (U.S.). Water Resources Division 27 New Jersey. Department of Environmental Protection 23 Washington (State). Department of Ecology 23 Wisconsin. Department of Natural Resources 22 Missouri. Division of Environmental Quality 21 Belitz, Kenneth 19 Colorado. Department of Public Health and Environment. Water Quality Control Division 19 Kansas. Department of Health and Environment 19 United States. Environmental Protection Agency, 19 Wells, J. V. B. 19 Florida. Department of Environmental Regulation 18 Ground Water Ambient Monitoring and Assessment Program (Calif.) 17 Illinois. Environmental Protection Agency 17 Pennsylvania. Department of Environmental Protection 17 Southwest Florida Water Management District (Fla.) 16 Andrews, William J., 1962- 15 Colorado Geological Survey 15 Field, Stephen J. 1935- 15 Monroe County (N.Y.). Department of Health 15 Pope, Larry M. 15 Robertson, Dale M. 15 Tanner, Dwight Q. 15 Welch, Alan H. 15 Williams, Rhea P. 15 Butler, David L. 1946- 14 Ohio. Division of Reclamation 14 United States. Forest Service 14 Wichita (Kan.) 14 Louisiana. Department of Transportation and Development 13 Minnesota. Department of Natural Resources 13 New Jersey. Department of Environmental Protection and Energy 13 Rose, William J. 13 South Florida Water Management District (Fla.) 13 Tornes, L. H. 13 California. Department of Water Resources 12 Love, S. K. 1903-1995 12 Minnesota Pollution Control Agency 12 Parliman, D. J. 12 Petersen, James C. 1952- 12 St. Johns River Water Management District (Fla.) 12 Woodside, M. D. 12 Arizona. Department of Water Resources 11 Chesapeake Bay Program (U.S.) 11 Colorado. Oil and Gas Conservation Commission 11 Kimbrough, Robert, 1957- 11 Montana. Department of Natural Resources and Conservation 11 National Water-Quality Assessment Program (U.S.), 11 Peterson, David A. 1955- 11 Sando, Steven Kent, 1956- 11 Wyoming. State Engineer's Office 11 Belitz, Kenneth, 10 Clark, G. M. 1958- 10 Colorado Water Resources Research Institute 10 Hamilton, Pixie A. 10 Oregon. Department of Environmental Quality 10 Sherwood, Donald A. 10 Spahr, Norman E. 10 Wolf, R. J. 10 Young, H. W. 1942- 10 Brabets, Timothy P. 9 Bragg, Heather M. 9 Connecticut. Department of Environmental Protection 9 Ebbert, J. C. 9 Garrett, Ronald G. 9 Hall, Dennis C. 9 Houston (Tex.) 9 Idaho. Department of Water Resources 9 Langland, Michael J. 9 Massachusetts. Department of Environmental Protection. Office of Watershed Management 9 New Hampshire. Water Resources Division 9 New Martinsville (W. Va.) 9 Oblinger, Carolyn J. 9 Rickert, David A., 1940- 9 Speiran, Gary K., 9 United States. Environmental Protection Agency. Office of Research and Development 9 United States. Federal Highway Administration 9 Alpers, Charles N., 1958- 8 Anderson, Chauncey W. 8 Arkansas. Department of Pollution Control and Ecology 8 Bales, Jerad 8 Barker, James L., 1936- 8 Bartholomay, Roy C. 8 Brabets, Timothy P., 8 Clark, Melanie L. 8 Colorado. Water Quality Control Commission 8