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Author/Creator
- Geological Survey (U.S.)78
- Louisiana. Department of Transportation and Development. Water Resources Section6
- Seanor, Ronald C.6
- Carter, R. F. (Robert F.), 1916-5
- Georgia. Environmental Protection Division5
- Hopkins, Evelyn H.5
- National Water-Quality Assessment Program (U.S.)5
- Perlman, Howard A.5
- Louisiana. Department of Transportation and Development4
- Smoot, Charles W.4
- Walters, David J.4
- Weaver, J. Curtis4
- Puerto Rico Aqueduct and Sewer Authority3
- Puerto Rico. Environmental Quality Board3
- Santiago-Rivera, Luis3
- Brantly, Jeffrey A.2
- California. Department of Water Resources2
- California. State Water Resources Control Board2
- Charlotte-Mecklenburg Utilities (Mecklenburg County, N.C.)2
- Fendick, Robert B.2