Author
Geological Survey (U.S.)
266
United States. Environmental Protection Agency. Office of Water
184
Geological Survey (U.S.),
170
Colorado. Department of Public Health and Environment. Water Quality Control Division
115
Source Water Assessment and Protection Program (Colo.)
65
United States. Environmental Protection Agency
59
United States. Congress. Senate. Committee on Environment and Public Works,
52
SpringerLink (Online service)
50
Library of Congress. Congressional Research Service,
45
United States. Congress. Senate. Committee on Environment and Public Works
38
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment
31
ScienceDirect (Online service)
25
United States. Congress. House. Committee on Transportation and Infrastructure
23
Colorado Water Resources Research Institute
22
California. State Water Resources Control Board
21
National Water-Quality Assessment Program (U.S.)
20
Belitz, Kenneth
18
Colorado. Department of Agriculture
18
Colorado. Water Quality Control Commission
17
Colorado State University. Cooperative Extension Service
16
United States. Bureau of Reclamation
16
United States. Environmental Protection Agency. Office of Research and Development
16
Waskom, R. M.
16
U.S. Fish and Wildlife Service
14
United States. Congress. House. Committee on Transportation and Infrastructure,
14
California. State Water Resources Control Board,
13
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment,
13
United States. Environmental Protection Agency,
13
United States. Environmental Protection Agency. Office of Wetlands, Oceans, and Watersheds
13
Fram, Miranda S.
12
Ground Water Ambient Monitoring and Assessment Program (Calif.)
12
United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Water and Wildlife,
12
Agricultural Chemicals and Groundwater Protection (Program)
11
National Risk Management Research Laboratory (U.S.)
11
Belitz, Kenneth,
10
Gatz, Laura,
10
United States. Army. Corps of Engineers. Pacific Division
10
United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Fisheries, Water, and Wildlife,
10
Bauder, Troy Allen
9
Colorado State University. Environmental Resources Center
9
Colorado. Division of Plant Industry
9
Copeland, Claudia,
9
Ramseur, Jonathan L.,
9
United States,
9
United States. Environmental Protection Agency. Assessment and Watershed Protection Division
9
United States. Environmental Protection Agency. Office of Science and Technology
9
Colorado Water Conservation Board
8
Colorado. Agricultural Chemicals and Groundwater Protection Advisory Committee
8
Colorado. Division of Local Government
8
United States. Environmental Protection Agency. Office of Ground Water and Drinking Water
8
more ...