Author/Creator
- United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment33
- United States27
- United States. Environmental Protection Agency15
- United States. Environmental Protection Agency. Office of Water10
- United States. Federal Water Pollution Control Administration10
- United States. General Accounting Office10
- Municipal Environmental Research Laboratory8
- United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Environmental Pollution8
- Center for Environmental Research Information (U.S.)7
- United States. Environmental Protection Agency. Office of Wastewater Management7
- United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Superfund and Environmental Oversight5
- United States. Division of Water Supply and Pollution Control5
- Jenkins, Kenneth H.4
- Rubin, Kenneth4
- Thoman, John R.4
- United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Transportation, Tourism, and Hazardous Materials4
- United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Environment and Natural Resources4
- United States. Congress. Joint Committee on Taxation4
- United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Fisheries, Water, and Wildlife, author4
- United States. Environmental Protection Agency. Office of Research and Development4