Federal

National Oceanic and Atmospheric Administration, National Weather Service
Tennessee Valley Authority
U.S. Department of Agriculture, Natural Resources and Environment
U.S. Department of the Interior, U.S. Geological Survey
U.S. Environmental Protection Agency, Office of Water
U.S. Army Corps of Engineers

Regional, State, and Local

Association of American State Geologists
Association of Metropolitan Water Agencies
Association of State Drinking Water Administrators
Association of State Flood Plain Managers
Association of State and Interstate Water Pollution Control Administrators
Interstate Council on Water Policy
National Association of Clean Water Agencies
National Association of County Planners
Western States Water Council

Industry

American Society of Civil Engineers
Electric Power Research Institute
National Council for Air and Stream Improvement, Inc.

Academia

The Universities Council on Water Resources, Inc.

Professional Associations

American Water Resources Association
American Water Works Association
Ecological Society of America
Ground Water Protection Council
League of Women Voters
National Ground Water Association
North American Lake Management Society
Water Environment Federation

Recommended:

Agriculture, Engineering, Environment, Outdoor Recreation

ACWI Member sites