Professional/Scientific Societies

American Fisheries Society

Ecological Society of America

North American Benthological Society

Conservation Groups (non-government)

American Rivers

Aquatic Conservation Network

International Rivers Network

Global Rivers Environmental Education Network

The River Network

Save Our Wild Salmon

Trout Unlimited

The Watershed Management Council

Government Agencies

U.S. Environmental Protection Agency, Office of Wetlands, Oceans, and Watersheds

U.S. Fish & Wildlife Service

U.S. Geological Survey -- Water Resources of the U.S.

U.S. Geological Survey -- National Water Quality-Assessment (NAWQA) Program

National Park Service

Glen Canyon/Grand Canyon