Working-level engineers, scientists, and managers in the Bureau of Reclamation and U.S. Army Corps of Engineers (two of the primary federal water management agencies) and scientists and managers in the U.S. Geological Survey and National Oceanic and Atmospheric Administration (two of the primary federal water and climate related science agencies) formed the Climate Change and Water Working Group in 2008. The Environmental Protection Agency, Federal Emergency Management Agency, and NASA have since joined CCAWWG.
Reclamation and USACE published science needs, along with a perspective on these needs from other local, state, and federal water management agencies, in the 2011 report: "Addressing Climate Change in Long‐Term Water Resources Planning and Management: User Needs for Improving Tools and Information." Today, CCAWWG is providing an effective working-level forum that fosters communication and research partnerships around these needs across the water and science communities of practice.
CCAWWG working-level collaboration informs and is coordinated with higher level interagency activities such as the Global Change Research Program, Council of Environmental Quality- Interagency Climate Change Adaptation Task Force, and the Committee on Environment and Natural Resources - Subcommittee on Water Availability and Quality. The Interagency Climate Change Adaptation Task Force has recognized CCAWWG as a valuable avenue of federal collaboration.