Funding Sources Include:
- Philanthropic Foundations and Individuals
- Arizona Department of Water Resources (ADWR)
- Bureau of Reclamation (BOR)
- California Bay Delta Agency (CALFED)
- California Department of Water Resources (CaDWR)
- California Energy Commission (CEC)
- Food and Agriculture Organization (FAO) of the United Nations
- GOAL Honduras
- International Organization for Migration (IOM)
- National Aeronautics and Space Administration (NASA)
- National Oceanic and Atmospheric Administration / National Weather Service (NOAA-NWS)
- National Oceanic and Atmospheric Administration / Office of Global Programs (NOAA-OGP)
- National Oceanic and Atmospheric Administration / Sectoral Applications Research Program (NOAA-SARP)
- National Science Foundation (NSF)
- Panama Canal Authority (PCA)
- Public International Organizations
- South African Weather Services
- Sultanate of Oman, Public Authority for Civil Aviation
- United States Geological Survey (USGS)
- University Corporation for Atmospheric Research (UCAR)
- U.S. Army Corps of Engineers (COE)
- U.S.-Israel Binational Science Foundation (BSF)
- World Bank
- World Meteorological Organization (WMO)
HRC Collaborators
- Georgia Institute of Technology
- Hebrew University of Jerusalem
- National Meteorological and Hydrologic Services Globally
- Peru National Meteorological and Hydrological Service (SENAMHI)
- University of Arizona Department of Hydrology and Atmospheric Sciences
- University of Arizona Laboratory of Tree-Ring Research
- University of Arizona / Water Resources Research Center
- University of California San Diego / Scripps Institution of Oceanography (SIO)
- University of Iowa
- University of Wisconsin
- Utah State University
- Various Private Companies
- World Meteorological Organization