Organization and/or programme
- African Development Bank (AfDB)
- Asian Development Bank (ADB)
- Cap-Net
- DELTARES
- Economic Commission for Latin America and the Caribbean (UNECLAC)
- Environment and Security Initiative (ENVSEC)
- European Sediment Network (SedNet)
- Food and Agriculture Organization of the United Nations (FAO)
- Global Environmental Facility (GEF)
- Global Water Operators' Partnerships Alliance (GWOPA)
- Intergovernmental Panel on Climate Change (IPCC)
- International Atomic Energy Agency (IAEA)
- International Bank for Reconstruction and Development (IBRD)
- International Fund for Agricultural Development (IFAD)
- International Groundwater Resources Assessment Centre (IGRAC)
- International Monetary Fund (IMF)
- International Sava River Basin Commission
- International Telecommunication Union (ITU)
- Organization Security and Co-operation in Europe (OSCE)
- Secretariat of the Convention on Biological Diversity (CBD)
- The Economics of Ecosystems and Biodiversity (TEEB)
- UNDP Caribbean Risk Management Initiative (UNDP-CRMI)
- UNDP Water Governance Facility
- UNESCO Office in Jakarta
- UNESCO- Programme on Man and the Biosphere (MAB)
- UNESCO-IHE Institute for Water Education
- UNESCO-International Hydrological Programme (IHP)
- United Nations Children's Fund (UNICEF)
- United Nations Conference on Trade and Development (UNCTAD)
- United Nations Convention to Combat Desertification (UNCCD)
- United Nations Country Team in Afghanistan
- United Nations Department of Economic and Social Affairs (UNDESA)
- United Nations Department of Economic and Social Affairs (UNDESA), Statistics Division
- United Nations Development Programme (UNDP)
- United Nations Development Programme (UNDP) Regional Bureau for Africa (RBA)
- United Nations Economic and Social Commission for Asia and the Pacific (UNESCAP)
- United Nations Economic and Social Commission for Western Asia (UNESCWA)
- United Nations Economic Commission for Africa (UNECA)
- United Nations Economic Commission for Europe (UNECE)
- United Nations Educational, Scientific and Cultural Organization (UNESCO)
- United Nations Entity for Gender Equity and the Empowerment of Women (UN-Women)
- United Nations Environment Management Group (UNEMG)
- United Nations Environment Programme Financing Initiative (UNEPFI)
- United Nations Environment Programme (UNEP)
- United Nations Environment Programme (UNEP)/GRID-Arendal
- United Nations Environment Programme World Conservation Monitoring Centre (UNEP-WCMC)
- United Nations Framework Convention on Climate Change (UNFCCC)
- United Nations General Assembly (UNGA)
- United Nations Global Compact
- United Nations Human Settlements Programme (UN-Habitat)
- United Nations Industrial Development Organization (UNIDO)
- United Nations International Strategy for Disaster Reduction (UNISDR)
- United Nations Office for Sustainable Development (UNOSD)
- United Nations Peacebuilding Support Office (PBSO)
- United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA)
- United Nations Secretary-General's Advisory Board on Sanitation (UNSGAB)
- United Nations (UN)
- United Nations University Institute for Water, Environment and Health (UNU-INWEH)
- United Nations University (UNU)
- United Nations University-Institute for Environment and Human Security (UNU-EHS)
- United Nations University-International Human Dimensions Programme (IHDP)
- United Nations World Water Assessment Programme (WWAP)
- UN-Water
- UN-Water Decade Programme on Advocacy and Communication (UNW-DPAC)
- UN-Water Decade Programme on Capacity Development (UNW-DPC)
- Water Supply and Sanitation Collaborative Council (WSSCC)
- WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation (JMP)
- World Association of Girl Guides and Guirl Scouts (WAGGGS)
- World Bank
- World Bank Global Facility for Disaster Reduction and Recovery (GFDRR)
- World Bank Water and Sanitation Program (WSP)
- World Bank Water Partnership Program (WPP)
- World Health Organization (WHO)
- World Meteorological Organization (WMO)