RA VI (Europe)

• National Institute for Water and Hydrometry - Austria (German)
  
• Directorate of Natural Resources and the Environment - Belgium
  
• Water in France
  
• German Advisory Council on Climate Change - Germany
  
• HYDROINFO - Hungary (Hungarian)
  
• Environmental Information Centre - Macedonia
  
• Institute for Inland Water Management and Waste Water Treatment (RIZA) - Netherlands
  
• Environment and Heritage Service - Northern Ireland
  
• Department of Agriculture and Rural Development - Northern Ireland
  
• Norsk Hydrology - Norway
  
• Central Flood Committee - Poland
  
• Commission for Hydro-Geological Documentation - Poland
  
• Institute of Water (INAG) - Portugal
  
• Scottish Environment Protection Agency
  
• Ministerio de Medio Ambiente - O.A.C Confederaciones Hidrográficas - Spain
  
• State Hydraulic Works - Turkey
  
• British Waterways - UK
  
• Environment Agency - UK
  
• Environment Agency - Wales
  

RA V (South-West Pacific)

• Land and Water Resources Research and Development Corporation (LWRRDC) - Australia
  
• Sydney Catchment Authority - Australia
  
• Water and Rivers Commission - Australia
  

RA IV (North and Central America)

• Environment Canada
  
• Water Resources Authority - Jamaica
  
• National Weather Service, Office of Hydrology - USA
  
• United States Committee on Large Dams - USA
  
• United States Environmental Protection Agency, Office of Water - USA
  
• United States Geological Survey, Water Resources of the United States - USA
  

RA III (South America)

• Ministerio do Meio Ambiente
  
• Uruguay
  

RA II (Asia)

• Ministry of Water Resources - China
  
• Ministry of Water Resources - India
  
• Ministry of Health and Welfare - Japan
  
• River Bureau, Ministry of Construction - Japan
  
• Water Policy in Japan
  

RA I (Africa)