Several organizations affiliated with UN-Water maintain searchable database facilities, providing the opportunity for data retrieval, tailored to the users' needs.

General Information

Facts and figures - World Water Assessment Programme (WWAP)
International Work Session on Water Statistics (UNSD)
UN-Water Africa (UNECA)
Key Development Data & Statistics (World Bank)

Water Resources

Hydrology and water - Data access (WMO)
Review of water resource statistics by country (FAO)
Watersheds of the world (IUCN)
World Water and Climate Atlas (IWMI)

Urban and Rural Water Supply and Sanitation

Water, environment and sanitation (UNICEF)
Joint Monitoring Programme (WHO/UNICEF)
On-line Databases (Sanitation Conection)

Water for Agriculture

AQUASTAT - Global information system (FAO)
Fisheries databases and statistics (FAO)

Water for Environment and Health

Global water quality data and statistics GEMS Water Programme
RAMSAR sites information service RAMSAR