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GEMS/Water Data Centre

The GEMS/Water Data Centre operates the global water quality database and information system GEMStat of the UN Environment Global Environment Monitoring System for Water (GEMS/Water). GEMStat provides scientifically-sound data and information on the state and trends of global inland water quality required as a basis for the sustainable management of the world’s freshwater to support global environmental assessments and decision-making processes.

The Data Centre is part of the International Centre for Water Resources and Global Change (ICWRGC) and hosted by the German Federal Institute of Hydrology (BfG) in Koblenz, Germany. Countries and organisations voluntarily provide water quality data from their own monitoring networks to GEMStat. The water quality data available in GEMStat can be used for status evaluation, policy-making, research purposes or within the scope of education and training initiatives.
At present, the growing database contains more than 4 million entries for rivers, lakes, reservoirs, wetlands and groundwater systems from 75 countries and approximately 4000 stations. Overall, data is available for the time period from 1965 to 2017 and about 250 parameters.

International Centre for Water Resources and Global Change
GEMS/Water Data Centre
Federal Institute of Hydrology
P.O. Box 200253
56002 Koblenz


Global Water Quality Data and Statistics

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