The ICWRGC hosts, operates and maintains the Global Water Quality database and information system GEMStat under the auspices of the United Nations Environment Programme (UN Environment).
Countries and organisations voluntarily provide water quality data from their own monitoring networks. 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. If you need data, please browse and request through www.gemstat.org