Global Environmental Monitoring System (GEMS) Global Water Quality Monitoring Network Data and Statistics (GEMStat)

The United Nations GEMS/Water Programme 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.

GEMS/Water is hosted by Environment Canada at the National Water Research Institute (NWRI) and operates under the auspices of the United Nations Environment Programme. Maintained at NWRI is the GEMS/Water data warehouse, GEMStat. GEMStat is designed to share surface and ground water quality data sets collected from the GEMS/Water Global Network, including over 2,700 stations, two million records, and over 100 parameters.