Water quality classification
This map shows annual means of the SDG 6.3.2 core parameters dissolved oxygen, total nitrogen, total phosphorus and pH in rivers, lakes and reservoirs.
All data is derived from the GEMStat database and the classification and thresholds are provided by UN Environment (2017) and UN Water (2016).
As the classification covers at the moment only lakes, reservoirs, rivers and streams, GEMStat data on wetlands and groundwater stations are currently not included into the map. In the future more and more parameters and stations will be added.
UN Environment 2017. A Framework for Freshwater Ecosystem Management. Volume 2: Technical guide for classification and target-setting. Available under: https://www.unenvironment.org/resources/publication/framework-freshwater-ecosystem-management
UN Water, 2016. Integrated monitoring guide for SDG 6 targets and global indicators. Available under: http://www.unwater.org/publications/integrated-monitoring-guide-sdg-6/