Intergovernmental Hydrological Programme

This layer represents percentage of population connected to a wastewater collecting system, with or without treatment, in 2009. The table also provides data for other years .For more information, visit the Environment Statistics Section website: https://unstats.un.org/unsd/environment/default.htm. Information on the methodology can be found in the report on International Recommendations for Water Statistics: https://unstats.un.org/unsd/publication/seriesM/seriesm_91e.pdf