Ratio of wastewater treatment
The ratio of treated to untreated wastewater reaching water bodies for 10 regions. An estimated 90 per cent of all wastewater in developing countries is discharged untreated directly into rivers, lakes or the oceans (UN Water, 2008).
Year: 2010
From collection: Sick Water - The Central Role of Wastewater Management in Sustainable Development
Cartographer: UNEP/GRID-Arendal, Hugo Ahlenius