Progress on wastewater treatment 2021: global status and acceleration needs for SDG indicator 6.3.1

Target 6.3 is: “By 2030, improve water quality by reducing pollution, eliminating dumping and minimizing release of hazardous chemicals and materials, halving the proportion of untreated wastewater and substantially increasing recycling and safe reuse globally”. Indicator 6.3.1 tracks the proportion of total, industrial and household wastewater flows safely treated in compliance with national or local standards. The household component includes both sewage and faecal sludge, treated on-site or off-site, with linkages to indicator 6.2.1a on sanitation. This report presents the global status on wastewater treatment and acceleration needs to achieve target 6.3 by 2030, based on the latest data on indicator 6.3.1 (total wastewater flows as well as flows from industrial sources and households).