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Headline data

Proportion of domestic and industrial wastewater flows safely treated
Year Value Series
2019 48.3 Proportion of domestic and industrial wastewater flows safely treated
2022 41.3 Proportion of domestic and industrial wastewater flows safely treated

Source: World Health Organisation

Geographical Area:

Unit of Measurement: Percentage (%)

Footnote:

This table provides metadata for the actual indicator available from Nigeria statistics closest to the corresponding global SDG indicator. Please note that even when the global SDG indicator is fully available from Nigerian statistics, this table should be consulted for information on national methodology and other Nigerian-specific metadata information.

Metadata update

2025-12-10
Definition and concepts

Proportion of wastewater generated both by households (sewage and faecal sludge), as well as economic activities (based on ISIC categories) safely treated compared to total waste water generated both through households and economic activities. While the definition conceptually includes wastewater generated from all economic activities, monitoring will focus on wasterwater generated from hazardous industries (as defined by relevant ISIC categories)
Data last updated Mar 13, 2025
Metadata last updated Dec 15, 2025

This table provides information on metadata for SDG indicators as defined by the UN Statistical Commission. Complete global metadata is provided by the UN Statistics Division.

Indicator

Indicator 6.3.1: Proportion of domestic and industrial wastewater flows safely treated
Target

Target 6.3: 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
Metadata update

2025-04-23
International organisations(s) responsible for global monitoring

United Nations Human Settlements Programme (UN-Habitat)

World Health Organization (WHO)

United Nations Statistics Division (UNSD)
Related indicators

The domestic portion of wastewater treated is closely linked to indicator 6.2.1a on the “proportion of population using safely managed sanitation services”, and draws upon some of the same data sources.

The indicator is also directly linked to indicator 6.3.2 on the “proportion of bodies of water with good ambient water quality”, because unsafe wastewater treatment leads to degradation in quality of the receiving waters. It directly informs progress towards target 6.3 and is strongly linked to target 6.6 on water-related ecosystems, as well as target 14.1 on marine pollution (coastal eutrophication).

Source 1

Organisation

World Health Organisation
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