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Quality of the world's drinking water supply 1990-2020

Proportion of the population with access to drinking water sources worldwide from 1990 to 2020, based on quality of water source*

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Release date

July 2021



Survey time period

1990 to 2020

Supplementary notes

Figures were compiled from several editions of the report.
According to the source, improved drinking water sources are those that are protected from outside contamination, particularly faecal matter. However, some of these sources may not be adequately maintained and therefore may not actually provide “safe” drinking water. Thus, the number of people using such sources may have been over-estimated.

Some figures may not total 100% due to rounding

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Statistics on "Water industry in Japan"

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