Quality of the world's drinking water supply 1990 to 2017

This statistic represents the proportion of the world's population with access to drinking water sources from 1990 to 2017, based on the quality of the drinking water source. In 1990, around 76 percent of the world's population had access to improved drinking water sources, this figure stood at 93 percent in 2017.

Proportion of the world's population with access to drinking water sources from 1990 to 2017, based on quality of water source*

Improved sourcesUnimproved sources
201793%8%
201591%9%
201089%11%
200586%14%
200083%17%
199579%21%
199076%24%
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Sources

Release date

June 2019

Region

Worldwide

Survey time period

1990 to 2017

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.

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