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Annual Renewable Water Supply
Per Person by River Basin1995
This map shows water supply per person for individual river basins. Water experts have found that when the water supply drops below 1,700 m³/person/year, the area experiences periods of "water stress" . In areas where annual water supplies drop below 1,000 m³/person/year, the consequences are very severe and cause food production and economic development problems (unless the region is wealthy enough to apply new technologies for water use, conservation, or reuse.) According to the PAGE analysis, as of 1995, 41 percent of the world's population, or 2.3 billion people, lived in river basins with "water stress," and of these, 1.7 billion people resided in highly stressed river basins where water supply fell below 1,000 m³/person/year. Citation: World Resources Institute
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