Global inequalities in lake water quality and freshwater security risks revealed by satellite mapping (IMAGE)
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Satellite-based assessment using the GlakeWQ framework reveals global patterns of lake water quality across 16,409 lakes in 145 countries and quantifies population exposure to different water quality conditions. The results highlight pronounced regional inequalities in freshwater security, with vulnerable populations disproportionately exposed to poor-quality lake water. a, Global status of lake water quality and national progress toward SDG 6.3.2 targets. b, Population exposure to different lake water quality classes. c, Representative lake water quality patterns across countries with different development levels. d, Long-term relationships between lake health indicators (chlorophyll-a concentrations or algal bloom frequency) and socioeconomic development for representative lakes.
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