Press Release - Globally, over 3 billion people are at risk of disease because the water quality of their rivers, lakes and groundwater is unknown, due to a lack of data. Meanwhile, a fifth of the world's river basins are experiencing dramatic fluctuations in water availability, and 2.3 billion people are living in countries categorized as "water-stressed," including 721 million in areas where the water situation is "critical," according to recent research carried out by the United Nations Environment Programme (UNEP) and