Acid rain and deforestation runoff are causing a drop in the calcium content of some lakes in North America and western Europe, with ominous potential effects.
Artists will overlay the path of hidden creeks and arroyos on San Francisco's city streets, in a nod to waterways that used to run through nearly every valley in the city.
About 96 percent of the four-lake water complex that feeds Metropolitan Sao Paulo, home to 20 million, has been used up.
New research makes a direct link between Pennsylvania's tainted drinking water and leaky fracking wells in the Marcellus Shale.
The glaciers on the Tibetan plateau -- which provide freshwater for 2 billion people -- are warmer than in the past two millennia.
The ban on drinking tap water in Toledo has been lifted, but there's worry that a dangerous toxin caused by algae blooms in Lake Erie will return this year. Continue reading →
If California's drought continues beyond year three, experts say that the thirsty state could be in danger of a slow-motion water apocalypse.
The Colorado River Basin's underground water supplies are shrinking faster than they're being replenished.
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