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Safe drinking water gets harder to tap

Foul-smelling water mixed with coal runs from Kenny Stroud's faucet in Rawl, W.Va. For years, residents of the Appalachian coal-mining town have had to rely on water trucks and deliveries for clean water.

- Melissa Farlow/From Blue Planet Run

Children walk on a water pipe in Mumbai, India. Because water is prohibitively expensive, many slum dwellers rely on leaks in the massive pipelines that carry water to more affluent neighborhoods.

- Christopher Brown, Redux/From Blue Planet Run

Kenyan villagers on Pate Island gather brackish drinking water from holes in the sand, less than 300 feet from the ocean.

- George Steinmetz/From Blue Planet Run

Children in Beijing show their reaction to polluted water in a jar. China's water is increasingly toxic. Seventy percent of the nation's major rivers no longer support life, and 25 percent to 33 percent of the population -- 300 million people -- does not have access to safe drinking water.

- Fritz Hoffmann/From Blue Planet Run