Contamination

American drinking water meets federal safety standards, but some say it's only because those standards are far too low and don't accurately reflect the potential for contamination.

New public space has opened in Sao Paulo, Brazil, in an unlikely place. The new park sits a few feet above the contaminated grounds of a deactivated municipal incinerator.

Contaminated water is bad news for cities, unless nobody knows about it. This post from Good looks at some of the most notorious water contamination cover ups in recent U.S. history.

This slideshow from Popular Science looks at some of the most heavily polluted cities in the world.