The Thirst for Safe Water Series: Part One - Microbes in our Drinking Water

Living on Earth
The World
The United States has one of the best water supplies in the world, and some of the worst waterborne diseases are just about unknown here. But, research now shows that new risks to drinking water can resist even chemical treatment. Daniel Grossman reports from Philadelphia where the water meets all federal clean water standards, but evidence shows that certain disease-causing microbes are getting through the city's treatment system.
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