The 35-year-old federal law regulating tap water is so out of date that the water Americans drink can pose what scientists say are serious health risks — and still be legal.
Only 91 contaminants are regulated by the Safe Drinking Water Act, yet more than 60,000 chemicals are used within the United States, according toEnvironmental Protection Agencyestimates. Government and independent scientists have scrutinized thousands of those chemicals in recent decades, and identified hundreds associated with a risk of cancer and other diseases at small concentrations in drinking water, according to an analysis of government records by The New York Times.
This slideshow about the water in Los Angeles was also mentioned in the New York Times
"The Los Angeles Department of Water and Power lab tests water samples for traces of metals. Los Angeles had to abandon 40 percent of its municipal wells in one area of the city because they were polluted with manufacturing solvents and toxins."