Common weed killer taints water supplies

As part of its ongoing series on water pollution in America, The New York Times looks at the impact of atrazine, a popular weed killer, on our water supply . Recent research indicates that exposure to low concentrations of atrazine may be linked to low birth weights, birth defects and menstrual problems. The Times investigation found "that in some towns, atrazine concentrations in drinking water have spiked, sometimes for longer than a month. But the reports produced by local water systems for residents often fail to reflect those higher concentrations."