Lead poisoning: Water supply to most Chicago houses contaminated

Lead was found in nearly 70 percent of the water samples collected by a leading local newspaper.

Pipes in some cities across the United States are so old that they are leaching out lead into water systems.

The Chicago Tribune has found 70 percent of houses in Chicago had lead in tap water. In three out of the 10 samples, lead levels exceeded five parts per billion, the maximum level the US Food and Drug Administration allows in bottled water.

Al Jazeera’s John Hendren reports.