LEAD IN WATER. “In 1991, the EPA estimated that lead in drinking water harms the health of millions of children, causing more than 560,000 children to exceed the level of concern for blood-lead levels defined by the CDC. (A recent EPA rule regulating lead in drinking water may have reduced this number of children.). Particularly susceptible to waterborne lead poisoning are infants.”
http://www.nrdc.org/health/kids/ocar/chap7.asp