What Are U.S. Standards for Lead Levels in drinking water?

Lead enters drinking water primarily through plumbing materials. Exposure to lead may cause health problems ranging from stomach distress to brain damage. Therefore, federal agencies have issued advisory standards or enforceable regulations that set lead levels in drinking water. 

The action level of U.S. Environmental Protection Agency's (EPA) for lead in drinking water is 15ppb [EPA 1991; EPA 2000b].  The U.S. Food and Drug Administration (FDA) level for bottled water is 5 ppb [FDA 2009].