Lead in drinking water has evolved into a nationwide concern. Lead can come from decaying infrastructure underground and fixtures in your home. NSF International is a public health and safety organization which has led development of standards governing water quality. In 1990, the U.S. Environmental Protection Agency replaced its own drinking water standards with a water advisory program that includes these NSF/ANSI standards. NSF certifies water treatment and filtration systems to these standards. If you are concerned about lead in your drinking water, NSF International has educational resources, guides and tips.