Childhood lead exposure is associated with adverse health and development effects. There is no safe level of lead exposure, yet many children in the U.S. are exposed via multiple sources, including through their drinking water. In some cases lead-contaminated drinking water may be a result of a home or building’s internal plumbing fixtures, but there are also many communities across the country that are serviced by their water supplier via lead service lines. An estimated 11,200 community water systems across the U.S. have lead service lines. Full and safe replacement of these lead service lines is a step officials can take to reduce children’s exposure to lead in their communities. Public health and health care professionals can play an important part in the development of a community’s lead service line replacement program.