Lead poisoning is preventable. Before some uses of lead were restricted, approximately 88% of preschool children in the United States had lead levels high enough to cause serious health effects. With less lead in the environment, lead poisonings have decreased and become less severe.
No safe level of lead exposure has been identified. However, recommends public health interventions when a child’s blood lead level () is greater than 3.5 micrograms of lead per deciliter of blood (mcg/dL).