According to a Cincinnati Children’s Hospital Medical Center study children are more vulnerable to the harmful effects of lead exposure at the age of 6 than they are in early childhood. For parents this means it is just as important to know about lead in your home and yard when your children reach school age as it was when they were toddlers. It also should raise the concern of parents everywhere to ensure their children are protected by community codes that require that all housing units are made lead safe, particularly rental units. Approximately 310,000 U.S. children age 1 to 5 years have blood lead levels greater than 10 micrograms per deciliter, the level at which the Centers for Disease Control and Prevention recommends public health actions be initiated. But research has consistently shown that blood lead levels considerably lower than 10 micrograms per deciliter are associated with adverse effects.