In 1990 the Massachusetts Legislature passed the Occupational Lead Poisoning Registry Law (M.G.L. Chapter 200). The Registry was created because occupational exposure to lead is still a major cause of disease. Excessive exposure can cause serious damage to the blood, kidneys and nervous and reproductive systems. Occupational lead poisoning is still quite common in the U.S., despite the availability of effective control technologies and the existence of state and federal regulations designed to limit exposure. The Occupational Lead Poisoning Registry tracks elevated blood lead levels, provides educational counseling and guidance to workers, and through its medical consultant, offers advice to physicians on the medical management of lead poisoning.