THE CONTROL of lead poisoning in children is a subject of increasing interest among physicians, the industries using lead in their products, public health workers, and informed citizens. This interest has grown rapidly in the past several years as a better understanding of the magnitude and the seriousness of the problem has developed. Persons and agencies in several cities have initiated efforts to control the illness. None of these efforts is complete and the problem continues to be serious in even the cities with the most advanced programs.