641—67.1 (135) Purpose. The purpose of the blood lead testing requirement is to improve the health of Iowa’s children. Blood lead testing will facilitate early detection and referral for treatment of lead poisoning; reduce the incidence, impact, and cost of lead poisoning; inform parents and guardians of their children’s exposure to lead; promote the importance of reducing exposure to lead as an integral component of preparation for school and learning; and contribute to statewide surveillance of childhood lead poisoning.