Analysis of a Study of Lead Wheel Weight Deposition and Abrasion in New Jersey

This paper analyzes the implications for children's health of shortcomings in the methods and results of a study of lead in the environment, "Quantity of Lead Released to the Environment in New Jersey in the Form of Motor Vehicle Wheel Weights," by the New Jersey Department of Environmental Protection (Aucott and Caldarelli, Water, Air, & Soil Pollution, 223, 1743-1752, 2012). The study significantly understates the amount of lead deposited in New Jersey streets as 12 metric tons per year and incorrectly concludes that only 40 kg per year of the lead from wheel weights is abraded into small particles. The 2012 New Jersey Department of Environmental Protection (NJDEP) study misleads regulators and the public into believing that little toxic particulate lead from abraded wheel weights occurs on the streets of New Jersey and by implication that little occurs elsewhere in the United States, thus minimizing the potential health risk that lead wheel weights may have to our nation's children and indeed all of us.