Over time, lead can damage children’s nervous systems which may result in small changes to IQ and behavior. Since the brain develops before birth but continues for the first several years of life, pregnant women and children six years of age and under are at higher risk than older children and adults.
Children and adults exposed to high levels of arsenic may have irritation of the stomach and intestines, blood vessel damage, skin changes, and reduced nerve function. Long-term exposure in children may lead to learning disabilities and other neurological effects. High levels of arsenic can also increase the risk of developing cancer.