Researchers note that exposure to lead is especially a problem for those children who are minority, urban, and from low-income families. Drinking water's contribution to total lead exposure is typically low, particularly from water systems that optimize treatment for corrosion control. Because the quality of a public water supply affects the entire community, control of lead in drinking water is an important public health measure. Actions by water utilities of all sizes, manufacturers, and state and provincial regulators to minimize lead in drinking water are warranted. These actions could include optimizing drinking water treatment, limiting the use of lead-containing materials in plumbing, and educating the public on the risks of lead.
Some studies suggest harmful effects at even lower levels.
An exact blood lead level threshold below which no adverse health effects occur has not been identified. The MCLG expresses the ideal that no lead should be present in drinking water. This significant decrease in average blood lead levels has been attributed to removal of lead from gasoline and soldered cans. Significance of Lead in Drinking Water Drinking water is one of several sources of lead exposure. Its relative contribution to total lead exposure is usually low, particularly in water systems where corrosion control has been optimized.