According to the Lead and Copper Rule, what is the action level for lead?

The action level for lead, as established by the Lead and Copper Rule, is set at 0.015 mg/L. This threshold is critical because it guides water systems on when to take necessary actions to control lead levels in drinking water. If lead levels exceed this action level during routine monitoring, water systems must take further steps which can include increased corrosion control, public education about lead exposure, or lead service line replacement. This regulation aims to protect public health by minimizing lead exposure, especially for vulnerable populations such as children and pregnant women. The other concentrations listed do not align with the established regulatory limit, making them incorrect choices.