What is the action level for lead in drinking water?

The action level for lead in drinking water is 0.015 mg/L. This threshold is important because it serves as a guideline for water suppliers to take action to reduce lead levels when the concentration of lead in sampled tap water exceeds this limit. The U.S. Environmental Protection Agency (EPA) established this level as part of its Lead and Copper Rule, which aims to protect public health by minimizing lead and copper levels in drinking water. When this action level is exceeded in more than 10% of taps sampled, water systems are required to take measures such as replacing lead service lines, enhancing water treatment processes, and providing public education to inform consumers about health risks.