What is the action level for copper in drinking water?

The action level for copper in drinking water is set at 1.3 mg/L. This value is established by the United States Environmental Protection Agency (EPA) under the Lead and Copper Rule, which aims to protect public health by reducing the levels of lead and copper in drinking water. If testing shows that the concentration of copper exceeds this action level, it triggers required actions from the water supplier to evaluate and potentially mitigate the sources of copper in the water system. Understanding this standard is crucial for ensuring safe drinking water and protecting community health, especially in areas where plumbing materials might contribute to copper levels.