What is the action level for copper in drinking water?

The action level for copper in drinking water is established at 1.3 mg/L. This value is set by the Environmental Protection Agency (EPA) as part of the Lead and Copper Rule, which aims to control the corrosion of lead and copper pipes in public water systems. When concentrations of copper exceed this action level, water systems are required to take specific actions to mitigate the levels of copper present in the drinking water, such as optimizing corrosion control treatment or providing educational materials to consumers.

The significance of maintaining copper levels at or below this threshold lies in protecting public health, as excessive copper consumption can lead to health issues such as gastrointestinal distress and liver damage. Thus, the action level serves as a crucial safeguard in ensuring that the drinking water remains safe and healthy for consumption.