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 level is set to protect public health, particularly for vulnerable populations such as children and pregnant women, as elevated levels of copper can lead to health problems. The Environmental Protection Agency (EPA) has determined that if the concentration of copper in drinking water exceeds this threshold, water systems must take action to control the corrosiveness of the water and reduce copper levels, commonly by implementing corrosion control measures or providing public education. Understanding this standard is crucial for water operators to ensure compliance with safety regulations and maintain the safety and quality of drinking water supplies.