What is the Maximum Contaminant Level (MCL) for Copper (Cu) in drinking water?

The Maximum Contaminant Level (MCL) for copper in drinking water is set at 1.3 mg/L, which reflects the permissible level allowed in drinking water systems to protect public health. Copper can enter drinking water through various sources, including corrosion of household plumbing systems, and it is essential to monitor and regulate this contaminant to prevent potential health effects, especially in vulnerable populations like children and pregnant women.

Regulatory agencies, such as the Environmental Protection Agency (EPA), establish this value based on scientific studies that evaluate the health risks associated with copper exposure. The 1.3 mg/L standard is designed to limit the potential adverse effects that excessive copper levels may have, including gastrointestinal distress and liver or kidney damage at very high concentrations. By enforcing this MCL, water utilities can ensure that the water supplied to consumers is within safe limits, promoting overall public health and safety.