What is the MCL for fluoride in drinking water?

The maximum contaminant level (MCL) for fluoride in drinking water is set at 4.0 mg/L. This standard is established by the Environmental Protection Agency (EPA) to protect public health. Fluoride, while beneficial for dental health in small amounts, can lead to adverse effects such as dental fluorosis or skeletal issues if consumed in excessive quantities over time. The MCL is a regulatory limit intended to ensure that fluoride concentrations remain at safe levels to prevent these health risks. It is critical for water treatment facilities to monitor fluoride levels to comply with this standard and safeguard the health of the community.