What is the maximum contaminant level (MCL) for fluoride in water?

The maximum contaminant level (MCL) for fluoride in water is established to protect public health by limiting exposure to this substance, which can pose health risks at elevated levels. The MCL for fluoride is set at 4 parts per million (ppm). This level was determined based on studies that assess the potential health effects of fluoride consumption, particularly regarding dental and skeletal fluorosis.

The determination of this maximum level takes into account the balance between the benefits of fluoride for dental health and the risks of higher concentrations that could lead to adverse effects. Setting the MCL at 4 ppm helps ensure that water systems do not exceed this threshold, thereby safeguarding consumers from potential health issues associated with excessive fluoride intake.

Understanding the significance of the MCL for fluoride is crucial for water operators to ensure compliance with health regulations and to maintain water quality standards for the safety of the community they serve.