What is the secondary MCL for fluoride in drinking water?

The secondary Maximum Contaminant Level (MCL) for fluoride in drinking water is established primarily for aesthetic reasons, such as taste, odor, and color, rather than direct health impacts. The secondary MCL for fluoride is set at 2.0 mg/L, which aims to prevent any potential negative effects associated with excessive fluoride levels, such as dental fluorosis or other undesired conditions.

In making this determination, agencies consider the likelihood of adverse effects on community acceptance and consumer satisfaction regarding water quality. While higher levels of fluoride may not pose immediate health risks, managing it to remain below 2.0 mg/L helps ensure that the water remains palatable and can effectively prevent any unnecessary concerns from the public regarding water safety.

Understanding this threshold is vital for water operators to ensure compliance with regulations and to maintain the quality of drinking water provided to the community. This level reflects both public health considerations and the importance of maintaining high-quality drinking water standards.