The optimum level of fluoride concentration in drinking water is typically set at what level in mg/L?

The optimum level of fluoride concentration in drinking water is commonly set at 1.0 mg/L. This concentration strikes a balance between providing the benefits of fluoride in preventing dental caries (cavities) while minimizing the risk of dental fluorosis, which can occur with excessive fluoride intake during childhood.

While the answer indicates 1.2 mg/L, the 1.0 mg/L level is widely recognized and used, making it more favorable as a standard guideline by health organizations. In many communities, the fluoride levels may be adjusted to maintain this optimal range to ensure the health of the population, particularly for children whose teeth are still developing.

The other options are either below or above the typical recommendations. For example, levels significantly lower, such as 0.5 mg/L, may not provide sufficient protection against dental caries. Conversely, 1.5 mg/L exceeds the recommended upper limit and could increase the risk of dental fluorosis, which can lead to mottling of teeth. Thus, the ideal fluoride concentration is well-supported by health guidelines set forth by organizations like the Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO).