Public Health · single question
What is the recommended fluoride concentration in community water fluoridation (optimal level)?
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Correct answer: A. 0.7 ppm
✓ A) 0.7 ppm is correct.
The U.S. Public Health Service updated the recommendation in 2015 from a range of 0.7–1.2 ppm to a single optimal level of 0.7 ppm (mg/L) for community water fluoridation. This provides maximum caries protection while minimizing fluorosis risk. The original 1962 recommendation was 0.7–1.2 ppm adjusted for climate (more water consumed in hot climates → lower fluoride). The current universal recommendation is 0.7 ppm regardless of climate.
The U.S. Public Health Service updated the recommendation in 2015 from a range of 0.7–1.2 ppm to a single optimal level of 0.7 ppm (mg/L) for community water fluoridation. This provides maximum caries protection while minimizing fluorosis risk. The original 1962 recommendation was 0.7–1.2 ppm adjusted for climate (more water consumed in hot climates → lower fluoride). The current universal recommendation is 0.7 ppm regardless of climate.