Public Health · single question
What is the currently recommended optimal level of community water fluoridation (U.S.)?
Show answer and explanation
Correct answer: A. 0.7 ppm
Optimal community water fluoridation = 0.7 ppm.
- A. Correct. The U.S. recommendation since 2015 is a single value of 0.7 mg/L (ppm).
- B. Older guidance used a 0.7–1.2 ppm range; the current single optimal value is 0.7 ppm.