Question 2045 of 236 · California Water Treatment Operator Exam
What is the optimal fluoride level recommended by the U.S. Public Health Service for community water systems?
Exactly one answer is correct.
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Correct answer to question 2045
- A: 0.7 mg/L
Explanation
The 2015 US Public Health Service recommendation is 0.7 mg/L. The California MCL is 2.0 mg/L (22 CCR 64431) and the federal MCL is 4.0 mg/L (40 CFR 141.62(b)).
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