Which of the following is the current recommended concentration of fluoride in drinking water recommended by the U.S.Department of Health and Human Services?

Question

Quizplus · Accepted Answer

In January 2011,the U.S.Department of Health and Human Services (HHS)recommended lowering the recommended concentration of fluoride from a range of 0.7 to 1.2 mg/L to a flat 0.7 mg/L.
The previous recommendation was 1.0 mg/L,but it has been changed.
The recommended concentration has always been less than 2.0 mg/L.

Which of the Following Is the Current Recommended Concentration of Fluoride