The Centers for Disease Control and Prevention (CDC) announced a proposed operational control range around optimal fluoride concentration in community water systems that adjust fluoride, and monthly adherence to that range.
The proposed operational control range is 0.6 mg/L to 1.0 mg/L. CDC bases this guidance on the following considerations: (1) Concentration of fluoride in water shown to prevent tooth decay and (2) Ability of water systems to control variation in fluoride concentration.
Written comments must be received on or before October 11, 2018.