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Updated: Jan. 9, 2026

What is Fluoride?

Fluoride is a natural mineral found in water, soil and rocks. Fluoride helps keep our teeth strong and free from cavities. In some areas, fluoride occurs naturally in the water supply, but in most areas, fluoride needs to be added to reach a level that is beneficial.

Community Water Fluoridation

Community leaders have come to realize that fluoridation benefits their entire community- both children and adults of all ages. Fluoridated tap water protects against cavities, and studies show that it reduces tooth decay by about 25 percent over a person's lifetime. Communities routinely test the water in their systems to meet safety standards. If fluoride is added to the water, the systems are monitored to ensure the level is safe and effective for preventing cavities.

Simply by drinking fluoridated tap water, everyone in a community benefits, regardless of income or access to routine dental care. Approximately 170 million people in the United States are served by public water systems in the U.S. and benefit from fluoridation.

  • Fluoridation is safe.
  • Fluoridation of community water supplies benefits everyone.
  • Fluoridation is cost-effective because it saves money on dental treatment needs.*

*Text adapted from "Nature's Way to Prevent Tooth Decay" pamphlet (American Dental Association) and the CDC Community Water Fluoridation

Learn More About Water Fluoridation

Information for Community Water Operators

  • CDC - Water Fluoridation Training Course - A free resource designed to build the capability of state fluoridation programs and to help increase knowledge and refine skills to implement and maintain community water fluoridation.
  • South Carolina Rural Water Association - The South Carolina Rural Water Association was established in 1976. "We are a non-profit trade association that assists public and private water/wastewater systems state-wide to ensure that the residents of South Carolina have access to clean water. We help deliver Quality on Tap!"

Another Source of Fluoride: Fluoride Varnish

  • Fluoride Varnish for Parents (pdf) - Why should your child get fluoride varnish on his/her teeth? This dual language flyer explains the importance of fluoride varnishes to preventing tooth decay.
  • Fluoride Varnish Training - This training is for medical providers and staff. It includes information about preventive oral health strategies and messages. A short assessment is included as well as a training completion certificate. Once the training is complete, providers are certified to bill for fluoride varnish applications.
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Health