The American Dental Association position on Community Water Fluoridation
• All water, including lakes, rivers and the ocean, contains naturally occurring amounts of fluoride. If the natural level of fluoride in water is very low, public water systems may adjust it to an optimal level proven to help prevent tooth decay–approximately 1 part of fluoride dissolved in a million parts of water. This process is called community water fluoridation.
• Based on the weight of scientific evidence, which indicates that community water fluoridation can help prevent up to 40 percent of tooth decay, the American Dental Association remains a strong advocate for community water fluoridation. The World Health Organization, the American Medical Association, the Centers for Disease Control and Prevention as well as the ADA and many other health organizations acknowledge that water fluoridation is a public health measure that has contributed to a significant decline in dental decay over the past 70 years.