Click to Home
Go To Search
Urban Forest
San Jose Home
Water Fluoridation
boy drinking waterFluoridation is a safe, effective, and economical way to improve dental health for the entire community. Water fluoridation is the addition of small amounts of fluoride to a water supply to achieve a fluoride level that helps prevent tooth decay.

Fluoride, one of the most plentiful elements on earth, is a naturally occurring element found in rocks, soil and water. San José Municipal Water System (Muni) customers supplied with groundwater may receive trace amounts of naturally occurring fluoride.

When fluoride is added to drinking water to optimal levels as set by California’s Division of Drinking Water, it has been shown to promote oral health by preventing tooth decay. The fluoride levels in the treated water are maintained within a range required by state regulations.

California's fluoridated Drinking Water Act, Assembly Bill 733, became law in 1995, requiring water systems with 10,000 or more service connections to fluoridate once funding is available.

Where Supplemental Fluoridation Occurs
Evergreen Service Area
The Evergreen community approved fluoridation in the early 1960’s with an advisory vote. Shortly thereafter, Muni began adding fluoride to the treated water received from the Santa Clara Valley Water District (District), who is the wholesale water provider for the Evergreen service area and other water utilities throughout Santa Clara County.

In November 2011, the District Board of Directors adopted a policy to provide optimal levels of fluoride at its three water treatment plants in San José. The Santa Teresa Water Treatment Plant, which primarily supplies the Evergreen service area, will be the first to go online by December 2016, while the Penitencia Water Treatment Plant is expected to be completed in early 2017. The third, Rinconada Water Treatment Plant, will begin fluoridating in 2020. Therefore, after more than 50 years since Muni began fluoridating the Evergreen water supply, the District will take on that responsibility.

North San José/Alviso Service Area
San Francisco Public Utilities Commission (SFPUC) is the wholesale water provider for the North San José/Alviso service area. In 2005, SFPUC implemented system-wide fluoridation to the regional distribution system, which includes Muni’s North San José/Alviso area.

Contact Information
A special toll free number has been set up by the State of California Department of Public Health to answer your questions about fluoride in drinking water. Please direct inquiries about fluoride to 1-844-435-8420, or to your health care provider.

Fluoridation Information Links