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Little boy drinking waterWater Fluoridation
Fluoridation 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, occurs naturally in water supplies. When fluoride is present in drinking water at optimal levels, it has been shown to promote oral health by preventing tooth decay. 

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
The Evergreen community approved fluoridation in the early 1960’s with an advisory vote. Shortly thereafter, San José Municipal Water System began adding fluoride to the treated water received from the Santa Clara Valley Water District, who is the wholesale water provider for the Evergreen service area.

In late 2005, San Jose Municipal Water System began supplying fluoridated water to North San José/Alviso residents when the San Francisco Public Utilities Commission (SFPUC) implemented system-wide fluoridation. SFPUC is the wholesale water provider for the North San José/Alviso service area.

Other Local Communities With Fluoridated Water
San Francisco residents and customers on the northern Peninsula have been receiving optimally fluoridated water since the early 1950s to promote dental health.

Several water districts or utilities deliver fluoridated water, including the City of Hayward, Alameda County Water District, City of Mountain View, City of Palo Alto, and Stanford University.