USC School of Dentistry cheers decision to fluoridate region's water

November 9, 2007

When the Metropolitan Water District (MWD) announced it would increase fluoridation levels to be on par with the majority of the country’s water supplies, it was a victory for oral health advocates who understand fluoride’s important role in maintaining good dental health.

For Eugene Sekiguchi, USC School of Dentistry associate dean for International, Professional and Legislative Affairs, it was an accomplishment representing more than a decade’s lobbying in support of the issue.

“This is a tremendous achievement and one that will significantly impact many regional municipalities,” Sekiguchi said. “It was a longtime coming.”

The MWD, a cooperative of 26 cities and water agencies in Southern California, supplies water to 18 million people in six counties from Santa Barbara to San Diego.

On Oct. 28, the MWD increased its fluoride levels from 0.1-0.4 parts per million to 0.7-0.8 parts per million, a level that both the California Department of Public Health and the U.S. Centers for Disease Control and Prevention (CDC) recommend for optimal dental health.

Sekiguchi was part of the statewide alliance of oral health experts who lobbied state and local legislators to increase fluoridation levels of municipal water supplies. Other members of the coalition included USC School of Dentistry Dean Harold Slavkin, faculty members Charlie Goldstein and Stanley Heifetz, and Tim Collins, dental director for the Los Angeles County Department of Health ervices.

Heifetz, a clinical professor in the school’s Division of Health Promotion, Disease Prevention and Epidemiology and resident expert on fluoridation practices, said California lagged far behind the rest of the nation in fluoridation of public water. In 2000, the CDC reported that less than 29 percent of the state’s population received fluoridated water. Only five other states had lower percentage numbers.

“California was pretty close to the bottom of the list when it came to fluoridation,” Heifetz said.

“This represents a sizeable increase,” Heifetz said. “We will definitely see a profound improvement in oral health in our communities.”

Fluoride is a naturally occurring mineral that helps teeth resist decay by strengthening the protective layer of tooth enamel. It also can reverse newly formed cavities.

Its health benefits have been touted since the 1940s when the first communities began fluoridating their drinking water, said USC School of Dentistry Dean Harold Slavkin. Data suggests that fluoridation can reduce decay by 30 percent, he said.

“In Los Angeles County, we have several million people without access to routine dental care, especially in the vulnerable populations of children and the elderly,” he said. “Fluoridation of drinking water can improve the quality of life of more than half a million people just in Los Angeles County alone.”

State legislators passed a bill in 1995 to fluoridate all of the state’s water, said Slavkin, “but without any financial support.”

When First 5 LA—a California initiative that funds services directed at children—approved a $20 million grant to water boards and municipalities to upgrade their fluoridation processes, it was the boon fluoridation advocates were seeking.

“Like immunizations against infectious diseases, fluoridation is an inexpensive and highly effective adjunct to reduce the prevalence of tooth decay,” Slavkin added.

The MWD estimates that the cost to increase fluoridation levels will amount to less than one dollar per family per year. But Sekiguchi said that could translate into much more saved by avoiding costly dental services.

“For every dollar spent in fluoridation, we’re talking about $38 saved in dental bills,” he said. “Few public health measures have such a favorable cost-benefit ratio. And in the end, we’re saving teeth and improving our region’s oral health.”