According to the CDC
Fluoridation of drinking water began in 1945 and in 1999 reaches an estimated 144 million persons in the United States. Fluoridation safely and inexpensively benefits both children and adults by effectively preventing tooth decay, regardless of socioeconomic status or access to care. Fluoridation has played an important role in the reductions in tooth decay (40%-70% in children) and of tooth loss in adults (40%-60%)
According to the World Health Organization
The importance of effective use of fluoride for the prevention of dental caries has been emphasized in World Health Assembly Resolutions (3-5). A WHO Expert Committee Report on fluorides and oral health published in 1994 (6) detailed the scientific evidence available for use of fluoride and the recommendations for its use in public health programmes. The World Oral Health Report (2003) (2) further underlined the need for integrating oral disease prevention with national and community health programmes based on common risk factor approaches, and incorporating fluoride programmes for the prevention of dental caries.
From Dental and Oral Health Services, Toronto Public Health
The study that gives the greatest indication of what might happen in Toronto if water
fluoridation is discontinued, is a study conducted in British Columbia, Canada. This study
found that removing water fluoridation led to an increase in dental caries compared to the
fluoridated control site. This relationship was determined for both the prevalence and
incidence of caries when other risks were controlled. Over the three years of the study,
14 year olds from the site where fluoride was discontinued, acquired 2.29 cavities
compared to 1.82 in the site that was still fluoridated (7).
If Toronto discontinues water fluoridation, it is incumbent on the Toronto Board of
Health and Toronto City Council to ensure that sufficient funds are allocated to implement
a comprehensive, preventive and treatment dental program for all Toronto children to
reduce the likelihood that the oral health of Toronto’s population will deteriorate.
However, the scientific evidence and Toronto’s experience of fluoridating water for the
last 44 years, show that water fluoridation is a safe, economical and effective oral health
preventive measure that has resulted in improved oral health for Toronto’s population.
And there were many more sources that I know I can trust.