After examining more than 2.2 million cancer death records and 125,000 cancer case records in counties using fluoridated water, the researchers concluded that there was no indication of increased cancer risk associated with fluoridated drinking water. In 1993, the Subcommittee on Health Effects of Ingested Fluoride of the National Research Council conducted an extensive literature review concerning the association between fluoridated drinking water and increased cancer risk. The review included more than 50 human epidemiological studies and six animal studies. The Subcommittee concluded that none of the data demonstrated an association between fluoridated drinking water and cancer. A recent report by the Centers for Disease Control and Prevention supported these findings.
Web site has more information about drinking water and health.
It includes information about drinking water quality and standards. Results and conclusions of the National Toxicology Program's rodent carcinogenicity studies with sodium fluoride. Centers for Disease Control and Prevention. Public Health Service report on fluoride benefits and risks. Centers for Disease Control and Prevention.