Water fluoridation
Health and dental organizations worldwide have endorsed its safety and effectiveness. Its use began in 1945, following studies of children in a region where higher levels of fluoride occur naturally in the water. Further research showed that moderate fluoridation prevents tooth decay.
1961 Edmonton municipal election
Shall fluorides, for the prevention of tooth decay, be added to the City water supply sufficient to bring the fluorine content of City water up to a level of one part fluorine to one million parts of water?