Add Yahoo as a preferred source to see more of our stories on Google. FILE PHOTO: Tap water comes out of a faucet in New York, June 14, 2009. Jan 28 (Reuters) - The U.S. Environmental Protection ...

BUFFALO, N.Y. ­— In 1945, Grand Rapids, Michigan, became the first city in the world to add fluoride to its drinking water. Five years later, U.S. federal officials endorsed water fluoridation, with ...