Voters in Kennebunk, Kennebunkport, and Wells Water District in Maine; Healdsburg, California (Sonoma County); and Greenville, Texas went to the polls on November 8 to voice their views on whether to ban fluoride in their drinking water.
Fluoride was added to the U.S. water supply purportedly to ward off cavities. However, research suggests that water fluoridation does nothing to improve dental health. In fact, according to the World Health Organization (WHO), countries with fluoridated water do not have less tooth decaythat non-fluoridated countries. 
Furthermore, 40% of American teens show signs of fluoride over-exposure, or dental fluorosis. Fluorosis is a tooth enamel defect that makes the teeth look like they are covered in cloudy spots and streaks. In more severe cases, fluorosis results in brown stains and tooth erosion.