Apparently it's causing white spots on teeth.
Story here:
http://www.theguardian.com/environment/2015/apr/27/fluoride-levels-us-drinking-water-lowered-splotchy-teeth
Not mentioned: the fact that fluoride cuts through concrete and the studies showcasing a lowering of IQ and ineffectiveness of doing anything to help teeth when ingested ... topical is a different story.
Currently over 70% of Americans get fluoride in their water. And that's not counting soda and beer.
There have long been claims of a cancer relationship to the chemical..
And now the government is taking it down a notch.
Because of white spots of course. Not that other stuff..