I used to be in charge of a public water supply system. We were not required, but strongly encouraged, to add fluoride to our water. A few years before I left the state regulators recommended we reduce the fluoride levels, which we did. The reason given for that recommendation was that people don’t need it because they get enough fluoride from other sources, especially toothpaste.
Adding fluoride to drinking water has always been controversial. I would get one or two phone calls per year from customers imploring that we stop using it.
Since you used to be in charge of a public water supply system perhaps you know the answer to this question.
Are large cities more likely to have fluoride added to their water supply when compared with rural areas and small towns?
If so, perhaps adding fluoride to the water causes not just lower IQs but also more violent behavior.
My Mother led the fight in the early 60s to stop it,m lost out to the smarmy local Dentists. The ones who complained were the ones that did such s shoddy job on my teeth that I have had 3 crowns in the last 6 weeks.