Fluoridation is not about "children’s teeth," it is about industry getting rid of its hazardous waste at a profit, instead of having to pay a fortune to dispose of it.
Only calcium fluoride occurs naturally in water; however, that type of fluoride has never been used for fluoridation. Instead what is used over 90 percent of the time are silicofluorides, which are 85 times more toxic than calcium fluoride.
They are non-biodegradable, hazardous waste products that come straight from the pollution scrubbers of big industries. If not dumped in the public water supplies, these silicofluorides would have to be neutralized at the highest rated hazardous waste facility at a cost of $1.40 per gallon (or more depending on how much cadmium, lead, uranium and arsenic are also present). Cities buy these unrefined pollutants and dump them--lead, arsenic and all--into our water systems. Silicofluorides are almost as toxic as arsenic, and more toxic than lead.1, 2
Excerpt from: Fluoridation: The Fraud of the Century