Fluoride is added to the water supply, because most people are dependent upon it. Their will be done.

Get the fuck off of their dependency systems as much as possible. Move out of the cities to a well system, where natural fluoride is present, or, if you must live in a city, multi stage your water system.

They do make systems that filter fluoride, but you have to intelligent enough to seek it out. The water companies won't mention it unless you ask for this type of filtration.