Generally speaking I see fluoridation as a ridiciulous idea, on the grounds that the vast majority of tap water ends up being used for things other than brushing your teeth. It is wasteful and damaging to the environment, that excess flouride that has no business being there ends up in the drain, or the water you use for your plants.
Flouride should be put in the toothpaste. Then people can make a choice on whether they want it, but most importantly, its in the only product that is actually used for brushing teeth