No risk
The Royal Society of New Zealand and the Office of the Prime Minister's chief science advisor have stated that there are "no negative health risks" from imbibing fluoridated water. Well, I hate to be a bore, but I have a chemical sensitivity to fluoride that was diagnosed by a practicing New Zealand GP.
While an allergy is an overreaction to harmless substances, and is curable, a chemical sensitivity is an overreaction to harmful substances and there's no cure, only avoidance.
I lived in fluoridated Wellington for over 20 years and developed a number of distressing symptoms that various health professionals put down to other causes, like age-related and psycho-sematic. My symptoms included skin rashes, severe itching, unpleasant digestive problems and joint and back pains. They all mysteriously cleared up during a short stay in fluoride-free Europe, and reappeared as soon as I got back.
The doctor told me that fluoride is the most powerful irritant to the human mucus membrane, and that 50 per cent of all fluoride imbibed lodges in the skeleton and organs while the rest is excreted to find its way into the ground water and air - you can check these facts. The last thing he said was, "You shouldn't even be bathing in the stuff".