One of the municipalities was thinking about fluoridating the water, so I got curious and looked up the toxicity LD 50/30 per kg body weight for fluoride.
The level of efficacy is not very far from the level of toxicity and a small error in dosage at a water treatment plant could cause dangerous problems.
I suggested that it might not be a good idea for public works to be administering medication to people en masse.
If people are worried about getting enough fluoride, take supplements where the dosage can be closely controlled.
I agree about medicating populations but the dosage in fluoride supplements is way higher than you can drink.