The crucial factor for me and my family is how much flouridated water prevents tooth decay and how many dentists I've ever been to have strongly endorsed it, which is all of them. The small percentage of people that have a bad reaction can drink bottled water.
2. It cost (my state) 15 million dollars just to install it, and maintain the equipment. In about every fourteen years, the equipment has to be replaced. This costs $1,000,000 a year for every county who has it in their water systems.