not sure why the downvote. It was a warning to those with their own private well. If you don't want fluoride, I was saying be sure and have your water tested for it. We moved to the country recently and they tested our well water before we bought the property, but I did not consider that it may have natural fluoride. I do not recall it being on the report when they tested the water. That's why I requested any well drillers out there that may have the answer as to if it is even tested for. Should be something one should know, I would think.