Drinking Tap Water

When my son had his dental appointment, the dentist asked me if I let him drink water from the tap too. Not all the time I said, because we use purified water through an electric water dispenser. The thing is little children even adults need to drink water from the tap too as this water is added with fluoride to prevent tooth decay. Since I use tap water in cooking anyway, we still get fluoride that way. Adding fluoride in public water supply does not change the appearance, taste and smell of the water, so water filter is not even necessary.