[jeffc]

We have well and septic. Haven’t had a cavity in years; in fact, not since I had to put up with “city” water.

[jeffc]

Also, I've always wondered how an amount of fluoride small enough not to be toxic would be enough to have any effect on tooth decay for the small amount of time it actually is in contact with teeth.

I do remember reading that fluoride is a by-product of manufacturing aluminum and the gub'mint didn't know what to do with all that fluoride getting dumped into our waterways, so they came up with the idea that it was "added" to help prevent tooth decay. What a hoot!!