Sadly Wellington is already fluoridated, even though a bunch of us repeatedly make submissions to the city council against it. I did a submission to the parliamentary select committee a few months back too. We used to be able to get unfluoridated water from a couple of public taps in the Hutt Valley. But they were closed for a while due to an e-coli scare. So we ended up buying a WatersCo water filter which is supposed to take up to 99% of the fluoride out. Given that we have three whole house filters as well (@sift666 likes long baths), we're fairly confident that the end result has very little fluoride.

Going back to your previous comment about probiotic foods, we make our own caspian sea yoghurt and kefir. And have you tried the new Urban Monk fermented Ginger Carrots? Yummo!