I don't know a thing about flouride, but I imagine a dentist- like Spider- would be pretty well informed on the subject.
Speaking of conspiracy theories, I wonder if bottled water companies have a hand in some of the anti-flouride theories?
This entire debate is why I drink nothing but beer. Even the Illuminati wouldn't dare taint the elixir of life!
A small town near seattle is trying a new form of water treatment USING NO chemicals ; instead the water is being treated with Ultra violet light . The town expects to save so much money that rates will be lowered to consumers-reportedly the UV light prevents the cells from multiplying thus killing all bacteria.
I'll check back on the town in a few months and see if an outcrop of mutants are being formed or if this works.
However, it does nothing to purify the water to remove sediment, dead bacteria, etc. The glass of water shown in the above post would look exactly the same after UV treatment.
I don't know much about industrial waste water treatment, but i would have thought that it is not a chemcially intense process. I would have thought it relies mostly on Filtration.
I use UV all the time when I'm backpacking or climbing. However like ODH said it won't affect the flavor or take out any particles. In general if I'm going hiking somewhere that I can get good clean water (glacier run off, high mountain lakes, quick running streams, or if I have to melt snow) I'll use my UV stick. However if I am going to be getting my water from more "interesting" sources then I'll take my MSR (filter). I can't imagine that they'll JUST use UV. I'm sure that they'll use some sort of a small (less than a micron) filter or something else to take out the particles that are floating.