Interesting that everyone here seems to think fluoride in drinking water is such a huge health risk.
Apparently the WHO and many govts. have done an excellent job of covering up statistics of the cancer rates where chlorine is used as a disinfectant in water, compared to where it is not used.
Strange how studies that indicate a problem with someone deciding what is "best" for the masses, can become "lost" to the general public.
Here, in the States, chlorine has been used since the 1900s to disinfect water, and reached general use in almost all of the municipal water supplies by the late 40's to early 50's.
Have a look at the rate of increased cases of cancer of all types since 1900 in the US vs the use of chlorine in municipal water supplies.
Interesting set of curves.
Currently 94%+ municipalities in the US use chlorine in either gas or liquid form to "disinfect" drinking water.
And don't forget, it's not just "drinking water" that is the problem.
You bathe (soaking and absorbing through your skin) and showering (absorbing through the skin and inhaling fumes directly from the outgassing of hot water, and you wondered why hot water smelled different than cold).
Chlorine is, has, and will be continued to be used because it is the cheapest way to "disinfect" water, even though it is not 100% effective or the safest.
Chlorine has been listed (in all it's forms) as a known carcinogen since the early 30's in almost all "developed" countries worldwide.
Remember, with chlorinated water, we're not talking toxic shock or mass exposure, but long term low level exposure on a continuous basis.
Studies (legitimate and unbiased) on flourides in water are ambivilant at best and depending on where your drinking water is sourced from, the naturally occurring flourides in the water may be as high or even higher than those injected.
For the record, I am against fluoride injection in municipal water supplies and have a private well.
I have been constructing state, county, municipal, and private water treatment facilities for over 37 years, so trust me when I tell you, fluoride injection is not what you should be worried about.
(Just for fun, you might also try to find the studies that were done on the incidence of "hard" water vs kidney stones, if you want something else to worry about)