http://www.fluorideaction.org/statement.august.2007.html

“Despite over 60 years of fluoridation, the report listed many basic research questions that have not been addressed. Still, the panel reviewed a large body of literature in which fluoride has a statistically significant association with a wide range of adverse effects. These include an increased risk of bone fractures, decreased thyroid function, lowered IQ, arthritic-like conditions, dental fluorosis and, possibly, osteosarcoma.

7. The admission by federal agencies, in response to questions from a Congressional subcommittee in 1999-2000, that the industrial grade waste products used to fluoridate over 90% of America’s drinking water supplies (fluorosilicate compounds) have never been subjected to toxicological testing or FDA safety-tested approved for human ingestion ”

There is a vast amount of literature concerning the problems with fluoridation, and amazingly, much is in U.S. Government documents.  A senior scientist with EPA, gave me direction back in 1992, he recommended asking the local utilities department for the standard for the type fluoridation agent to be used in our drinking water.  I followed his suggestion and when I received the standard and as important, the ‘specifications’ page. 
I have since collected a virtual library of data that is, to say the least, frightening.  The source as it happens is right across Tampa Bay in Hillsborough and Polk Counties: the phosphate fertilizer industries.  Then, the Florida Institute of Phosphate Research report 2003-2004, noted that there is uranium as well as fluorine in the ore.  It is crushed, treated with sulfuric acid, with wet scrubbers that collect those gases and then goes into ponds.  Called fluorosilicic acid (H2SiF6), this is used in 95% of public drinking water systems (ref. CDC Fluoridation Facts). 
The government documents are:
“Toxicological Profile for Fluorides, Hydrogen Fluoride, and Fluorine (F)”, 1993. 
“Health Effects of Ingested Fluoride”, 1993, National Academy of Sciences report for Congress.

Other date:
“Journal of Dental Research”, Special Issue, Worldwide Symposium on Fluorides, Vol. 69, Feb. 1990.
“The Merck Index”, 1996 and later editions. Gives chemical formulas for all fluoride-containing products and more. Some important ones are the Fluoroquinolones, the antibiotics of which there are some 28, including the well-known Cipro (Ciprofloxacin).  These antibiotics have been used in farm animals in low levels, not for their health, but to make them gain weight.  This has resulted in our diets containing low levels and the buildup of bacteria resistance.

And then there is the organic fluorides as Teflon and Scotchgard, now being phased out because it is being found in almost everyones body.  The report above; Health Effects of Ingested Fluoride, page 129, noted that they are concerned that it is unknown if it will interact with the fluoridation agents that are inorganic.

The latest concern is the substitution of chloramine for chlorine disinfectant.  In Neurotoxicology, Sept. 28, 2007: “Effects of fluoridation and disinfection agent combinations on lead leaching from leaded-brass parts”.  The abstract noted that the chloramine, a combination of chlorine and ammonia, and fluorosilicic acid (FSA) spiked a 900ppb of lead leaching.

And there is so much more.....even used to enrich the isotopes of uranium to Uranium Hexafluoride (UF6) and Sarin and Soman chemical warfare gases.

It seems rather foolish to put fluoride in water to treat peoples teeth when most of the people who drink water, drink bottled water which has all the chemicals removed. Very little water is actually consumed.

The last time I was at my dentist they asked me if I wanted a bottle of water. I asked them if it had fluoride in it and they said no. This is a dental clinic that vigorously promotes water fluoridation!