I hope you will consider the following brief argument on the matter of fluoridation of your public water supply. I am a physician and scientist (biophysics). I have doctorates from Washington University School of Medicine (St. Louis) in medicine and the University of California (Berkeley) in biophysics. I studied at Rice Institute (Houston; now Rice University). I am a co-author of a 2010 book on fluoridation. I was born in Dallas.
Fluoridation of public water supplies has been for the most part a well-intentioned mistake. Its justification would be that it is ethical, safe and effective in prevention of cavities. It is now clear that it is none of these.

On effectiveness
It is generally accepted by health authorities and scientists that the necessary way to determine whether a procedure is safe and effective is by randomized control trials. No such trial exists for fluoridation as a preventive of cavities. The four early trials in the United States, Canada and New Zealand had faults varying from unacceptable methodology to outright fraud (fraud in the New Zealand case). And no good control study has been done—at least none have been published in the scientific literature. 
However, it has been observed on the basis of huge amounts of data that the occurrence of cavities does not decrease due to fluoridation. For example the World Heath Organization collected data from the early 1960s to 2004 from 18 industrialized countries. This data shows a steady decrease in prevalence of cavities in all 18 countries. But only four of those countries were fluoridated; fourteen were not. Clearly other changes, such as better diet and fluoridated toothpaste introduced in the 1970s were among the likely causes. Now it is generally accepted, even by promoters of fluoridation, that any protection of the teeth, minimal at best, is due to a topical action on the tooth enamel, not due to swallowing fluoride. The Centers for Disease Control and Prevention and the American Dental Association admitted this in 1999.
In contrast with the lack of demonstration of effectiveness there are many studies, published in peer-reviewed journals, that show that stopping fluoridation is not followed by an increase in incidence of cavities but rather by either no change or a reduction in incidence.

On safety
Though no general toxicological studies have been published on the chemicals used in fluoridation, there is an abundance of credible papers on particular toxic effects. Associations of fluoride exposure in drinking water with many adverse conditions have been observed. Defects in reproductive processes, in teeth, in bone, in neurological development, and in thyroid function are particularly certain. Others have been observed with less certainty. This variety of toxic effects is not surprising since fluoride is well recognized to interfere with the function of enzymes, the proteins that catalyze (accelerate) biochemical reactions in all tissues. Also fluoride interferes with signaling across cell membranes—for example, in the case of hormones—a process essential for cellular functions in all organs and tissues.

On ethics
The canons of medical ethics include strict conditions on what must accompany medical procedures. Some requirements are: informed consent, the option to stop the procedure, and monitoring of effects. None of these conditions are met in fluoridation of a public water supply. In fact, a council that implements fluoridation is doing what a physician or dentist can not do, which is to admnister a medicine without having examined the recipient, without having the consent of the recipient, and without observing the results. 
Ethics touches law here, but I hopefully leave that to your informed conclusions.
Let me add a few points not embedded in the above. (1) Fluoridation chemicals are medicines. They are administered to prevent dental caries (cavities), a disease. (2) Fluoride is not a nutrient. It is not essential or helpful to any biochemical, physiological, or developmental process of the human body. Consequently fluoride is not a dietary supplement. (3) Controlling the concentration of fluoride in a water supply does not control the dose a person gets. The dose is the amount per day and the amount of water individuals ingest varies hugely. (4) There are groups, large and small, in a population that are more sensitive to exposure to fluoride. These groups include infants, the elderly, people with kidney disease, diabetics, people with low-iodine diets and others. (5) There are ways to prevent cavities that are matters of free choice: a good diet including adequate vitamin D, good dental hygiene, and occasional professional care. Currently there exist public programs involving these measures that have been very successful.
Finally, if you have questions you would like to ask me, feel free to contact me by e-mail. I am willing and ready to say what references and consultations have led me to the conclusions that fluoridation is not safe, not ethical, and not effective.

James S. Beck, MD, PhD
Professor Emeritus of Medical Biophysics
University of Calgary
Calgary, Alberta, Canada