If anyone has questions about fluoride in your drinking water, just google Danger of Fluoride and see all the sites that come up warning of the REAL danger.  Check out the ones below for starters.  I personally do not drink tap water. Their are pros and cons.. but I believe the cons outweigh the claim that it is good for oral health.  Everyone should research this subject, because fluoride has serious health dangers.

http://www.mbschachter.com/dangers_of_fluoride_and_fluorid.htm,
http://www.fluoridealert.org/
http://www.nofluoride.com/