If you favour your arguments to be from authority can I see your Professor of Chemistry and raise you (apologies for lack of brevity):
JOHN DOULL (Chair),
Professor Emeritus of Pharmacology and Toxicology
University of Kansas Medical Center, Kansas City
KIM BOEKELHEIDE,
Professor of Pathology
Brown University, Providence, RI
BARBARA G. FARISHIAN,
Professor of Dentistry
Washington, DC
ROBERT L. ISAACSON,
Distinguished Professor of Psychology
Binghamton University, Binghamton, NY
JUDITH B. KLOTZ,
Adjunct Associate Professor of Public Health
University of Medicine and Dentistry of New Jersey, Piscataway
JAYANTH V. KUMAR,
Director of Oral Health Surveillance & Research
New York State Department of Health, Albany
HARDY LIMEBACK,
Associate Professor and Head of Preventative Dentistry
University of Toronto, Ontario, Canada
CHARLES POOLE,
Associate Professor of Epidemiology
University of North Carolina at Chapel Hill, Chapel Hill
J. EDWARD PUZAS,
Professor of Orthopaedics; Biochemistry & Biophysics
Director of Musculoskeletal Research Unit.
University of Rochester, Rochester, NY
NU-MAY RUBY REED,
Lead Toxicologist
California Environmental Protection Agency, Sacramento
KATHLEEN M. THIESSEN,
Senior Scientist and Director
SENES Oak Ridge, Inc., Oak Ridge, TN
THOMAS F. WEBSTER,
Associate Professor and Associate Chair of Environmental Health
Boston University School of Public Health, Boston, MA
Marian S. McDonagh
Assistant professor of Medical Informatics and Clinical Epidemiology
Oregon Health & Science University
Penny F Whiting
Research Fellow
Department of Social Medicine
Bristol School of Medicine
Ivor Chesnutt
Professor and Hon. Consultant in Dental Public Health
Cardiff University
Mrs Jan Cooper
Principal Teaching Fellow
Warwick Medical School
Elizabeth Treasure
Professor of Dentistry & Vice Chancellor
Cardiff University
Jos Kleijnen
Professor and director of the Centre for Reviews and Dissemination
University of York
These are some (I got bored before finishing) of the authors of the reviews I posted linked to which conclude that water fluoridation is an appropriately safe and effective method of enhancing dental health.
I don't know why you would choose to trust Professor Connett over these other Professors.
He is both out-numbered and out of his specialty.
But I can't imagine anything I can say would change your mind.
And bearing in mind I claim no authority (we're all just folk here on mumsnet), I'd suggest you read the reports I linked to (here and here)if you want to find information on water fluoridation.