www.insideHALTON.com · OAKVILLE BEAVER Friday, October 28, 2011 · 14 Fluoride amounts in our water supply are not excessive potable water at the tap, from ground and surface source. Variability, average over approximately 10 years, from 0.026 mg/l to 1.968 mg/l. -- an easy calculation, parts per million equivalent 0.26/1.968 ppm -- a startling maximum gives 2.57 mg/l. Research over the past 60 plus years starting with Texas Teeth in certain areas found to be mottled, but sound in all other respects, brought an awareness of excessive fluoride in drinking water in some areas as the culprit. Today, after copious and ongoing research, a suitable trade-off between dental caries (cavities) and fluorosis for a controlled optimal amount as a topical application in drinking water for a lifetime, occurs around 0.7 mg/l. Change, reduction, in the optimal amount has occurred over the years due ongoing research and awareness of market changes such as fluoride toothpaste (c.1960), food/drink processors using municipal fluoridated water, miniscule trace amounts in pharmaceuticals Need more be said? Fluoride in Halton's drinking water is presently 0.7 mg/l. Keep it that way. Ivor Davies, Oakville www.mentorcollege.edu www.teamschool.com Open House Saturday November 5 Mentor (JK - Grade 12) 9:30-12:00 TEAM (Grades 1-12) 10:00-1:00 Leading by example. Inspiring excellence. Busing available throughout Oakville