Last updated on July 12, 2012 Water Fluoridation in the City of Waterloo - Frequently Asked Questions What is fluoride? Fluoride is a naturally occurring material found in water, plants, rocks, soil, air and most foods.
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Last updated on July 12, 2012 Water Fluoridation in the City of Waterloo - Frequently Asked Questions What is fluoride? Fluoride is a naturally occurring material found in water, plants, rocks, soil, air and most foods.