This has been true for several years now to the best of my understanding.

So long as other good oral health measures are firmly in place there should
be no increase seen in cavities.

The worst impact would be for those children who cannot see a dentist every year, and don't use fluoridated toothpaste or mouthwash daily, and have a poor diet, due to poverty or any other reason.

​http://windsorstar.com/news/local-news/windsor-votes-to-remove-fluoride-from-drinking-water