Windsor (ON) decided to start adding it back in for public health reasons:
> According to the latest oral health report[1] from WECHU, the percentage of children with "decay and/or requiring urgent care" in 2016/2017 increased by 51 per cent compared to 2011/2012.
> "The most alarming trend was the three-fold increase in the proportion of children eligible for topical fluorides," the report reads.
This is contorted. But even if it was true: I’m pretty sure the cost of repairing caries significantly outstrips the cost (both to you and your insurance) for regular checkups.
The point is about municipal water. I don’t have to (and in fact don’t) believe that the ADA is a virtuous organization to observe that there is no financial benefit to their support for fluoride in municipal water supplies. Less fluoride in the water means more money for them.