Why increased tooth decay?

Is it true that we have no fluoride in our water despite two very large supply pipes coming across the Rip Bridge from the Terrigal coastal connection, and that the level of tooth decay is correctly reported to be increasing?

If so, wouldn't that indicate the alleged increase in decay problems is caused by some hidden variable?

Whatever the reason, it can have nothing to do with the community's continued consumption of healthy unfluoridated water, which has I understand remained a constant zero on the Peninsula, according to our council.

Edward James, Umina