Effectiveness of Fluoride in Drinking Water

Much information about Fluoride in drinking water comes from the United States
The decline in tooth decay in the U.S. since water fluoridation began in the 1950s has been attributed largely to the fluoridation, and has been listed as one of the ten great public health achievements of the 20th century in the U.S. Initial studies showed that water fluoridation led to reductions of 50–60% in childhood cavities; more recent estimates are lower (18–50%), likely due to increasing use of fluoride from other sources, notably toothpaste, and also the halo effect of food and drink made in fluoridated areas and consumed in unfluoridated ones.
However the introduction of fluoride toothpaste in the  early 1970s has been suggested as the main reason for the decline in tooth decay since then in industrialized countries.

Most countries in Europe have experienced substantial declines in cavities without the use of water fluoridation, indicating that water fluoridation may be unnecessary in industrialized countries.

For example, in Finland and Germany, tooth decay rates remained stable or continued to decline after water fluoridation stopped.Likevaccination and food fortification, fluoridation presents a conflict between benefiting the common good and infringing on individual rights.

Fortunately you do have the right to install a domestic whole of house HomeGuard water filter that has the ability to remove Fluoride