The important role of fluoride in the prevention of dental caries is evident and turns the water fluoridation into a public health measure. The fluoride level supplied in water can vary from 0.7 to 1.0 ppm, depending on the seasons of the year (11). Thus, as the ambient temperature gets warmer, the water intake increases, requiring lower levels of fluoride in drinking water. Fluoridated water is, directly or indirectly, responsible for 40% of dental fluorosis, through water intake or children’s formula and food prepared with drinking water. The other 60% are attributed to other sources of fluoride (12).