Many places put fluoride in tap water to prevent tooth decay. According to Mass Dental, many towns including sections of Boston like Belmont and Cambridge, still have fluoride in their water. However, there are many factors pointing against this practice.
The main argument for water fluoridation is that it prevents tooth decay. Looking at this graph, however, shows that countries without water fluoridation have achieved a decrease in tooth problems without this practice. So is this really necessary? Who really cares if it doesn't affect the health in a negative way, right? Well, there are studies that show that not only is this practice unnecessary, but harmful. According to Fluoride Alert, fluoride serves its best protection when used topically, not when it is ingested. Plus, too much of this fluoride can cause brain and bone problems as studied by a group of Harvard scientists. Fluoride itself is not even really good; fluoride supplements have never been approved by the FDA, who refers to fluoride as a drug.
Worst of all, water fluoridation is not something you can choose! It is put into tap water, which virtually every public place and home has. If you live in a place that has water fluoridation, you automatically have to ingest this fluoride through your water. How scary!