“The three types of filters that can remove fluoride are reverse osmosis, deionizers (which use ion-exchange resins), and activated alumina. Each of these filters should be able to remove about 90% of the fluoride. By contrast, ‘activated carbon’ filters (e.g., Brita & Pur) do not remove fluoride.”

According to the same source …

“Water distillation will remove most, if not all, of the fluoride.”

“When the water flows through an activated carbon filter, the odor-causing organic compounds become attracted to the filter’s carbon molecules, thanks to the weak forces between neutral molecules known as van der Waals forces. This process, in which organic molecules stick to the surface of the carbon, is called adsorption. In addition, activated chlorine removes chlorine from water by reacting chemically with it to form chloride ions.

“But activated carbon is not particularly good at removing salt, iron, or heavy metals such as mercury and lead from water.”

“Activated carbon is porosity (space) enclosed by carbon atoms.”