Water filters use mechanical filtration by pore size and chemical filtration to neutralize specific chemicals.

“What I mean by that is when you run a fluid water or any other fluid through a filter, those filters are doing two things. They are physically constraining which molecules can go through by creating portals, pores that allow certain size molecules to go through and not others. And almost always, they contain certain chemicals themselves, right? Those filters have been treated with certain chemicals that neutralize certain other chemicals.”