A note about fluoride:
1) Fluoride occurs naturally in surface and ground water, in many places in amounts well above US artificial fluoridation levels. It is the same simple F- ion in all these cases, no matter the originating elemental compound.
2) In 2015, which was during Obama's time in office, the US recommended levels of fluoride in drinking water were actually lowered.
Source: Wikipedia. I think the above makes a nice big hole in the anti-fluoride arguments that needs to be addressed by fluoride opponents (shills cooperating on a designated talking point?). I don't think Q was talking about fluoride when the told to watch the water.