As an industrial water treatment specialist this is far more plausible than you can even imagine. Consider the FDA has just authorized Remdesivir as the ONLY Covid19 treatment including for children. This, this is the protocol for all hospitals to follow.
Now imagine your EPA who oversees federal safe drinking water standards simply mandating another ‘additive’ [such as fluoride] to be used effective Jan 2019 etc and viola...! They could even place the additive into something like ammonium sulfate, which is something most every municipal water treatment facility uses already for microbial control.

Now, is this being done? I have no idea and it would seem far-fetched to me but who knows? What would be far simpler is to do this perhaps into a bottled water company that you control. When I watched the documentary the first thing I thought about was that crazy meeting where Trump was fumbling around 2-handed with that bottle of Fiji water that the media crucified him over. Remember how he was drinking it with both hands and not really holding it, but clamping it between his hands?

This movie is getting crazier by the day and I don’t know what to believe anymore, except that Jesus is my Lord and Savior and I must trust HIS plan.