Toxic introductions in water....?

With much information recently on the levels of non-natural items coursing through our waterways from documented man-made sources - medications, hormones, birth control etc - stuff that we wash through our own bodies that ends up passing through treatment facilities and entering the river systems, there was little mention of what the effect of adding flouride to the Portland water system would have. This was somewhat surprising but was one item that seemed to be missing.In finally remembering to see if there was any effect - the embedded video [all 31 minutes of it] pops up on the internet....