Otto, 

Immediately upon addition to drinking water, fluorosilicates (FS) completely hydrolyze (dissociate) into fluoride ions, identical to those which have always existed in water, and trace contaminants in barely detectable amounts far below EPA mandated maximum allowable levels.  After this point, the FS  no longer exists in that water.  It does not reach the tap.  It is not ingested.  It is, therefore, of no concern, whatsoever.

FS has not been approved by anyone as a "medical treatment".  They are not ingested.

The  relative toxicity of FS is irrelevant.  They are not ingested.

Calcium fluoride (CaF2) does not occur in groundwater.  "Naturally occurring" fluoride is fluoride ions leached from CaF2 and fluorosilicates in rocks as groundwater passes over these rocks. These "naturally occurring" F ions are identical to those released by FS during fluoridation. A  F ion is a F ion, regardless the source compound from which it is released.


Steven D. Slott, DDS