Silicoflourides are commonly used to flouridate municipal drinking water. Unfortunately they are associated with higher levels of substance abuse, crime and learning abilities, possibly as a result of increased lead absorption in the body :(. - Sanjeev Singh

Luckily my municipal water company does not flouridate my water. Unfortunately, the ground water source they use already has flouride in it, of unknown form. - Sanjeev Singh

Flouridation started for San Francisco in 2005! I wonder if I should be worried. Thanks for this, Sanjeev. - Mona Nomura

Mona, if you're worried about flouride, some water filters can get it out of your water. Brita doesn't, but some others might. - Sanjeev Singh