The CDC says fluoridation is among the 10 greatest public health achievements of the 20th century. Utah recently became the first state to ban it.

Florida is poised to become the second state to ban fluoride in public drinking water, over the concerns of dentists and public health advocates who say the mineral is a safe, effective way to protect people of all ages from developing cavities.

Removing the mineral could be costly in terms of health — and dental bills, if history is any guide. In 2011, the Canadian city of Calgary removed fluoride from its water after