Community fluoridation – considered one of the top public health success stories of the last century – has been banned in Utah, with a new law taking effect Wednesday.

Utah is set to become the first state in the nation to ban fluoride in drinking water, with a new law taking effect later this week, on Wednesday. That day, the fluoride taps will turn off, if they haven’t already.

As Utah prepares to stop fluoridating water in several systems, medical professionals are warning of the consequences and telling people how to keep their teeth healthy.