Cities and countries across the U.S. are moving to ban fluoride in public drinking water after Utah became the first state in the country to do so.

At Weber Basin Water Conservancy District, the slow removal of fluoride from their system poses particular challenges because it serves non-fluoridated water users in Weber County numbering about 300,000 people and Davis County, where residents there voted to add the substance to their drinking water. That is about 400,000 people.

Utah's governor intends to sign legislation making the state the first to ban fluoride in public water systems. Republican Gov.