Utah Code § 19-4-111: Prohibition of fluoride in public water systems.

(1) As used in this section, "fluoride" means a chemical compound that contains the fluoride ion and is used to fluoridate drinking water, including:

(a) fluorosilicic acid;

(b) sodium fluorosilicate; or

(c) sodium fluoride.

(2) A person may not add fluoride to water in, or water that will be introduced into, a public water system.

(3) A political subdivision may not enact or enforce an ordinance that requires or permits the addition of fluoride to water in, or water that will be introduced into, a public water system.