Relating to the duty of a public water supply system to provide certain information to consumers regarding fluoride in drinking water.

HB 3429 requires public water systems that add fluoride to drinking water to disclose three specific measurements on customer bills: the natural fluoride level in the water, the amount of fluoride added, and the total combined amount. This disclosure must be accurate for water distributed within the past week. The law applies only to water systems that add fluoride and takes effect for bills issued after September 1, 2025. It directly affects consumers receiving fluoridated water by providing clear, itemized fluoride information on their bills.