Missouri Revised Statutes Title XL. Additional Executive Departments § 640.136. Fluoridation modification, notification to department and customers, when

1. Any public water system, as defined in section 640.102, or public water supply district, as defined in chapter 247, which intends to make modifications to fluoridation of its water supply shall notify the department of natural resources, the department of health and senior services, and its customers of its intentions at least ninety days prior to any vote on the matter. The public water system or public water supply district shall notify its customers via radio, television, newspaper, regular mail, electronic means, or any combination of notification methods to most effectively notify customers at least ninety days prior to any meeting at which the vote will occur. Any public water system or public water supply district that violates the notification requirements of this section shall return the fluoridation of its water supply to its previous level until proper notification is provided under the provisions of this section.

2. In the case of an investor-owned water system, the entity calling for the discussion of modifications to fluoridation shall be responsible for the provisions of this section.