Mo. Rev. Stat. § 204.700: No fee, charge, or tax to be assessed, when.

No person who owns real property that is used for residential purposes within the boundaries of any district created under Section 30 of Article VI of the Missouri Constitution shall be assessed any fee, charge, or tax for storm water management services if the district does not directly provide sanitary sewer services to such property and if the storm water runoff from such person's property does not flow, or is not otherwise conveyed, to a sewer maintained by such district.