7-13-141. Charges for services. (1) The board of county commissioners shall have authority by ordinance or resolution to fix and establish just and equitable rates, charges, and rentals for the services and benefits directly or indirectly afforded by any sanitary or storm sewer system operated by, controlled by, and under the jurisdiction of a metropolitan sanitary and/or storm sewer district formed under this part.

(2) Such rates, charges, and rentals shall be as nearly as possible equitable in proportion to the services and benefits rendered and may take into consideration the quantity of sewage produced and its concentration and water pollution qualities in general and the cost of disposal of sewage and storm waters.