Wyo. Stat. § 15-7-703
The corporation receiving the franchise to construct and maintain waterworks shall establish a schedule of prices to be charged for the use of water by consumers. The governing body shall revise or amend the schedule, if necessary, so that the charges are not unreasonable or oppressive. In establishing the water rates the governing body shall take into consideration the cost of construction of the water plant and adjust the rates to be charged upon a basis equitable to all parties. The schedule of prices agreed upon by the governing body are the prices that the corporation may charge and receive for the use of water within the corporate limits. The schedule of prices when fixed is not subject to revision more often than once every two (2) years without the permission of the corporation. The governing body has full authority to collect all water rents and charges due from consumers.
W.S. 15-7-703