7-13-4523. Fees -- determination of rates -- increases -- exemption for agricultural water use. (1) The commissioners shall determine fee rates according to a classification system that is based upon the volume of water withdrawn and the volume and type of waste produced at each fee-assessed unit in the local water quality district.

(2) Fees for commercial and industrial units must be based on a comparison with a typical family residential unit as to volume of water withdrawn and volume and type of waste produced. Commercial and industrial units may be assessed fees that are not greater than 50 times the fees assessed on a family residential unit.

(3) The commissioners may increase fees up to 10% a year by passing a resolution to establish the new fee rate. The commissioners may not approve a proposed fee increase of more than 10% a year unless notice of the proposed increase is given as provided in 7-13-4507(1) and (2) and opportunity for protest is provided as set forth in 7-13-4509 and 7-13-4510. If more than 20% of the owners of fee assessed units in the district protest, the fee increase may not be approved except through the referendum procedure provided for in 7-13-4512.

(4) Water withdrawals for irrigation and livestock use and related water discharges may not be assessed fees.