When property outside of the city is served by storm sewers, drainage ditches, drainage channels or pumping facilities, charges for such drainage services, filing of liens or other fees or charges covered in this chapter shall be payable at the rate of 150 percent of the applicable charge or rate for service within the city. (Ord. 1461 § 1 (Exh. 1), 2018; Ord. 1405 § 1 (Exh. 1), 2015; Ord. 1189 § 2, 2006; Ord. 563 § 6, 1981).