Rates for sewer services shall be as established in the schedules set forth in this chapter. The rate per month shall be comprised of a base monthly charge and a volume charge based on the metered volume of water consumption and the nature or strength of wastewater produced. The nature or strength of the wastewater produced will place each customer in one of five sewage strength classifications as set forth in LMC 14.40.015. All billing information will be accumulated bimonthly. Bimonthly billing will be used for all accounts. These rates and charges shall be in effect and assessed beginning January 1st of each year. (Ord. 2845 § 1, 2010; Ord. 2659 § 1, 2006; Ord. 2530 § 1, 2004; Ord. 1660 § 1, 1988; Ord. 147 § 16.01, 1963)