In the event of the failure to pay any bill for sewerage collection within forty (40) days from the date rendered, there shall become due in addition to all other rates, tolls and charges then due a penalty of twenty five percent (25%) of the unpaid bill together with any and all costs of collection. In addition thereto, the city may disconnect any sewer line for nonpayment of sewer fees. (Ord. 323 § 5, 1985)