(A) Sewer users served by water utility water meters. There is hereby levied and assessed upon each lot, parcel of land, building, or premises having a connection with the wastewater collection system and being served with water solely by the water utility, a sewer service charge based, in part, on the quantity of water used, as measured by the water utility water meter used upon the premises.
(B) Billable volume. The user charge assessed residential users and those users of other classes discharging normal domestic strength wastewater shall be established proportionately according to billable wastewater volume. Billable wastewater volume shall be calculated as follows.
(1) Residential users.
(a) Billable wastewater volume for residential users shall be calculated on the basis of metered water usage.
(b) The per monthly billable wastewater volume shall be equal to monthly metered water usage as averaged between the first and last quarters of the calendar year.
(c) The city may require residential users to install water meters for the purpose of determining billable wastewater volume.
(2) Non-residential users.
(a) The billable wastewater volume of non-residential users may be determined in the same manner as for residential users.
(b) Except that if the city determines that there are significant seasonal variations in the metered water usage of nonresidential users resulting in a proportionate increase or decrease in wastewater volume; then billable wastewater volume shall be:
1. Calculated on the basis of monthly metered water usage as recorded throughout the year; or
2. Calculated on the basis of wastewater flow meters.
(c) The city may, at its discretion, require nonresidential users to install additional water meters or wastewater flow meters as may be necessary to determine billable wastewater volume.
(1986 Code, § 403.04)