The sewer service charge for the use of and for service supplied by the sewer facilities of the city shall consist of a basic user charge, applicable surcharges, and debt service charge.
(A) The debt service charge is computed by dividing the annual debt service of all outstanding bonds by the number of users.
(B) The basic user charge shall be based on water usage as recorded by water meters for wastes having the following normal domestic concentrations:
(1) A five-day, 20°C biochemical oxygen demand (BOD) of 204 mg/1; and
(2) A suspended solids (SS) content of 240 mg/l.
(C) It shall be computed as follows:
(1) Estimate sewer volume, pounds of SS, and pounds of BOD to be treated;
(2) Estimate the projected annual revenue required to operate and maintain the sewer facilities
including a replacement fund for the year for all work categories;
(3) Proportion the estimated operation, maintenance, and replacement (OM&R) costs to each user class by volume, BOD, and SS;
(4) Proportion the estimated operation, maintenance, and replacement (OM&R) costs to sewer facility categories by volume, suspended solids, and BOD;
(5) Compute costs per 1,000 gallons for normal sewage strength; and
(6) Compute surcharge costs per pound per 1,000 gallons in excess of normal sewage strength for BOD and SS.
(D) A surcharge will be levied to all users whose waste waters exceed the normal domestic concentrations of BOD 204 mg/l and SS 240 mg/l. The surcharge will be based on water usage as recorded by water meters or sewage meters for all wastes which exceed the 204 mg/l and 240 mg/l concentration for BOD and SS respectively. The procedure to compute a surcharge is specified in § 53.081(B).
(E) The adequacy of the sewer service charge shall be reviewed not less often than annually by certified public accountants for the city in its annual audit report. The sewer service charge shall be revised periodically to reflect a change in operation and maintenance costs, replacement costs, and Reserve Fund costs.
(F) The capital improvement charge is levied on users to provide for capital improvements, extensions, or reconstruction of the sewage treatment works. The capital improvement charge is computed by apportioning the annual amount to be accrued as a charge per 1,000 gallons.
(G) The users of sewer treatment services will be notified annually, in conjunction with a regular bill, of the rate and that portion of the user charges which are attributable to the sewer treatment operation, maintenance, and replacement.
(Prior Code, § 38-4-77)