§ 62-183. Rates based on water usage, strength of discharge.

(a)

The sewage rates and charges shall be based on the quantity of water used on or in the property or premises subject to the rates and charges, as the same is measured by the water meter there in use, except as herein otherwise provided. Water meters and/or remote read heads shall be read once each month (or a period equaling one month), and sewage service bills shall be rendered once each month (or a period equaling one month).

(b)

In order that the rates and charges may be justly and equitably adjusted to the service rendered, the city shall have the right to base its charges not only on volume but also on the strength and character of the wastewater which it is required to treat and wastes it is required to dispose of. The city shall have the right to measure and determine the strength and content of all wastewater discharged, either directly or indirectly, into the POTW, in such manner and by such method as it may deem practicable in the light of the conditions and attending circumstances of the case, in order to determine the proper charge.

(c)

If the character of the wastewater of any user as determined by the superintendent shall be such as to impose a burden upon the POTW, then an additional charge or surcharge as determined by the authority shall be charged such user over and above the regular service charge, or the superintendent shall require that such wastewater be treated by the user responsible before being emptied into the system. If necessary to protect the system, or any part thereof, the superintendent shall deny the right of the user to empty such wastewater into the system. (Surcharges required by this section shall be computed as the prorated share of the annual cost of the operation and maintenance, including replacement attributable to treating a substance multiplied by the ratio of the weight of the surchargeable excess of the discharged substances to the total weight of such substances that is treated in that year).

(d)

The surcharges to be charged for the treatment of extra strength sewage shall be determined by the following table. The surcharge shall become effective should the concentration of Carbonaceous BOD5 (biochemical oxygen demand), TSS (total suspend solids), P (phosphorus) or N-NH3 (ammonia nitrogen) exceed the concentrations listed in [section] 62-147(8). The surcharge shall be charged for each pound of the particular pollutant in excess of these concentrations.

Phase One effective upon passage of the amending rate ordinance; Phase Two effective January 1, 2018; Phase Three effective January 1, 2019; Phase Four effective January 1, 2020; Phase Five effective January 1, 2021 in the amounts as follows:

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Pollutant	Phase One	Phase Two	Phase Three	Phase Four	Phase Five
cBOD5	$0.430	$0.443	$0.492	$0.536	$0.539
TSS	0.370	0.381	0.423	0.461	0.463
P	10.352	10.662	11.834	12.899	12.963
N-NH3	1.253	1.290	1.432	1.561	1.569

 

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(e)

To determine the strength of the wastewater, grab or composite sampling and analysis may be made by the authority; billing adjustments with respect to the corresponding surcharges will then also be made.

(f)

The determination of suspended solids, five-day carbonaceous biochemical oxygen demand, phosphorus and ammonia nitrogen contained in the wastewater shall be in accordance with the procedure set forth in 40 CFR 136 Guidelines Establishing Test Procedures for the Analysis of Pollutants.

(Ord. No. 5265, § 2, 8-2-2010; Ord. No. 5568 , § 1, 3-6-2017)