(A) If the character of the sewage of any manufacturing or industrial plant or any other building or premises shall be such as to impose any unreasonable burden upon the sewers of the system or upon the sewage treatment plant in excess of a maximum limit prescribed in this chapter, then an additional charge shall be made over and above the regular rates, or the local agency shall require that such sewage be treated by the person responsible therefor before being emptied into the sewer, or the right to empty such sewage shall be denied, if necessary, to protect the system or any part thereof. Surcharges required shall be computed as the prorated share of the annual costs of operation and maintenance, including replacement, attributable to treating a substance, multiplied by the ratio of the weight of surchargeable excess of the discharged substance to the total weight of such substance that is treated in that year. This amount shall be collected on the basis of estimated surchargeable amounts with each billing and shall be adjusted annually to reflect actual operation, maintenance, and replacement costs. If any premises connected to the system discharge a large portion of total water used into the storm sewer and not into the sanitary sewer, all such discharges shall comply with the requirements of state and federal agencies.
(B) Any wastewater discharged into the sewer system having a substance in excess of the limits prescribed in § 50.05 shall be permitted only if provided for in a special agreement with the industrial concern discharging the wastewater, and then only if such agreement provides for the payment by the industrial concern for the full cost of treating such excess constituents in the wastewater.
(Ord. passed 4-11-2019)