Most City offices closed Wednesday, June 19, to observe Juneteenth

The City of Portland recognizes Juneteenth as a formal day of remembrance to honor Black American history and the end of slavery in the United States. Learn about Juneteenth.

17.34.030 General Discharge Prohibitions.

City Code Section

(Amended by Ordinances 172879, 180037 and 185397, effective July 6, 2012.)

  1. A.  It is unlawful to discharge industrial wastewater into the City sewer system except in compliance with this Chapter and rules adopted hereunder.
  2. B.  Prohibited discharges. It is unlawful to discharge, cause to discharge, or allow to discharge directly or indirectly into the City sewer system any substance, alone or in combination with others, that may inhibit, interfere with, injure, harm, damage, create a hazard to or impair the performance of the City’s conveyance, collection or treatment processes and systems. Prohibited discharges also include those that create or could create a nuisance or a threat to human health or the environment or that:
    1. 1.  Contains substances that are not amenable to treatment or reduction by the sewage treatment process employed or are only partially amenable to treatment;
    2. 2.  Contain liquids, solids, or gases which, either alone or by interaction, may cause a fire or an explosion or injure the sewer system or wastestreams;
    3. 3.  Have a closed cup flashpoint of less than 140 degrees Fahrenheit (60 degrees Celsius) using test methods prescribed at 40 CFR 261.21 or could cause the atmosphere in any portion of the sewer system to reach a concentration of 10 percent or more of the Lower Explosive Limit (LEL);
    4. 4.  Contain solids or viscous substances which may solidify or become discernibly viscous at temperatures above 0 degrees Celsius (32 degrees Fahrenheit) or are capable of obstructing the flow of wastewater or cause other interference with the operation of the sewer system;
    5. 5.  Contain noxious, malodorous or toxic liquids, gases, vapors, fumes, or solids, in amounts that may violate the general prohibitions of Subsection 17.34.030 B.;
    6. 6.  Contains hazardous or toxic substances, either alone or in combination with other substances may adversely affect receiving waters or in amounts that may violate the general prohibitions of Subsection 17.34.030 B.;
    7. 7.  Have a pH of less than 5.0 or more than 11.5 without prior approval by the Director;
    8. 8.  Are hotter than 65 degrees Celsius (149 degrees Fahrenheit) or are hot enough to inhibit biological activity or cause the temperature of the treatment plant influent to exceed 27 degrees Celsius (80 degrees Fahrenheit);
    9. 9.  Contain material trucked or hauled from a cesspool, holding or septic tank or any other nondomestic source, except such material received at designated locations under City contract or permit;
    10. 10.  Contain any material other than domestic waste larger than 0.65 centimeters (1/4 inch) in any dimension;
    11. 11.  Contain dissolved solids may violate the general prohibition of Subsection 17.34.030 B.;
    12. 12.  Contain excessive color which is not removed in the treatment process;
    13. 13.  Contain radioactive material, except in compliance with a current permit issued by the Oregon State Health Division or other state or federal agency having jurisdiction;
    14. 14.  Contain petroleum oil, non-biodegradeable cutting oil, or products of mineral oil origin in amounts that may cause interference or pass through;
    15. 15.  Contain non-contact cooling water without prior approval by the Director;
    16. 16.  May cause sewer system effluent or treatment residues, sludges, or scums to be unsuitable for reclamation and reuse;
    17. 17.  Constitute a slugload per administrative rule;
    18. 18.  Constitute a batch discharges without written permission from the Director;
    19. 19.  Exceeds discharge limits adopted in permits or administrative rules;
    20. 20.  May cause the City to violate the terms of its NPDES permit; or
    21. 21.  May cause the City to violate sludge use or disposal criteria, treatment guidelines, or other applicable regulations developed under the Clean Water Act (33 USC 1251-1387), the Solid Waste Disposal Act (42 USC 6901-6992k), the Clean Air Act (42 USC 7401 -7671q), the Toxic Substances Control Act (15 USC 2601-2692), or any other federal or state statutes.
  3. C.  A discharge or flow resulting from and emergency situation such as a water line break or fire fighting by the Fire Department shall not be prohibited from discharging to the sewer during the period of the emergency.  Any repairs made after the period of emergency has ceased will comply with all regulations of this Code.