It shall be unlawful to discharge to any natural outlet within Clayton County, or the area under the jurisdiction of CCWA, any wastewater or other polluted waters, including septic tank effluent or cesspool overflow to any open drain or well-penetrating, water bearing formation, except where suitable treatment has been provided in the accordance with this ordinance.

(A) Prohibited Discharge Standards

  1. General Prohibitions. No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or any other National, State, or local pretreatment standards or requirements.
  2. Specific Prohibitions. No user shall introduce or cause to be introduced into the POTW the following pollutants, substances, or wastewater:
    1. Pollutants which create a fire or explosive hazard in the POTW, including, but not limited to, wastestreams with a closed-cup flashpoint of less than 140°F (60°C) using the test methods specified in 40 CFR 261.21;
    2. Wastewater having a pH less than 5.0 or more than 12.5, or otherwise causing corrosive structural damage to the POTW or equipment;
    3. Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference, but no case solids greater than one-half inch (0.5") in any dimension;
    4. Pollutants, including oxygen-demanding pollutants (BOD, etc.), released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with the POTW;
    5. Wastewater having a temperature greater than 150°F (65°C), or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104°F (40°C);
    6. Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through;
    7. Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute worker health and safety problems;
    8. Trucked or hauled pollutants, except at discharge points designated by the Manager in accordance with Sec. 98-7 (D) of this ordinance.
  3. Other Prohibitions. The following described substances, materials, waters, or waste shall be limited in discharges to the public sanitary sewers to concentrations or quantities which will not harm either the sewers, wastewater treatment process or equipment, will not have an adverse effect on the receiving stream, or will not otherwise endanger lives, limb, public property, or constitute a nuisance. CCWA may set limitations lower than the limitations established in the regulations below if, such more severe limitations are necessary to meet the above objectives. In determining acceptability, CCWA will consider the quantity of subject waste in relation to the flows and velocities in the sewers, materials or construction of the sewer, the wastewater treatment process employed, capacity of the wastewater treatment plant, degree of treatability of the waste in the wastewater treatment plant, the toxicity of the pollutant, its persistence, degradability, and other pertinent factors. The limitations and restrictions on the materials or characteristics of the wastes or wastewaters discharged to the sanitary sewer which shall not be violated without written approval of the Manager or his designated representative are as follows:
    1. Noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair;
    2. Wastewater that imparts color, which cannot be removed by the treatment process, such as, but not limited to, dye wastes, and vegetable tanning solutions, which consequently imparts color to the treatment plant's effluent, thereby violating CCWA's NPDES or LAS permits;
    3. Wastewater containing any radioactive wastes or isotopes except in compliance with applicable State or Federal regulations;
    4. Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the Manager;
    5. Sludges, screenings, or other residues from the pretreatment of industrial wastes;
    6. Medical wastes, except as specifically authorized by the Manager in a wastewater discharge permit;
    7. Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test;
    8. Detergents, surface-active agents, or other substances which may cause excessive foaming in the POTW or in concentrations greater than one hundred (100) mg/l;
    9. Fats, oils, or greases of animal or vegetable origin in concentrations greater than two hundred (200) mg/l;
    10. Wastewater causing two readings on an explosion hazard meter at the point of discharge into the sewer, or at any point in the POTW, of more than ten percent (10 %) or any single reading over ten percent (10 %) of the Lower Explosive Limit of the meter;
    11. Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment process employed, or are amenable to treatment only to such a degree that the wastewater plant effluent can not meet the requirements of other agencies having jurisdiction over the discharge to the receiving waters.
    12. Water or wastes containing taste and odor producing contaminants in such quantities that after treatment of sewage these contaminants impart their taste and odor to receiving waters.
    13. Any contaminant that is harmful to the operation or efficiency of wastewater treatment plants, or to the health and welfare of the residents of Clayton County.
    14. Ground paper products shall be prohibited from discharge to the sanitary sewer.
    15. Discharges of materials or substances that would cause the effluent quality from wastewater treatment plants to violate state and federal standards.
    16. Total Residual Chlorine in concentrations of greater than four (4) mg/l, unless agreed upon by the Manager to allow a higher limit based on demand in sewer collection system.
  4. If any water or wastes are discharged or are proposed to be discharged to the public sewers, which contain the substances identified in Section 98-6 (A) 1, 2 or 3,and which may have a deleterious effect upon the wastewater treatment facilities, processes, equipment or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the Manager may:
    1. Reject the wastes,
    2. Require pretreatment to an acceptable condition for discharge to the public sewers,
    3. Require control over the quantities and rates of discharge, and/or
    4. Require surcharge payment to cover additional cost of handling and treating the wastes not covered by existing taxes or sewer charges.
    If the pretreatment or equalization of waste flows is allowed, the design and installation of the plants and equipment shall be subject to the review and approval by CCWA. An owner or operator of any source to which the pretreatment standards are applicable shall comply with 40 CFR Part 403, as the same may be, from time to time, amended or replaced.
  5. Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW.

(B) National Categorical Pretreatment Standards

The categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405-471 are hereby incorporated.

  1. Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, CCWA may impose equivalent concentration or mass limits in accordance with 40 CFR 403.6(c).
  2. When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, CCWA shall impose an alternate limit using the combined wastestream formula in 40 CFR 403.6(e).
  3. A user may obtain a variance from a categorical pretreatment standard if the user can prove, pursuant to the procedural and substantive provisions in 40 CFR 403.13, that factors relating to its discharge are fundamentally different from the factors considered by EPA when developing the categorical pretreatment standard.
  4. A user may obtain a net gross adjustment to a categorical standard in accordance with 40 CFR 403.15.
  5. Where CCWA's wastewater treatment system achieves consistent removal of pollutants limited by National Categorical Pretreatment Standards, CCWA may apply to the approval authority for modification of these specific limits. "Consistent removal" shall mean reduction in the amount of a pollutant or alteration of the nature of a pollutant by the wastewater treatment system to a less toxic or harmless state in the effluent which is achieved by the system in ninety-five (95) percent of the samples taken when measured according to procedures set forth in 40 CFR Part 403, Sec. 403.7 (c)(2). CCWA may then modify pollutant discharge limits in the National Categorical Pretreatment Standards if the requirements contained in 40 CFR Part 403, Sec. 403.7 are fulfilled and prior approval from the Georgia Environmental Protection Division is obtained.

(C) State Pretreatment Standards

State pretreatment standards located at Chapter 391-3-6-.08 of Georgia Rules and Regulations for Water Quality Control are hereby incorporated.

(D) Local Limits

The following pollutant limits are established to protect against pass through and interference. No person shall discharge wastewater containing in excess of the following instantaneous maximum allowable discharge limits (mg/l):


1. Arsenic 0.2818 12. Zinc 4.9591
2. Cadmium 0.0321 13. Ammonia 150
3. Chromium 11.0295 14. BOD 3000
4. Copper 0.3184 15. Total Phosphorous 13.35
5. Cyanide 0.2473 16. TSS 4500
6. Lead 0.0778 17. Benzene 0.3618
7. Mercury 0.0014 18. Toluene 1.7504
8. Molybdenum 0.7241 19. Ethylbenzene 1.0553
9. Nickel 4.74 20. Total Xylene 18.7432
10. Selenium 0.2528 21. Total PAH 0.4865
11. Silver 6.1425


The above limits apply at the point where the wastewater is discharged to the POTW. All concentrations for metallic substances are for "total" metal unless indicated otherwise. The manager may impose mass limitations in addition to, or in place of, the concentration-based limitations above.

(E) Right of Revision

CCWA reserves the right to establish, by ordinance or in wastewater discharge permits, more stringent standards or requirements on discharges to the POTW.

(F) Dilution

No user shall ever increase the use of process water, or in any way attempt to dilute a discharge, as a partial or complete substitute for adequate treatment to achieve compliance with a discharge limitation unless expressly authorized by an applicable pretreatment standard or requirement. The Manager may impose mass limitations on users who are using dilution to meet applicable pretreatment standards or requirements, or in other cases when the imposition of mass limitations is appropriate.