Prohibited Discharges

The following information is provided as public service notice and as a means to enlighten you, our most valued and appreciated customer, of substances which are prohibited from being introduced into the Chester Sewer District (CSD) system. The South Carolina Department of Health and Environmental Control (DHEC) has issued a regulation against certain substances which are considered harmful to the environment and to Publicly Owned Treatment Works (POTW’s) such as CSD. Prohibited Discharges are as follows:


  • Any liquids, solids, or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction with other substances to cause fire or explosion or be injurious in any way to the POTW or to the operation of the POTW. Prohibited materials include (but are not limited to) gasoline, kerosene, naptha, benzene, toluene, xylene, ethers, alcohols, ketone, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides, and sulfides, and any other substances which are a fire hazard to the system.
  • Solid or viscous substances which may cause obstruction to the flow in a sewer or other interference with the operation of the wastewater treatment facilities such as (but not limited to) grease, garbages with particles greater than one-half inch in any dimension, animal guts or tissues, paunch manure, bones, haire, hides or fleshing, entrails, whole blood, feather, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste paper, wood, plastics, gas, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud, glass grinding, or polishing wastes.
  • Any wastewater having a pH of less than 5.0 or greater than 10.0.
  • Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the POTW, subject to the Water Quality Standards.
  • Any noxious or malodorous liquids, gases, or solids which either singly or by interaction with other wastes are sufficient to create a public nuisance or hazard to life or are sufficient to prevent netry into the sewers for their maintenance and repair.
  • Any substance which may cause the POTW’s effluent, or any other product of the POTW such as residues, sludges, or scums to be unsuitable for any reclamation or reuse process or program.
  • Any substance which will cause the POTW to violate its NPDES and/or State Disposal System Permit or the receiving water quality standards.
  • Any wastewater with objectionable color not removed during treatment process, such as (but not limited to) dye wastes and vegetable tanning solutions.
  • Any wastewater having a temperature which will inhibit biological activity in the POTW resulting in interference, but in no case, wastewater with a temperature which exceeds 150 Degress F (66C) for which causes the influent to the treatment plant to exceed 104 Degrees F.
  • 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 to the POTW. In no case shall a slug load have a flow rate or contain concentration of quantities of pollutants that exceed for any time period longer than fifteen minutes more than five times the average twenty-four hour concentration quantites, or during normal flow operation.
  • Any wastewater containing any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Commission in compliance with applicable State and Federal Regulations.
  • Any wastewater which poses a substantial present or potential hazard to human health or to the environment when improperly treated, stored, transported, disposed of, or otherwise managed or creates a public nuisance.
  • Any substance or flow quantity which causes a violation of the Permit to Discharge or the terms of a contract between the Commission and the discharger.
  • Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass-through.


Again, this information is being provided as a means to educate, to protect the environment, and to comply with CSD, State of South Carolina, and United States Federal pollution prevention rules and regulations. If you would like more detail on prohibited discharges, please contact us at (803) 385-5123 or stop by and visit us at 155 Wylie Street in Chester.