The Federal and State Pretreatment Program gives regulatory authority for EPA, states, and municipal governments to control the discharge of industrial wastewater into municipal Wastewater Treatment Plants (WWTPs) or Publicly Owned Treatment Works (POTWs). The objectives of the Pretreatment Program are to prevent pass-through, interference, or other adverse impacts to the POTW, its workers or the environment; to promote the beneficial reuse of biosolids; and to assure that all categorical pretreatment standards are met. There are approximately 620 Significant Industrial Users (SIUs) who discharge industrial wastewater to more than 130 POTWs throughout the State of North Carolina.

The Pretreatment, Emergency Response and Collection Systems (PERCS) pretreatment staff periodically present the following workshops as a service to assist POTWs and their consultants.

  • Pretreatment Annual Report Workshops
  • Headworks Analysis Workshops
  • Permit Writing Workshops (Coming soon! See the Training Page for details)

See the Training Page for details, including links to EPA training opportunities.  

Sewer Use Ordinance (SUO) 

This Model SUO includes many revisions to address the 2011 revisions to NCAC 15A 02H .0900 - Local Pretreatment Programs.  

State Pretreatment Regulations

 The Rules are final and effective as of April 1, 2011.

Federal Regulations

  • General pretreatment regulations: 40 CFR 403 (July 2012)
  • Categorical Pretreatment Regulations: 40 CFRs 400-471
  • October 14, 2005, Streamlining of the Federal Pretreatment Pretreatment Regulations -
    See the Other Downloads Webpage for more information.

Municipal Pretreatment Contacts in North Carolina

NC Pretreatment Program Staff contacts (Dec 2016)