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N.C. Department of Environment and Natural Resources

NC Department of Environment and Natural Resources
Water Quality - Pretreatment

Water Quality

Pretreatment Program

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

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

2014 NCPC Annual Conference

Registration is open for the 2014 NC Pretreatment Consortium's annual conference to be held in Wrightsville Beach September 21st-23rd.  PERCS will be presenting the PT101 Workshop (located on our Training Page). 

Public Hearing for Triennial Review of Surface Water Standards 

More information may be found under Hot Topics on the Classifications and Standards Branch page.  Written comments are being accepted until 5pm on August 22, 2014.

August 30, 2011 - Sewer Use Ordinance (SUO) Checklist

This Model SUO includes many revisions to address the revisions to NCAC 15A 02H .0900 - Local Pretreatment Programs.  There are four 2006 Optional Changes in the model.  You may make the same choice as before or make a different choice at this time.  Updated draft SUOs were due to the Division by December 31, 2012.

All POTWs must include the Checklist for SUO updated August 2011 when submitting their SUO for review.  

State Pretreatment Regulations

The Rules were approved by the Environmental Management Commission (EMC) on January 13, 2011, and were approved by the Rules Review Commission (RRC) on February 17 and March 17, 2011.  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 401-471
  • October 14, 2005, Streamlining of the Federal Pretreatment Pretreatment Regulations -
    See the Other Downloads Webpage for:
    • Streamlining Guidance for NC Pretreatment Programs
    • Link to EPA Streamlining web-page.

Municipal Pretreatment Contacts in North Carolina

NC Pretreatment Program Staff contacts (Dec 2013)

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