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Pretreatment Program

What is Pretreatment?

Pretreatment applies to treating wastewater containing pollutants prior to discharging the water into the Publicly Owned Treatment Works(PO

Publicly owned treatment works (POTWs) collects wastewater from homes, commercial buildings, and commercial & industrial facilities and transport it via a series of pipes, known as a collection system, to the treatment plant (Wolf Wastewater Treatment Plant).  Here, the POTW removes harmful organisms and other contaminants from the sewage so it can be discharged safely into the receiving stream.  Generally, POTWs are designed to treat domestic sewage only.  However, POTWs also receive wastewater from industrial (non-domestic) users.  The General Pretreatment Regulations establish responsibilities of Federal, State, and local government, industry and the public to implement Pretreatment Standards to control pollutants from the industrial users which may pass through or interfere with POTW treatment processes or which may contaminate sewage sludge.

Arizona Department of Environmental Quality (ADEQ) was given primacy over water quality regulations by the Federal Government Environmental Protection Agency (EPA).  ADEQ issued a wastewater discharge permit, called an AZPDES (Arizona Pollutant Discharge Elimination System), to the City of Avondale.  This permit gives the City numeric limits on the quality of treated water allowed to be discharged.

Industrial Pretreatment:

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Commercial Pretreatment also known as FOG (Fats, Oils, & Grease):

The main objectives of the Pretreatment Program:

  • Protecting drinking water supplies by reducing contaminants released into source waters by POTWs

  • Keep pollutants out of POTW that will interfere with its operation

  • Improve opportunities to recycle and reclaim wastewater and sludge

  • Preventing overflows that include raw sewage from sewers through controls on oil and grease

  • Protecting the community’s investment in wastewater infrastructure.

  • Worker safety by protecting workers from harmful fumes through limits on discharging dangerous gases and gas-forming substances
  • Homeland security by ensuring proper disposal of wastes & decontamination showers.

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Contact The Pretreatment Coordinator:
David Allred
Regulatory Compliance Coordinator, Pretreatment
Phone: (623) 333-4457