City of Glendale, AZ - Click here to go to the city home page

Skip Navigation Link

        Follow Your Money   RequestForService
Glendale, AZ
Glendale, AZ - Departments Glendale, AZ Glendale, AZ - Services Glendale, AZ - Glendale, AZ - City Officials Glendale, AZ Glendale, AZ - Residents Glendale, AZ Glendale, AZ - Visitors Glendale, AZ Glendale, AZ - Businesses Glendale, AZ Glendale, AZ - Online Services Glendale, AZ Glendale, AZ - Important Updates Glendale, AZ Glendale, AZ - Home Page
Glendale, AZ


Back to Utilities Home

Yellow Page Break Image

Pretreatment Program

Overview | Documents | Significant User Program | Pollution Prevention | Commercial Inspection | Regulations | Household Hazardous Materials | Related Links | Contact Information

Our Pretreatment Program is responsible for monitoring and controlling wastewater pollution from commercial and industrial sources within the City of Glendale. This opening page has links to more detailed information regarding the various areas of responsibility within our Pretreatment Program. To learn more about the different aspects of this program simply click one of the buttons on the left side of each page. Phone numbers and links to other governmental agencies, along with various water quality and environmental web sites, are listed on the “Related Links” page. If you have any questions, please call us at (623) 930-4779. We attempt to reply to all messages when appropriate.


The City of Glendale’s Pretreatment Program officially began in 1983 as a requirement of the U.S. Environmental Protection Agency. The 1972 Clean Water Act and the 1978 Federal General Pretreatment Regulations are the basis of this requirement. The five different municipalities discharging into the 91st Avenue treatment plant located in Phoenix were required to initiate a Pretreatment Program as a condition of the NPDES (National Pollutant Discharge Elimination System) permit issued to that facility. These five municipalities comprise the Sub Regional Operating Group (SROG) that jointly own the 91st Avenue treatment facility and are responsible for ensuring compliance with all Federal Pretreatment regulations.

Specific objectives of the Pretreatment Program are:

  • Prevent interference in wastewater treatment processes at our POTWs (Publicly Owned Treatment Works).
  • Prevent pass-through of pollutants from treatment works into receiving streams.
  • Prevent contamination of treatment plant sludge to allow for land application and/or landfilling.
  • Protect the health and safety of sewer and treatment plant workers.

Prescription/Non-Prescription Medication Disposal

NEW! Download the Prescription/Non-Prescription Medication Disposal Brochure (PDF)

The program’s objectives are met by educating and assisting local businesses in understanding their responsibilities under Glendale City Code and federal pollution control requirements.

Significant Industrial Users Permitting Program

Discharge permits are issued to significant industrial users. The permits are valid for three years and list certain requirements and conditions that must be met in order to continue to discharge wastewater into the City sewer system. These requirements include controlling the quality of their discharge by installing appropriate treatment systems that will “pretreat” their effluent prior to discharge to the sewer system. Please refer to City Code Section 33-232 for a listing of the Significant Industrial User requirements.

Significant Industrial Users (SIU) include:

  • All users subject to Federal categorical pretreatment standards under Title 40 of the Code of Federal Regulations
  • Any user that discharges an average of 25,000 gallons or more a day of process wastewater into the City sewer system
  • Any user that contributes a process wastestream which comprises 5% or more of the treatment plant flow

Any user designated as such a SIU on the basis that it has a reasonable potential to adversely affect the treatment plant operation or violating any pretreatment standard or requirement

Contact Information

City of Glendale
Pretreatment Program Manager
West Area Water Reclamation Facility
5901 North Glen Harbor Blvd.
Phone: 623-930-4779


Glendale, AZ - Welcome
Glendale, AZ
Contact Us   |   Brochures   |   History of Glendale   |   How to Get Around Glendale   |   Links   |   Press Room   |   Policies
© 2015 City of Glendale, Arizona