About Industrial Pretreatment (IPP)

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What & Why IPP? - Infographic

The National Pretreatment Program is a cooperative effort of federal, state, and local regulatory environmental agencies established to protect water quality. The program is designed to reduce the level of potentially toxic pollutants discharged by industry and other non-domestic wastewater sources into municipal sewer systems, and thereby, reduce the amount of pollutants released into the environment from these sources.

The U.S. Environmental Protection Agency has delegated DEQ the authority to approve pretreatment programs at the local level and oversee state-wide pretreatment activities. The communities approved to implement the pretreatment program have the legal authority to issue industrial user permits, conduct inspections of industrial and commercial sources, sample industrial discharges and enforce regulations. These programs also routinely perform self-monitoring to ensure the protection of worker safety, the wastewater treatment plant operations, biosolids and water quality.

Industrial Customers 

IPP serves approximately 160 non-domestic users. A non-domestic user can be defined in several ways, including any business that:

  • is classified as a "Categorical User" in accordance with the 40 CFR Categorical Pretreatment Standard - Industrial Categories listing established by the EPA (40 CFR, Chapter 1, Subchapter N, Parts 405-471).
  • discharges more than 25,000 gallons per day of wastewater to the sewer
  • is subject to certain US Evironmental Protection Agency regulations

(examples include metal finishers or electroplaters)

Commercial Customers

IPP also serves thousands of private enterprises throughout the City of Bend. Our experts work with businesses such as breweries, photo processors, and car washes. They help businesses understand local sewer use regulations and wastewater pollution prevention options. 

Contact Us

City of Bend Industrial Pretreatment Program


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