Industrial Pretreatment

The purpose of the city’s Pretreatment Program is to prevent the introduction of harmful pollutants into the sewer system which could:

• Degrade the quality of our municipal digested bio solids
• Negatively affect the sanitary sewer or its operations
• Pass through the treatment plant and contaminate the Willamette River

Another primary objective of the Pretreatment Program is to improve opportunities to recycle or reclaim our sewer system’s wastewater and bio solids. Read the Industrial Pretreatment Brochure for an in depth look at the pretreatment process and who is required to obtain a permit.

Industrial & Commercial Environmental Survey 

Read the 2023 Annual Pretreatment Report.

Fats, Oil & Grease

Industrial Pretreatment staff also work with businesses and citizens to keep fats, oils, and grease (FOG) from damaging plumbing pipes, the collection system, the wastewater treatment plant, and the environment.

For more information on FOG, watch the following videos:

• Freeze the Grease, Save the Drain (courtesy of Clean Water Services)

Safely Disposing of Drugs

The City of Wilsonville will no longer be accepting unwanted and unused drugs at the Public Works building located at 30000 SW Town Center Loop E.

Please drop off any unwanted and unused drugs at the CVS Pharmacy located in the Target at Argyle Shopping Center - 25925 SW Heather Place, Wilsonville, OR 97070.  Open Monday - Friday 9AM-8PM, Saturday 10AM-2PM and Sunday 11AM-5PM

Do not dispose of the following hazardous waste products:

• Thermometers
• Needles, lancets or syringes
• Medical waste of any kind

Please see the City's Garbage and Recycling Services page for more information.

For any questions please contact Steve Gering by phone at (503) 570-1551 or via email at gering@ci.wilsonville.or.us