The Water Pollution Control PlantThe wastewater that goes down the drains in our homes and businesses travels through the City of Thunder Bay sanitary sewer system to the Waler Pollution Control Plant (WPCP), where it is treated before being sent back into the environment. Learn more about the Wastewater Treatment Plant process.

Learn more about the City's stormwater system.

Report a problem

Report a Sewer issue 

To report by phone, or for more information, contact Infrastructure & Operations Dispatch 24 hours a day at 807-625-2195.

Report a Sewer issue 

To report by phone, or for more information, contact Infrastructure & Operations Dispatch 24 hours a day at 807-625-2195.

Down the drain

The Sewer Use By-law limits what you can put down our sanitary sewers and storm sewers. What goes down the drain affects us all. The future health of our drinking water source depends on everyone acting responsibly.

Put garbage where it belongs inside your home or business.

 Items you should never put down the toilet or drain
Never use the toilet or drain to get rid of:
  • dental floss
  • rags
  • tampons, applicators or sanitary napkins
  • disposable diapers
  • cosmetics
  • cotton swabs
  • food scraps
  • fat, grease or cooking oils
  • condoms
  • cigarette butts

You must dispose of chemicals, prescription drugs and hazardous waste safely. Pharmacies will take back unused and expired prescription and non-prescription medicines and medical sharps for safe disposal. Learn more about safe disposal through our Household Hazardous Waste Handout.

Wastewater Treatment Annual Report

We prepare a Waste Water Treatment Annual Report to meet the requirements of the Ministry of the Environment and Climate Change. It has statistics and a description of the pollution control process. 

Wastewater System Financial Plan

The Wastewater System Financial Plan projects the operating and capital plan for the next 20 years. Our goal is to achieve financial sustainability, full-cost recovery, and low cost for consumers while keeping the City’s service levels for sewage collection and treatment.

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