The City of Thunder Bay’s sanitary and storm water sewer system provides an essential service. Wastewater going down the drains in our homes and businesses travels through the sanitary sewers and, combined with water in our storm water system, travels to the Water Pollution Control Plant to be cleaned and treated before it is sent back into the environment. What goes down the drain affects us all. The future health of our drinking water source depends on everyone acting responsibly.
Municipal By-laws limit what can be put down sanitary sewers and storm sewers. The Sewer Use By-law defines what can be discharged into a sewer – whether sanitary, combined, or storm sewer. Some substances and materials are prohibited.
Inside your home or business, do your part. Put garbage where it belongs – never use the toilet or drain to dispose of:
Chemicals, prescription drugs and hazardous waste products must be disposed of safely. These substances need special handling. Pharmacies will take back unused and expired prescription and non-prescription medicines and medical sharps for safe disposal. Contact your pharmacist for more information.
Always deliver hazardous waste to the Household Hazardous Waste Depot at the City of Thunder Bay Solid Waste and Recycling Facility, free of charge. Use environmentally safe, biodegradable detergents and personal care products. Instead of purchasing cleaning products that contain chemicals, try some of the safer, alternative product recipes listed here. Improper disposal of hazardous waste can have serious consequences for public health and safety, municipal infrastructure and the environment. Even if each discharge is very small, the total combined effect can be significant.
These documents provide more information about Waste Water Treatment and Hazardous Waste:

For more information, contact Infrastructure & Operations Dispatch at 625-2195.