The Guelph Wastewater Treatment Plant (WWTP) provides treatment of domestic, commercial, institutional and industrial wastewater collected from the City of Guelph and the neighbouring community of the Township of Guelph/Eramosa. The facility, located at 530 Wellington Street West, provides tertiary treatment with disinfected effluent being discharged to the Speed River.
The WWTP provides preliminary screening and grit removal, primary treatment by sedimentation, secondary treatment by conventional and extended aeration activated sludge and two stage tertiary treatments utilizing rotating biological contactors (RBC) followed by sand filtration. Disinfection of the final effluent is a requirement and is accomplished by the addition of sodium hypochlorite followed by the addition of sodium bisulphite for de-chlorination prior to discharge to the receiving stream.
Monday to Friday 8 a.m. – 4 p.m.
After hours emergency: 1-866-630-9242
As of June 19, please use ON1Call to request locates
for any activity that involves digging
This includes, but is not limited to:
- Building decks and fences
- Installing pools
- Paving or laying driveways
- Planting trees
- Creating new gardens
- Installing light standards
Visit on1call.com or call 1-800-400-2255 for more information.
The locate request service does not replace the need for building and other permits for the same types of work. Permit requests are still administered by Building Services Visit guelph.ca/building for more information.
Help keep Guelph’s sewer system fat-free
Where does the grease come from?
- Butter and margarine
- Cooking oil
- Dairy products
- Food scraps
- Lard and shortening
- Meat fats
What are the results of a sewer blockage from your home?
- Raw sewage overflowing into your home or your neighbours’ home;
- An expensive and unpleasant cleanup that often must be paid for by the homeowner;
- Raw sewage overflowing into parks, yards, streets, and bodies of water;
- Potential exposure to disease-causing organisms;
What you can do to help
How to dispose of grease properly
- Never pour grease down the sink drains or toilets.
- Solidified grease can be scraped into your Wet bag.
- Liquid cooking oils (e.g. from a deep fryer) can be poured into a container and dropped off at the Household Hazardous Waste Depot.
Tips for keeping Guelph’s sewer system fat-free
- Scrape solidified grease and food scraps from your plates, utensils, pots, pans, food preparation area and cooking area into your Wet bag or compost pile.
- Place a strainer in your sink to catch food scraps and other solids. Dispose of grease and food scraps in your Wet bag or compost pile.
- Use a paper towel to wipe up grease and dispose of the paper towel in your Wet bag or compost pile.
- Be careful when using a commercial cleaner or detergent which claims to dissolve grease as they may only transport the problem further down the sewer system.
For After Hour Emergencies call 1-866-630-9242.
Publications and educational material
EducationalWastewater Plant Process Schematic All About Sewers All About Wastewater History of the Wastewater Facility
Keep our sewer system fat, oil and grease free – for households
Keep our sewer system fat, oil and grease free – for restaurants
Keep our sewer system chemical and pollutant free
Safely maintain your pool, spa and hot tub
PlansWastewater Treatment Master Plan Biosolids Management Master Plan
By-lawsSewer Use By-law Storm Water Disposal By-law Water and Wastewater Rates and Charges
940 kBWastewater Services 2015 Annual Report1 MBWastewater Services 2014 Annual Report1 MBWastewater Services 2013 Annual ReportWastewater Services 2012 Annual ReportWastewater Services 2011 Annual Report