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Until Election Day
on October 24

South End Sewage Treatment Plant

SEWPCC Aerial Image

Located at 100 Ed Spencer Drive, just south of the Perimeter Highway, the SEWPCC (South End Water Pollution Control Centre) processes approximately 20% of the wastewater generated in the City of Winnipeg.

Plant Summary


  • Commissioned in 1974, the SEWPCC was Canada’s first plant that utilizes more than 90% pure oxygen in its biological reactors
  • Two biological reactors and one final clarifier were added in a 1990 plant upgrade
  • In 2000, Ultraviolet Disinfection (UV) was added to meet the E.coli limit
  • A thermal oxidizer was added in 2005 to reduce odor emissions from the sludge holding tanks
  • Sludge (waste activated sludge and primary sludge) is sent to the NEWPCC for digestion and dewatering

Odour Control Measures FAQs

What does the City do to control odour at SEWPCC?

The heat, ventilation and air conditioning (HVAC) system takes air from a variety of different process areas at the South End Sewage Treatment Plant, and ventilates it to an odour control stack at the facility.

The odour control stack is 45 meters high and disperses the exhaust air into the atmosphere, diluting any odorous gases.

To further reduce potential odour concerns, a thermal oxidizer unit was installed in 2005/2006. The unit treats odours coming from the sludge storage tank and truck-hauling bays. The system operates during warm weather season, from early May to late October.

Are there any changes or additional odour control measures being done as part of the current SEWPCC Upgrade Project?

In addition to the odour control stack and the thermal oxidizer unit, a new bio-filter system will be added to the facility, as part of the South End Water Pollution Control Centre Upgrade and Expansion Capital project. Concentrated foul air sources from the new sludge thickening system and new sludge fermenters will be sent to the new biofilter for treatment. Bio filtration is a biological process that converts odour-causing compounds into non-odorous gases and salts. The biofilter system will be housed in a concrete enclosure.

What factors affect odour in our neighbourhoods?

There are a number of factors that may impact what we smell in our neighbourhood. Some of these include seasonal variations like precipitation, wind, and humidity. These all impact what we smell at a given time. Odours may also be the result of the treatment plant, local farmersí fields with freshly spread fertilizer or other industrial operations in our neighbourhoods. The odours that come from these places can be easily confused, making it difficult to pinpoint its origin.

The Cityís sewage treatment plant upgrades include industry standard odour control technology for the new process areas, which will help us minimize the plantís potential impact on the communities nearby.

Who do I notify about odour coming from the plant?

If you notice odour coming from SEWPCC, please report it by calling 311 or emailing

Last updated: June 29, 2018