Officials with the City of Winnipeg said a processing issue has led to the south-end plant sending partially untreated sewage into the Red River.
"Due to the unique nature of the process disruption, the City has assembled a team of experts to help return the plant to normal operation as soon as possible and develop a plan to prevent this from reoccurring. The City has also increased its monitoring of the Red River to confirm that the discharge is not harming the river," said officials in a release.
The plant has four stages of sewage treatment and the process is "operating at about 50 (per cent)," said the city.
A secondary biological treatment process is not currently functioning properly. Officials first noticed the problem on Oct. 7.
The city said the plant is still operating, however, and the disruption hasn't had any effect on homes or sewage collection, but advised people to avoid any contact with river water.
Officials are unsure when the problem will be fixed.
The province also issued information on Thursday.
"Manitoba Conservation advises a full review will take place to ensure everything possible is done to prevent a similar situation in the future," said the province in a release.
