For the third time this year, the town of Fort Frances was forced to dump partially-treated sewer directly into the Rainy River.
The by-pass of the sewage treatment plant happened during last week's rain storm.
Operations and Facilities manager Doug Brown says chlorine was added to the 965 cubic meters of waste before it entered the river.
The Ministry of Environment was notified of the occurrence.
The town also by-passed the plant during two heavy rain storms in July.
