Sanitary Sewer
This system collects wastewater from your toilet, sink, shower, drains and other sources in your home. The water is then treated at the City of Thunder Bay’s Water Pollution Control Plant and then returned to Lake Superior.
Storm Sewer
This system collects rain water and snow melt through storm grates on the roads. This water drains directly to the nearest lakes and rivers; there is NO treatment process. Anything poured into a storm sewer ends up directly in our lakes and rivers. Disposing pollutants into a storm sewer is illegal.