The Fermont waste water treatment plant discharges through lakes Daviault and Sans-Nom into Carheil Lake, in the Moisie River watershed. In April 2011 it was reported that water management experts in Sept-Îles were concerned about cyanobacteria, or blue-green algae, that had been found in Carheil Lake and had potential to further affect the Moisie River. The bloom was due to phosphorus discharge from the treatment plant, which has since been reduced.
The Fermont wastewater treatment plant discharges into lakes Daviault and Sans-Nom, which flow into Carheil Lake, part of the Moisie River watershed. In April 2011, water management experts in Sept-Îles expressed concern about cyanobacteria (blue-green algae) found in Carheil Lake, which posed a threat to the Moisie River. The bloom was caused by phosphorus discharge from the treatment plant, which has since been lessened.