Mouse Island Outfall Wastewater Treatment Plant, Channel-Port aux Basques, Newfoundland and Labrador

Mouse Island Outfall is a wastewater treatment facility located in Channel-Port aux Basques, Newfoundland and Labrador, Canada. The plant serves a small population of 445 residents, providing secondary treatment for municipal wastewater. As a coastal facility, it plays a key role in managing local sewage before discharge. The plant operates under Canadian federal and provincial regulations, which require secondary treatment for discharges into sensitive environments. The facility meets the treatment standards expected for small communities in coastal regions of Canada. The treated effluent is released into the coastal waters of the Gulf of St. Lawrence, a major marine ecosystem supporting diverse aquatic life including fish, seabirds, and marine mammals. The plant's operation helps protect the local marine environment from untreated sewage impacts.

The plant discharges into the Gulf of St. Lawrence, a large marine basin connected to the Atlantic Ocean. This coastal area supports important fisheries and migratory bird populations. The secondary treatment process reduces organic pollutants and suspended solids, helping maintain water quality in the nearshore environment.