Trinity Outfall Wastewater Treatment Plant, Port Rexton, Newfoundland and Labrador

Trinity Outfall is a municipal wastewater treatment plant located on Skerwink Trail in Port Rexton, Newfoundland and Labrador, Canada. The facility serves a small population of 278 residents and operates as a secondary treatment plant, providing biological treatment to reduce organic pollutants and suspended solids before discharge. As a secondary treatment plant in Canada, Trinity Outfall operates under the federal Wastewater Systems Effluent Regulations (WSER) under the Fisheries Act, which sets national effluent quality standards for carbonaceous biochemical oxygen demand, suspended solids, and acute lethality. For a plant of this small scale, secondary treatment meets the regulatory requirements for protecting receiving waters. The plant discharges treated wastewater into the local environment near the coast of Newfoundland, within 10 km of the Atlantic Ocean. The receiving waters ultimately drain into the North Atlantic, supporting diverse marine life including fish stocks and seabird populations. The region's coastal ecosystem is sensitive to nutrient inputs, making treatment important for maintaining water quality.

The treated effluent from Trinity Outfall enters a coastal watershed on the eastern shore of Newfoundland, ultimately discharging into the Atlantic Ocean. The receiving waters support a cold-water marine ecosystem with species such as Atlantic cod, capelin, and various seabirds. The proximity to the coast means that nutrient and pathogen removal through secondary treatment is critical to protect nearshore habitats and recreational waters.