Atholville Lagoon Wastewater Treatment Plant, Paroisse d'Addington, New Brunswick

Atholville Lagoon is a wastewater treatment plant located on Rue Boom in Atholville, within the Paroisse d'Addington, Restigouche County, New Brunswick, Canada. The facility serves a population of about 2,984 people and is classified as a small agglomeration under Canadian wastewater standards. As a lagoon-based system, the plant provides natural treatment through settling and biological processes. With a designed capacity of 1.00 (likely in million liters per day or similar units), the plant is sized for the local community. In Canada, wastewater treatment for small communities is regulated under provincial guidelines, with New Brunswick requiring effluent quality standards that protect receiving waters. The plant's treated effluent discharges into the local watershed, which ultimately drains into the Restigouche River and then into the Baie des Chaleurs, part of the Gulf of St. Lawrence. This region supports diverse aquatic life, including Atlantic salmon and other migratory fish species, making proper treatment essential for ecosystem health.

The plant's discharge enters the Restigouche River watershed, which flows into the Baie des Chaleurs and then the Gulf of St. Lawrence. This estuarine environment supports important fisheries and migratory bird populations. The Restigouche River is known for its Atlantic salmon runs, and maintaining water quality is critical for the health of this ecosystem. The proximity to the coast (within 50 km) means that nutrients and pollutants from wastewater can impact marine habitats if not adequately treated.