Lagoon Wastewater Treatment Plant, Paroisse de Saint-Hilaire, New Brunswick

The Lagoon wastewater treatment plant is located in Paroisse de Saint-Hilaire, a rural community in Madawaska County, New Brunswick, Canada. It serves a population of 899 residents and operates under the regulatory framework of the Canadian federal and provincial environmental laws, including the Fisheries Act and New Brunswick's Clean Water Act. The plant provides secondary treatment, which is a biological process that removes organic matter and suspended solids. Secondary treatment is standard for small communities in Canada and meets the requirements for inland discharge. The plant's annual discharge volume is 403.70 megaliters. The treated effluent is discharged into a local watercourse that eventually flows into the Saint John River, a major river system in the region. The Saint John River drains into the Bay of Fundy, known for its high tidal range and diverse marine ecosystem. The plant's operation helps protect downstream water quality and aquatic habitats.

The Lagoon plant discharges into a tributary of the Saint John River, which flows through New Brunswick and into the Bay of Fundy. The Bay of Fundy is an ecologically significant area with extreme tides and supports diverse marine life, including fish and migratory birds. The plant's secondary treatment reduces pollutants to protect this downstream environment.