Middle Sackville Lagoon Wastewater Treatment Plant, Sackville Parish, New Brunswick

Middle Sackville Lagoon is a municipal wastewater treatment facility located in Sackville Parish, New Brunswick, Canada. The plant serves a population of approximately 2,227 residents in the Tantramar region of Westmorland County, operating as part of the province's wastewater infrastructure. As a lagoon-based system, the plant provides primary or secondary treatment typical for small communities in Canada. Under the federal Wastewater Systems Effluent Regulations (WSER) and provincial guidelines, facilities of this scale must meet effluent quality standards for carbonaceous biochemical oxygen demand, suspended solids, and ammonia. The plant's designed capacity is 1.00 million liters per day, supporting the local population. The treated effluent from Middle Sackville Lagoon discharges into the local watershed, which drains into the Bay of Fundy via the Tantramar River and nearby marshes. The Bay of Fundy is a globally significant ecosystem known for its extreme tides and rich marine biodiversity, including critical habitat for migratory shorebirds and fish species. The plant's operation helps protect these downstream environments from untreated wastewater impacts.

The plant discharges into the Tantramar River system, which flows into the Cumberland Basin and ultimately the Bay of Fundy. The Bay of Fundy is a highly productive marine ecosystem with the highest tides in the world, supporting diverse aquatic life including Atlantic salmon, striped bass, and millions of migratory shorebirds. The surrounding Tantramar Marshes are ecologically sensitive wetlands that provide important flood control and habitat functions.