Hillsborough Lagoon Wastewater Treatment Plant, Hillsborough Parish, New Brunswick

Hillsborough Lagoon is a municipal wastewater treatment facility located in Hillsborough Parish, New Brunswick, Canada. The plant serves a small population of approximately 1,058 residents and operates under Canadian federal and provincial regulations for wastewater management. The plant provides secondary treatment, which is the standard level required for communities of this size in Canada. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids before discharge. The facility is situated within 10 km of the coast, placing it in a sensitive coastal zone where nutrient and pathogen control are important. The treated effluent from Hillsborough Lagoon ultimately drains into the Bay of Fundy, a globally significant marine ecosystem known for its extreme tidal ranges and rich biodiversity. The bay supports critical habitats for fish, seabirds, and marine mammals, including the endangered North Atlantic right whale. Proper treatment helps protect these downstream environments from nutrient loading and contamination.

The plant discharges into the Bay of Fundy watershed, a coastal ecosystem with the highest tides in the world. The bay supports diverse marine life including fish, seabirds, and marine mammals. Its intertidal zones are ecologically sensitive, providing nursery habitats for many species. The region's coastal waters are influenced by tidal mixing, which helps disperse treated effluent but also requires careful management to prevent localized impacts.