Lagune de la rue du Portage Wastewater Treatment Plant, Caraquet, New Brunswick

Lagune de la rue du Portage is a municipal wastewater treatment facility located in Caraquet, New Brunswick, Canada. The plant serves a small community of approximately 1,032 residents and operates under the regulatory framework of the Canadian federal and provincial environmental protection acts. As a secondary treatment plant, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant's treatment process is classified as secondary, which is the standard level required for municipal wastewater in Canada to protect receiving water quality. The facility discharges an average of 463.30 cubic meters of treated wastewater per day. The plant's scale aligns with small community systems common in rural Atlantic Canada. The treated effluent is discharged into the local watershed, which ultimately drains into the Gulf of St. Lawrence via Caraquet Bay. This coastal environment supports diverse marine life, including fish, crustaceans, and migratory birds. The plant's proximity to the coast necessitates careful management to minimize nutrient and pathogen impacts on the sensitive marine ecosystem.

The plant discharges into the Caraquet Bay watershed, which flows into the Gulf of St. Lawrence, a major marine ecosystem supporting fisheries and migratory bird populations. The coastal environment is ecologically sensitive, with habitats for species such as Atlantic salmon and various waterfowl. Secondary treatment helps reduce organic loading and suspended solids, protecting water quality in the bay and downstream marine areas.