Basin D Wastewater Treatment Plant, Corner Brook, Newfoundland and Labrador

Basin D is a municipal wastewater treatment facility located on Griffin Drive in Corner Brook, Newfoundland and Labrador, Canada. The plant serves a population of 1,479 and operates under secondary treatment, which is the standard for Canadian communities of this size. It is situated in a coastal region of the island of Newfoundland, within the Humber River basin. The plant provides secondary treatment, a biological process that removes organic matter and suspended solids. With a discharge volume of 664 cubic meters per day, it meets the regulatory requirements set by the federal Wastewater Systems Effluent Regulations (WSER) under the Canadian Environmental Protection Act. These regulations mandate effluent quality standards for carbonaceous biochemical oxygen demand, suspended solids, and total residual chlorine. The treated effluent is discharged into the Humber River, which flows into the Bay of Islands and eventually the Gulf of St. Lawrence. The receiving waters support diverse aquatic life, including Atlantic salmon and brook trout, and are important for local fisheries and recreation. The plant's coastal proximity means its discharge can influence nearshore marine ecosystems.

Basin D discharges into the Humber River, which drains into the Bay of Islands and then the Gulf of St. Lawrence, a major marine ecosystem. The watershed supports Atlantic salmon, brook trout, and other cold-water species. The plant's coastal location (within 10 km) means its effluent can affect nearshore habitats, including estuaries that serve as nursery grounds for fish and invertebrates. The region's climate and hydrology influence dilution and dispersion of treated wastewater.