Hagardsviken Garnes Wastewater Treatment Plant, Bergen, Norway

Hagardsviken Garnes is a wastewater treatment plant located in the Garnes district of Bergen, Vestland, Norway. It serves a small population of 342 residents, reflecting its role in a suburban or rural community within the greater Bergen area. The plant is situated near the coast, highlighting its importance in protecting the local marine environment. The plant provides secondary treatment, which is the standard biological treatment level required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges to coastal waters. Norway, as part of the European Economic Area, adheres to this directive. The plant's designed capacity of 700 m³/day indicates it can handle peak flows, while the current discharge volume of 148.32 m³/day suggests it operates well below capacity. The treated effluent is discharged into the coastal waters of the North Sea, specifically the Byfjorden or adjacent fjord system near Bergen. This area supports diverse marine life and is important for local fisheries and recreation. The plant's secondary treatment ensures that organic matter and suspended solids are reduced, minimizing eutrophication risks in the sensitive fjord ecosystem.

The plant discharges into the coastal waters of the North Sea via the Byfjorden fjord system near Bergen. This area is part of a larger network of fjords that support rich marine biodiversity, including cod, herring, and salmon populations. Secondary treatment helps reduce nutrient loading, which is critical to prevent algal blooms and oxygen depletion in the relatively enclosed fjord environment. The downstream waters eventually mix with the Norwegian Sea, contributing to the overall health of the North Atlantic ecosystem.