Holstneset avlopsrenseanlegg - Harstad Wastewater Treatment Plant, Norway

Holstneset avlopsrenseanlegg is a municipal wastewater treatment plant located at Holstneset in Harstad, a town in Troms county, northern Norway. The plant serves a population of approximately 5,578 people, placing it in the small to medium agglomeration category under Norwegian regulations. Its coastal location in the Harstadhamn area means it plays a key role in protecting the local marine environment. As a Norwegian facility, the plant operates under national regulations that implement the EU Urban Waste Water Treatment Directive (91/271/EEC) through the EEA Agreement. For agglomerations of this size, secondary treatment is typically required, with additional nutrient removal if discharging into sensitive areas. The plant discharges treated wastewater into the coastal waters near Harstad, which are part of the Vesterålen sea area connected to the Norwegian Sea. This region supports diverse marine life, including fish stocks and seabird populations. Proper treatment is essential to prevent nutrient enrichment and protect the ecological health of the fjord system and downstream marine environment.

The plant discharges into the coastal waters of Harstadhamn, which are part of the Vesterålen archipelago and ultimately drain into the Norwegian Sea. This marine environment supports cold-water coral reefs, fish spawning grounds, and important seabird colonies. Nutrient loading from wastewater could impact local water quality and marine biodiversity, making effective treatment critical for preserving the ecological balance of this northern coastal ecosystem.