Noresund avlopsanlegg - Wastewater Treatment Plant in Noresund, Norway

Noresund avlopsanlegg is a municipal wastewater treatment facility located in Noresund, Krødsherad municipality, Buskerud county, Norway. The plant serves a population of approximately 3,600 residents, placing it in the small-to-medium agglomeration category under Norwegian and EU regulatory frameworks. As a Norwegian treatment plant, Noresund avlopsanlegg operates under national regulations that implement the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size, secondary treatment is typically required, with more advanced treatment if the receiving waters are sensitive. Norwegian plants commonly employ mechanical, biological, and sometimes chemical treatment stages to meet discharge standards. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Tyrifjorden lake system via the Krøderen lake and the Drammenselva river. Tyrifjorden is Norway's fifth-largest lake and an important ecological area, supporting diverse aquatic life and serving as a recreational resource. The plant's operations contribute to protecting this downstream environment from nutrient pollution and other contaminants.

Noresund avlopsanlegg discharges into the Krøderen lake, which flows into the Drammenselva river and eventually into the Tyrifjorden lake system. Tyrifjorden is a large, deep lake that supports diverse fish populations, including brown trout and Arctic char, and is an important migratory corridor for birds. The plant's treatment performance is critical to maintaining water quality in this ecologically sensitive watershed, which also supplies drinking water and supports recreation.