Vilhelmina Avloppsreningsverk - Advanced Wastewater Treatment Plant in Vilhelmina, Sweden

Vilhelmina Avloppsreningsverk is a municipal wastewater treatment plant located in Vilhelmina, Västerbottens län, Sweden. The plant serves a population of about 4,632, classifying it as a small to medium agglomeration under Swedish and EU regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for sensitive areas. With a designed capacity of 5,000 m³/day and an average discharge volume of 727.14 m³/day, the facility operates well within its capacity, ensuring effective treatment. The treated effluent is discharged into the local watershed, which ultimately drains into the Baltic Sea via the Ångermanälven river system. The plant plays a key role in protecting downstream water quality and supporting the ecological health of the region's aquatic environments.

The plant discharges into the local watercourse, part of the Ångermanälven river basin, which flows into the Baltic Sea. This region features sensitive aquatic ecosystems, including spawning grounds for salmonids and diverse freshwater species. Advanced treatment helps minimize nutrient loading and protects the downstream environment from eutrophication.