SATERS ARV Wastewater Treatment Plant, Säter, Sweden

SATERS ARV is a wastewater treatment facility located in Säter, Dalarna County, Sweden. The plant serves a population of about 4,529 residents, classifying it as a small to medium agglomeration under Swedish and EU regulations. It is situated inland, away from coastal areas, and its operations are part of the municipal infrastructure managed by the local authority. 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). This level of treatment typically includes nutrient removal, such as nitrogen and phosphorus reduction, to protect sensitive receiving waters. The designed capacity of 8,000 m³/day indicates the plant is sized to accommodate future growth, with a current discharge volume of approximately 711 m³/day. The treated effluent is discharged into local water bodies that eventually drain into the Dalälven River basin. This river system flows into the Baltic Sea, making the plant's advanced treatment crucial for reducing nutrient loads and preventing eutrophication in downstream coastal waters. The plant's performance supports Sweden's commitment to high environmental standards for wastewater treatment.

The plant discharges into the Dalälven River basin, which flows southeast through Dalarna and into the Baltic Sea near Gävle. The Dalälven is one of Sweden's major rivers, supporting diverse aquatic life and serving as a critical habitat for migratory fish species. Advanced treatment at SATERS ARV helps minimize nutrient pollution, protecting the river's ecological health and the sensitive Baltic Sea environment from eutrophication.