Tallbergs ARV Wastewater Treatment Plant, Tällberg, Sweden

Tallbergs ARV is an advanced wastewater treatment plant located in Tällberg, within Leksands kommun, Dalarnas län, Sweden. The plant serves a small population of 934 residents, reflecting its role in a rural or semi-rural community in central Sweden. As an advanced treatment facility, Tallbergs ARV goes beyond secondary treatment to remove nutrients and other pollutants, ensuring high-quality effluent. The plant has a designed capacity of 5,000 m³/day, with a current discharge volume of 146.62 m³/day, indicating ample capacity for future growth. Under Swedish regulations, which implement the EU Urban Waste Water Treatment Directive, advanced treatment is required for sensitive areas, and this plant meets that standard. The treated effluent from Tallbergs ARV is discharged into the local watershed, which ultimately drains into Lake Siljan, one of Sweden's largest lakes, and then via the Dalälven River to the Baltic Sea. The plant's advanced treatment helps protect the sensitive aquatic ecosystems of Lake Siljan and downstream waters from nutrient pollution.

Tallbergs ARV discharges into the local catchment that feeds Lake Siljan, a large and ecologically important lake in Dalarna. Lake Siljan supports diverse aquatic life and is a key recreational resource. The lake drains via the Dalälven River into the Baltic Sea, a brackish sea with sensitive marine ecosystems. The plant's advanced treatment reduces nutrient loads, helping to prevent eutrophication in both the lake and the Baltic Sea.