SILJANSNAS ARV - Advanced Wastewater Treatment Plant in Fornby, Sweden

SILJANSNAS ARV is a wastewater treatment plant located in Fornby, within Leksands kommun, Dalarnas län, Sweden. The plant serves a population of 1,273 and is situated near the shore of Lake Siljan, a prominent lake in the region. As an advanced treatment facility, it provides a high level of purification for the local community. The plant has a designed capacity of 3,700 volume units and currently discharges 199.84 volume units of treated wastewater. Operating under Sweden's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), the plant meets stringent standards for nutrient removal and effluent quality, which are typical for sensitive areas like the Dalarna region. The advanced treatment level ensures that the discharged water has minimal environmental impact. The treated effluent from SILJANSNAS ARV is discharged into the local watershed, which drains into Lake Siljan. Lake Siljan is a large, ecologically significant lake that supports diverse aquatic life and is an important recreational and ecological resource. The lake ultimately drains via the Dalälven River into the Baltic Sea, making the plant's advanced treatment crucial for protecting downstream water quality.

SILJANSNAS ARV discharges treated wastewater into the Lake Siljan catchment, which is part of the Dalälven River basin. Lake Siljan is a large, oligotrophic lake with high ecological value, supporting diverse fish populations and aquatic vegetation. The Dalälven River flows southeast into the Baltic Sea, a brackish water body sensitive to nutrient inputs. The plant's advanced treatment helps reduce nutrient loads, protecting the lake and downstream ecosystems from eutrophication.