TANDADALENS ARV - Advanced Wastewater Treatment Plant in Dalarnas län, Sweden

TANDADALENS ARV is an advanced wastewater treatment plant located in the Malung-Sälens kommun of Dalarnas län, Sweden. Serving a population of 1,247, this facility is part of Sweden's comprehensive wastewater infrastructure, which is regulated under the EU Urban Waste Water Treatment Directive (91/271/EEC). As a small agglomeration, it meets the directive's requirements for appropriate treatment to protect the local environment. The plant employs advanced treatment processes, which go beyond the secondary treatment standard to remove nutrients and other pollutants. With a designed capacity of 9,714 cubic meters per day and an actual discharge volume of 195.76 cubic meters per day, the plant operates well within its capacity, ensuring reliable treatment for the community. The treated effluent from TANDADALENS ARV is discharged into the local watershed, which ultimately drains into the Baltic Sea via the Dalälven river system. This region is ecologically sensitive, supporting diverse aquatic life and serving as an important corridor for migratory fish species. The advanced treatment helps minimize nutrient loading and protects downstream water quality.

The plant discharges into the Dalälven river basin, which flows through central Sweden and empties into the Baltic Sea. This watershed supports a variety of aquatic ecosystems, including salmonid spawning grounds and extensive wetlands. Advanced treatment at the plant reduces nutrient and pollutant loads, helping to maintain the ecological health of the river and the coastal waters of the Baltic Sea.