MALILLA ARV - Advanced Wastewater Treatment Plant in Målilla, Sweden

MALILLA ARV is a wastewater treatment facility located in Målilla, within Hultsfred municipality, Kalmar County, Sweden. The plant serves a population of about 1,200 residents and has a designed capacity of 4,000 cubic meters per day, with a current discharge volume of 189 cubic meters per day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. As a Swedish facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for discharges into sensitive areas. Sweden's national implementation ensures high standards for water quality protection. The treated effluent is discharged into local watercourses that eventually drain into the Baltic Sea. The plant plays a key role in protecting downstream aquatic ecosystems, including rivers and coastal waters in the Kalmar Strait region. Its advanced treatment helps reduce nutrient loading, which is critical for combating eutrophication in the Baltic Sea.

The plant discharges into local streams that flow into the Emån river system, which ultimately reaches the Baltic Sea near Oskarshamn. The Baltic Sea is a brackish water body sensitive to nutrient pollution, and advanced treatment at this plant helps reduce nitrogen and phosphorus loads. The surrounding region includes forested and agricultural areas, and the plant supports the ecological health of the Emån catchment, which hosts diverse fish and bird species.