Zarasu aglomeracija Wastewater Treatment Plant, Sarakiškės, Lithuania

Zarasu aglomeracija is an advanced wastewater treatment plant located in Sarakiškės, a village in the Zarasai district of Utenos apskritis, Lithuania. The plant serves a population of 3,400, classifying it as a small agglomeration under EU standards. It is part of the municipal wastewater infrastructure for the Zarasai region. The plant provides advanced treatment, which goes beyond the EU Urban Waste Water Treatment Directive's minimum requirement of secondary treatment for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. The plant has a designed capacity of 35,333 m³/day and discharges 741 m³/day of treated wastewater. Treated effluent from the plant likely flows into local rivers that drain into the Daugava River basin, eventually reaching the Baltic Sea. The plant's advanced treatment helps protect downstream aquatic ecosystems, including lakes and rivers in the region, which are important for biodiversity and recreation.

The plant discharges into local watercourses that are part of the Daugava River basin, which flows into the Baltic Sea. The region features numerous lakes and rivers that support diverse aquatic life and are ecologically sensitive. Advanced treatment ensures nutrient removal, reducing the risk of eutrophication in downstream waters.