Pakruojo aglomeracija Wastewater Treatment Plant, Mažeikoniai, Lithuania

Pakruojo aglomeracija is a wastewater treatment plant located in Mažeikoniai, a village in the Pakruojo district of Šiaulių apskritis, Lithuania. The plant serves a population of 2,800 and is part of the country's municipal wastewater infrastructure, operating under national regulations aligned with the EU Urban Waste Water Treatment Directive (UWWTD). The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients such as nitrogen and phosphorus. With a designed capacity of 11,000 m³/day and an average discharge volume of 738.88 m³/day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local water bodies, contributing to the protection of the broader watershed. Lithuania's rivers flow into the Baltic Sea, and advanced treatment helps reduce nutrient loading that can cause eutrophication in coastal waters. The plant's location inland, away from the coast, further mitigates direct marine impact.

The plant discharges into local streams that are part of the Lielupė River basin, which flows into the Baltic Sea via the Gulf of Riga. This watershed supports diverse aquatic life and is ecologically sensitive to nutrient pollution. Advanced treatment at the plant helps reduce the risk of eutrophication in downstream waters, protecting both freshwater and marine ecosystems.