Miejska Oczyszczalnia Sciekow w Gorowie Ilaweckim - Secondary Wastewater Treatment in Miłkowo, Poland

Miejska Oczyszczalnia Sciekow w Gorowie Ilaweckim is a municipal wastewater treatment plant located in Miłkowo, within the gmina of Orneta in the powiat lidzbarski of warmińsko-mazurskie province, Poland. The plant serves a population of approximately 3,664 and is classified as a small agglomeration under Polish and EU regulations. The plant provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity is 6,417 m³/day, and the current discharge volume is 522.43 m³/day, indicating significant available capacity. The plant operates under Polish water law, which implements the EU directive and requires permits issued by the regional water management authority. The treated effluent is discharged into local watercourses that ultimately drain into the Baltic Sea via the Vistula Lagoon or directly into the Baltic. The region is part of the Vistula Basin, and the plant's operations help protect downstream aquatic ecosystems, including sensitive coastal waters of the Baltic Sea, which are subject to eutrophication pressures from nutrient loads.

The plant discharges into local streams that flow into the Pasłęka River, which drains into the Vistula Lagoon and then the Baltic Sea. The Baltic Sea is a semi-enclosed brackish sea highly sensitive to nutrient pollution, making effective wastewater treatment critical for controlling eutrophication. The surrounding area includes agricultural lands and forests, contributing diffuse nutrient inputs that the plant's secondary treatment helps mitigate.