Olszyna Wastewater Treatment Plant, Olszyna | Poland

The Olszyna wastewater treatment plant is located in the town of Olszyna, within the gmina Olszyna in powiat lubański, województwo dolnośląskie, Poland. It serves a population of approximately 4,041, placing it in the small agglomeration category under Polish and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 8,870 m³/day and an actual discharge volume of 576.18 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Odra River basin, which flows northward to the Baltic Sea. The plant's operation helps protect the local watershed and downstream aquatic ecosystems from untreated wastewater pollution.

The Olszyna plant discharges into the Odra River basin, which flows through western Poland and into the Baltic Sea via the Szczecin Lagoon. The watershed supports diverse aquatic life and is an important ecological corridor. The plant's secondary treatment reduces organic load and suspended solids, helping to maintain water quality in this sensitive river system.