Rzeczenica Wastewater Treatment Plant - Poland | Secondary Treatment for ~5,900 People

Rzeczenica wastewater treatment plant is located in the town of Rzeczenica, in the Pomeranian Voivodeship of northern Poland. The facility serves a population of approximately 5,900, classifying it as a small to medium agglomeration under Polish and EU regulations. The plant is situated inland, away from the Baltic coast, and treats municipal wastewater from the local community. 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 6,106 m³/day, and the current discharge volume is 840.68 m³/day, indicating significant spare capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into a local watercourse, which eventually drains into the Baltic Sea via the Vistula River basin. The plant plays a crucial role in protecting the region's surface waters from nutrient pollution, supporting aquatic life and downstream ecosystems. Its operation is subject to Polish environmental permits aligned with EU directives.

The plant discharges into a local stream that is part of the Vistula River basin, which flows northward into the Baltic Sea. The Baltic Sea is a semi-enclosed brackish sea sensitive to eutrophication from nutrient inputs. The secondary treatment at Rzeczenica reduces organic pollutants and nutrients, helping to mitigate algal blooms and oxygen depletion in downstream waters. The surrounding area includes agricultural land and forests, making the plant's role in controlling diffuse pollution important for local water quality.