Belsznica Wastewater Treatment Plant, Bełsznica | Silesian Voivodeship, Poland

Belsznica wastewater treatment plant is located in Bełsznica, a village in the Silesian Voivodeship of southern Poland. The plant serves a population of 1,517, classifying it as a small agglomeration under Polish and EU regulations. It operates as part of the municipal infrastructure managed by the local gmina (municipality) of Gorzyce. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Its designed capacity of 10,000 m³/day is significantly larger than the current discharge volume of 216.30 m³/day, indicating substantial reserve capacity for future growth or seasonal peaks. Secondary treatment typically involves biological processes such as activated sludge or trickling filters. The treated effluent is discharged into local watercourses that ultimately drain into the Oder River basin. The Oder flows northward to the Baltic Sea, passing through ecologically sensitive areas including the Lower Oder Valley and the Szczecin Lagoon. The plant's operation helps protect these downstream environments from nutrient pollution and organic loading.

The plant discharges into local streams that are part of the Oder River basin. The Oder River flows through Poland and Germany before reaching the Baltic Sea via the Szczecin Lagoon. This watershed supports diverse aquatic life and is an important migratory corridor for fish. The secondary treatment provided by the plant reduces organic pollutants and nutrients, helping to maintain water quality in the downstream river system and ultimately the Baltic Sea.