BOS 500 Wojcieszow Wastewater Treatment Plant, Wojcieszów, Poland

BOS 500 Wojcieszow is a municipal wastewater treatment plant located in Wojcieszów, in the Lower Silesian Voivodeship of Poland. The plant serves a population of 2,417 and operates with a designed capacity of 5,000 m³/day, currently discharging 344.63 m³/day of treated effluent. As a secondary treatment facility, the plant provides biological treatment to remove organic matter and suspended solids. Under Polish regulations implementing the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations between 2,000 and 10,000 population equivalent are required to achieve secondary treatment standards. The plant's capacity utilization suggests it has reserve capacity for future growth. The treated effluent is discharged into a local watercourse that flows into the Kaczawa River, a tributary of the Oder River. The Oder ultimately drains into the Baltic Sea via the Szczecin Lagoon. The plant plays a key role in protecting the Kaczawa catchment from nutrient pollution and supporting the ecological health of the Oder basin.

The plant discharges into a small stream that feeds the Kaczawa River, a right-bank tributary of the Oder. The Oder flows northward through western Poland and forms part of the border with Germany before reaching the Szczecin Lagoon and the Baltic Sea. The watershed supports diverse aquatic habitats and is important for migratory fish species. The plant's secondary treatment helps reduce organic load and nutrient inputs, contributing to the ecological quality of the Oder basin.