Lososina Dolna Wastewater Treatment Plant, Bilsko, Poland

Lososina Dolna is a wastewater treatment plant located in Bilsko, within the gmina of Łososina Dolna in the małopolskie province of southern Poland. The plant serves a population of approximately 600 residents, providing secondary treatment for the local community. As a secondary treatment facility, Lososina Dolna meets the standard requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations under 2,000 population equivalent. The plant has a designed capacity of 1,401 m³/day and currently treats an average daily flow of 85.41 m³/day, indicating ample reserve capacity for future growth. The treated effluent is discharged into a local watercourse that ultimately drains into the Dunajec River, a tributary of the Vistula River. The Vistula flows northward through Poland to the Baltic Sea. The plant plays a key role in protecting the local watershed and downstream aquatic ecosystems from untreated wastewater pollution.

The plant discharges into a small stream that feeds into the Dunajec River, which flows through the Carpathian foothills before joining the Vistula River. The Vistula is Poland's longest river and empties into the Baltic Sea via the Gdańsk Bay. The local watershed supports diverse freshwater habitats, including fish spawning grounds and riparian zones that are important for migratory birds. The plant's secondary treatment helps reduce nutrient loads and organic pollution, safeguarding water quality in this ecologically sensitive region.