Bartkowa Posadowa Wastewater Treatment Plant, Przydonica, Poland

Bartkowa Posadowa is a former wastewater treatment plant located in Przydonica, within the gmina Gródek nad Dunajcem in the małopolskie province of Poland. The plant was designed with an advanced treatment level and a capacity of 5,000 cubic meters per day, indicating it served a medium-sized agglomeration in the region. As a Polish plant, it operated under the national regulations implementing the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this scale, the directive requires secondary treatment as a minimum, and advanced treatment is mandated for sensitive areas. The plant's advanced treatment level suggests it was equipped to remove nutrients such as nitrogen and phosphorus, protecting the local water environment. The plant discharged into the local watershed, which ultimately drains into the Dunajec River, a tributary of the Vistula River. The Vistula flows into the Baltic Sea, making the plant's operations important for the health of the Baltic Sea ecosystem. The surrounding area is characterized by rural and agricultural land use, with the Dunajec River supporting diverse aquatic life.

The plant's receiving waters are part of the Dunajec River basin, which flows into the Vistula River and eventually the Baltic Sea. The Dunajec River is an ecologically sensitive watercourse that supports diverse aquatic life and is important for migratory fish species. The advanced treatment level at this plant would have helped reduce nutrient loading to the Baltic Sea, contributing to efforts to combat eutrophication in the marine environment.