Brzeznica Wastewater Treatment Plant: Serving Brzeźnica, Lesser Poland

Brzeznica is a wastewater treatment plant located in Brzeźnica, a village in the Lesser Poland Voivodeship (województwo małopolskie) of southern Poland. The plant serves a small population of 320 residents, reflecting its role in a rural community. It operates under Polish regulations that transpose the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the standard biological treatment required for all agglomerations under the EU directive. It has a designed capacity of 2000 m³/day, though current discharge volume is 45.63 m³/day, indicating significant spare capacity. Secondary treatment typically involves biological processes such as activated sludge or trickling filters. The treated effluent is discharged into local watercourses that eventually drain into the Vistula River basin, which flows northward to the Baltic Sea. The plant's operation helps protect the local environment by reducing organic pollutants and nutrients, supporting water quality in the region's rivers and downstream ecosystems.

The plant discharges into local streams that are part of the Vistula River basin, Poland's largest river system. The Vistula flows approximately 1,047 km northward to the Baltic Sea, passing through ecologically sensitive areas including the Vistula Delta and the Gulf of Gdańsk. The region supports diverse aquatic life and is an important migratory corridor for fish. Nutrient removal from wastewater is critical to prevent eutrophication in the Baltic Sea, a semi-enclosed sea already affected by excessive nitrogen and phosphorus loads.