Lagow Wastewater Treatment Plant, Stare Żukowice, Poland

The Lagow wastewater treatment plant is located in Stare Żukowice, within the gmina Lisia Góra, powiat tarnowski, in the małopolskie province of Poland. It serves a population of 1,041, classifying it as a small agglomeration under Polish regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size, ensuring effective removal of organic matter and suspended solids. As a small-scale facility, the Lagow plant operates under Poland's implementation of the EU directive, which mandates secondary treatment for all agglomerations above 2,000 population equivalent (PE) discharging into freshwater. For smaller plants like this, secondary treatment is still typical to protect local water quality. The plant's designed capacity is 4,378 cubic meters per day, with a current discharge volume of 148.43 cubic meters per day, indicating ample capacity for future growth. The treated effluent from the Lagow plant is discharged into local watercourses that eventually drain into the Vistula River basin, Poland's largest river system. The Vistula flows northward into the Baltic Sea, making the plant's operations important for the ecological health of both local streams and the broader Baltic catchment. The region's agricultural landscape benefits from the plant's pollution control, which helps maintain water quality for downstream communities and ecosystems.

The Lagow plant discharges into local tributaries of the Dunajec River, which flows into the Vistula River and ultimately reaches the Baltic Sea. The surrounding area is predominantly agricultural, and the plant's secondary treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in downstream water bodies. The Vistula basin supports diverse aquatic life and is an important migratory corridor for fish species.