Zabierzów Bocheński Wastewater Treatment Plant, małopolskie, Poland

The Zabierzów Bocheński wastewater treatment plant is located in the village of Zabierzów Bocheński, within the gmina Niepołomice, powiat wielicki, in the małopolskie voivodeship of Poland. This facility serves a population of 1,736, classifying it as a small agglomeration under Polish and EU regulations. The plant provides secondary treatment, which is the minimum required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into freshwater bodies. With a designed capacity of 2,645 m³/day and an actual discharge volume of 247.53 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. 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 watershed and downstream ecosystems from untreated sewage pollution.

The plant discharges into small streams that are part of the Vistula River basin. The Vistula is Poland's longest river, flowing into the Baltic Sea via the Gulf of Gdańsk. The watershed supports diverse aquatic life and is an important ecological corridor. The plant's secondary treatment reduces organic load and suspended solids, mitigating eutrophication risks in downstream water bodies.