Zaenowica Wastewater Treatment Plant, Golesze Duże, Poland

The Zaenowica wastewater treatment plant is located in Golesze Duże, a village in the Łódź Voivodeship of central Poland. It serves a small population of 649 people, reflecting its role in a rural community. The plant is part of the municipal infrastructure managed by the local gmina (municipality) of Wolbórz. The plant provides secondary treatment, which is the standard required under Polish regulations for smaller agglomerations. With a designed capacity of 3,500 m³/day and an actual discharge volume of 92.54 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variations. Polish wastewater treatment plants are regulated under national law transposing the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations above 2,000 population equivalent. The treated effluent is discharged into local watercourses that eventually drain into the Pilica River, a tributary of the Vistula River, which flows into the Baltic Sea. The plant plays a key role in protecting the local watershed from nutrient pollution and safeguarding downstream aquatic ecosystems.

The plant discharges into local streams that feed into the Pilica River, a major tributary of the Vistula River. The Vistula flows northward into the Baltic Sea, making the plant part of a large transboundary basin. The surrounding region is predominantly agricultural, so the plant helps reduce nutrient loads that could otherwise contribute to eutrophication in the Baltic Sea. The local watershed supports diverse aquatic life and is an important ecological corridor.