Wolka Wastewater Treatment Plant, Wólka, Poland

The Wolka wastewater treatment plant is located in the village of Wólka, within the gmina Serokomla, powiat łukowski, in the Lubelskie Voivodeship of eastern Poland. It serves a small population of 41 people, reflecting its role in a rural community. The plant is part of Poland's municipal wastewater infrastructure, which operates under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the standard required by the EU directive for discharges into freshwater bodies from agglomerations of this size. With a designed capacity of 205 m³/day and an actual discharge volume of 5.85 m³/day, the plant operates well below its capacity, indicating it is sized for potential future growth or seasonal peaks. The treated effluent is discharged into local watercourses that ultimately drain into the Vistula River basin, which flows northward into the Baltic Sea. The plant's operation helps protect the local watershed and downstream aquatic ecosystems from untreated wastewater pollution, supporting water quality in the region's rivers and the Baltic Sea.

The plant discharges into local streams that are part of the Vistula River basin, Poland's largest river system, which flows into 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 Baltic Sea is particularly sensitive to nutrient pollution, making effective treatment at even small plants important for regional water quality.