Lubycza Krolewska Wastewater Treatment Plant - Lubycza Królewska, Poland

The Lubycza Krolewska wastewater treatment plant is located in the town of Lubycza Królewska, in województwo lubelskie, eastern Poland. The facility serves a population of approximately 2,882 residents, making it a small-scale municipal treatment plant. It is situated in a rural area near the border with Ukraine, within the historical region of Galicia. The plant provides secondary treatment, which is the standard level required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive mandates secondary treatment for all discharges from agglomerations with a population equivalent (PE) between 2,000 and 10,000, unless the receiving waters are designated as sensitive areas requiring more stringent treatment. The plant's designed capacity is 400 cubic meters per day, and the actual discharge volume is approximately 411 cubic meters per day, indicating operation near capacity. The treated effluent is discharged into local surface waters, which ultimately drain into the Bug River basin and then into the Vistula River, flowing north to the Baltic Sea. The plant plays a key role in protecting the local environment by reducing organic pollutants and nutrients from entering the watershed, supporting water quality in the region's rivers and downstream ecosystems.

The plant discharges into local streams that are part of the Bug River catchment, a major tributary of the Vistula River. The Vistula flows into the Baltic Sea, a semi-enclosed sea sensitive to eutrophication from nutrient pollution. The region's watershed supports diverse aquatic life and is important for migratory fish species. The plant's secondary treatment helps reduce biochemical oxygen demand and suspended solids, contributing to the health of downstream water bodies.