Laszczow Wastewater Treatment Plant, Dobużek, Poland

The Laszczow wastewater treatment plant is located in Dobużek, a village in the gmina of Łaszczów, within the powiat tomaszowski of województwo lubelskie, Poland. This facility serves a population of approximately 1,390 residents, reflecting its role in managing domestic wastewater for a small rural community. The plant operates with secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent between 2,000 and 10,000. Secondary treatment typically involves biological oxidation and sedimentation to reduce organic matter and suspended solids. The designed capacity of 2,857 m³/day indicates the plant's potential to handle higher flows, while the current discharge volume of 198.19 m³/day suggests it is operating well below its design capacity. The treated effluent is discharged into a local watercourse, which eventually drains into the Bug River basin, a tributary of the Narew River and ultimately the Vistula River, which flows into the Baltic Sea. The plant's inland location, more than 50 km from the coast, reduces direct marine impact. The surrounding region is predominantly agricultural, and the plant helps protect local streams and groundwater from untreated sewage, supporting the ecological health of the Bug River catchment.

The plant discharges into a local watercourse that flows into the Bug River, a major tributary of the Narew River, which joins the Vistula River before reaching the Baltic Sea. The Bug River basin supports diverse aquatic life and is an important ecological corridor in eastern Poland. The plant's secondary treatment helps reduce nutrient loads, protecting downstream water quality in this sensitive river system.