Debe Wielkie Wastewater Treatment Plant, Wójtostwo, Mazowieckie, Poland

The Debe Wielkie wastewater treatment plant is located in Wójtostwo, within the Kozienice commune in Mazowieckie Voivodeship, Poland. It serves a population of approximately 4,192 and is designed to handle up to 6,000 m³ of wastewater per day. The plant operates under Polish regulations that transpose the EU Urban Waste Water Treatment Directive, which requires secondary treatment for agglomerations of this size. The plant provides secondary treatment, which typically involves biological processes to reduce organic matter and suspended solids. The current discharge volume is 597.71 m³/day, indicating a utilization rate well below capacity. As a Polish facility, it is subject to national water law and permits issued by the Regional Water Management Board, ensuring compliance with effluent standards. The treated effluent is discharged into local watercourses that eventually drain into the Vistula River basin. The Vistula flows northward through Poland to the Baltic Sea, making the plant's performance important for downstream water quality. The surrounding area is a mix of agricultural and forested land, with the Kozienice Forest nearby, supporting diverse aquatic and terrestrial ecosystems.

The plant discharges into local streams that are part of the Vistula River basin. The Vistula is Poland's largest river, flowing into the Baltic Sea via the Gulf of Gdańsk. The downstream environment includes ecologically sensitive areas such as the Vistula estuary, which supports migratory fish species and diverse bird populations. Proper wastewater treatment is essential to prevent nutrient pollution that could lead to eutrophication in the Baltic Sea.