Pokoj Wastewater Treatment Plant, Pokój, Opole Voivodeship, Poland

The Pokoj wastewater treatment plant is located in the village of Pokój, within the Opole Voivodeship of southwestern Poland. It serves a small population of 465 residents, reflecting the rural character of the area. The facility is part of Poland's municipal wastewater infrastructure, which is regulated under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the minimum standard required under the EU directive for agglomerations of this size. With a designed capacity of 1666 m³/day and an actual discharge volume of 66.30 m³/day, the plant operates well below its capacity, indicating potential for future growth. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local watercourses that eventually drain into the Oder River basin, which flows north to the Baltic Sea. The plant plays a key role in protecting the local environment by reducing nutrient and pollutant loads, supporting water quality in the region's rivers and downstream ecosystems.

The plant discharges into small streams within the Oder River basin, which flows through western Poland and into the Baltic Sea. The Oder basin supports diverse aquatic life and is an important migratory corridor for fish. The region's agricultural and forested landscape means that nutrient management from wastewater is critical to prevent eutrophication in downstream waters, including the Baltic Sea, which is sensitive to nitrogen and phosphorus inputs.