Chorula Wastewater Treatment Plant, Gogolin, Opole Voivodeship, Poland

Chorula is a wastewater treatment plant located in Gogolin, within the Opole Voivodeship of Poland. It serves a population of approximately 4,553 people, classifying it as a small agglomeration under Polish and EU regulations. The plant is situated in an inland area, away from coastal zones. The facility provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 7,500 m³/day and an average discharge volume of 649.19 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local water bodies that eventually drain into the Oder River basin. The Oder River flows northward to the Baltic Sea, making the plant's performance important for downstream water quality. The region's aquatic ecosystems benefit from the secondary treatment level, which reduces organic pollutants and supports ecological balance.

The plant discharges into the Oder River basin, which flows through southwestern Poland and ultimately reaches the Baltic Sea. The Oder River supports diverse aquatic life and is an important migratory corridor for fish species. The secondary treatment provided by Chorula helps reduce nutrient and organic loads, protecting downstream habitats and contributing to the ecological health of the Baltic Sea catchment area.