Czerwiensk Wastewater Treatment Plant - Czerwieńsk, Poland | Secondary Treatment

The Czerwiensk wastewater treatment plant is located in Czerwieńsk, a town in the lubuskie province of western Poland. It serves a population of approximately 4,031, classifying it as a small agglomeration under Polish and EU regulations. The plant operates under the framework of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for discharges into freshwater bodies from agglomerations of this size. The plant provides secondary treatment, which typically involves biological processes to remove organic matter and suspended solids. With a designed capacity of 11,000 m³/day and an actual discharge volume of 574.76 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treatment process meets the standards set by Polish environmental law, which transposes EU directives. The treated effluent is discharged into a local watercourse that ultimately drains into the Odra River basin, which flows into the Baltic Sea. The plant plays a key role in protecting the local watershed from pollution, supporting aquatic life and downstream ecosystems. Its location inland, away from the coast, reduces direct marine impact, but the Odra basin is ecologically significant for migratory fish and biodiversity.

The plant discharges into a tributary of the Odra River, which flows northward to the Baltic Sea. The Odra basin supports diverse aquatic habitats and is an important migratory corridor for fish species such as salmon and eel. The plant's secondary treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in the Baltic Sea, a sensitive marine environment.