Twardogora Wastewater Treatment Plant, Twardogóra, Poland

The Twardogora wastewater treatment plant is located in Twardogóra, within the województwo dolnośląskie region of Poland. It serves a population of approximately 4,247 people, classifying it as a small agglomeration under Polish and EU regulations. The plant is situated in an inland area, away from the coast. The facility employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Its designed capacity is 14,000 m³/day, with an actual discharge volume of 605.56 m³/day, indicating significant reserve capacity. The plant operates under Poland's national water law, which implements EU directives. The treated effluent is discharged into local watercourses that eventually drain into the Oder River basin, flowing northward to the Baltic Sea. The plant plays a key role in protecting the region's surface waters from nutrient pollution, supporting aquatic life and downstream ecosystems.

The plant discharges into local streams that are part of the Oder River basin. The Oder flows through western Poland and into the Baltic Sea, a sensitive marine environment prone to eutrophication. Advanced treatment at this plant helps reduce nutrient loads, protecting downstream water quality and supporting biodiversity in the Oder estuary and Baltic coastal zone.