Malczyce Wastewater Treatment Plant, Malczyce, Poland

Malczyce wastewater treatment plant is located in the town of Malczyce, within województwo dolnośląskie (Lower Silesian Voivodeship) in southwestern Poland. The facility serves a population of approximately 2,707 residents, classifying it as a small agglomeration under Polish and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into freshwater bodies. With a designed capacity of 5,900 m³/day and an actual discharge volume of 385.98 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into a local watercourse that ultimately drains into the Oder River basin, which flows northward to the Baltic Sea. The plant plays a key role in protecting the local aquatic environment and downstream ecosystems from untreated wastewater pollution.

The Malczyce plant discharges into a tributary of the Oder River, which flows through western Poland and into the Baltic Sea. The Oder basin supports diverse aquatic life and is an important ecological corridor for migratory fish. The plant's secondary treatment helps reduce organic load and nutrient pollution, contributing to the health of downstream waters and the Baltic Sea, which is sensitive to eutrophication.