Marczyce Wastewater Treatment Plant | Secondary Treatment in Lower Silesia, Poland

Marczyce wastewater treatment plant is located in the village of Marczyce, within gmina Podgórzyn, powiat karkonoski, in the Lower Silesian Voivodeship of Poland. The plant serves a population of 4,127 and operates under secondary treatment, meeting the standard requirements for smaller agglomerations in Poland. As a secondary treatment facility, Marczyce employs biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 6,002 m³/day and currently discharges 588.45 m³/day, indicating ample reserve capacity. Polish wastewater treatment plants are regulated under national law transposing the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations above 2,000 population equivalent. The treated effluent from Marczyce is discharged into local watercourses that ultimately drain into the Odra River basin and then to the Baltic Sea. The plant plays a key role in protecting the region's rivers and groundwater from pollution, supporting aquatic ecosystems and downstream water quality in the Odra catchment.

The plant discharges into local streams that feed into the Bóbr River, a tributary of the Odra River, which flows into the Baltic Sea. The Odra basin supports diverse aquatic life and is an important ecological corridor in Central Europe. The treatment plant helps reduce nutrient and organic loads, protecting downstream habitats and water quality in this sensitive river system.