Miejska Oczyszczalnia sciekow - Closed Wastewater Treatment Plant in Raciąż, Poland

Miejska Oczyszczalnia sciekow is a municipal wastewater treatment plant located in Raciąż, a town in the Mazovian Voivodeship of Poland. The plant served a population of 2,110 and had a designed capacity of 4,700 m³/day, with a discharge volume of 300.85 m³/day. It is currently closed. The plant provided secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. In Poland, such plants are typically regulated by the National Water Management Authority (PGW Wody Polskie) and must comply with national effluent standards aligned with EU directives. The treated wastewater was discharged into local water bodies that eventually drain into the Vistula River basin, which flows northward into the Baltic Sea. The plant's operation contributed to protecting the local aquatic environment from untreated sewage, supporting water quality in the region's rivers and streams.

The plant discharged into the Vistula River basin, which drains into the Baltic Sea. The local watershed supports diverse aquatic life and is part of a region with agricultural and rural land use. Proper wastewater treatment is essential to prevent nutrient pollution and protect downstream ecosystems, including the Baltic Sea, which is sensitive to eutrophication.