SLUPNO Wastewater Treatment Plant, Wykowo, Mazowieckie, Poland

SLUPNO is a wastewater treatment plant located in Wykowo, within the gmina Słupno, powiat płocki, in the Mazowieckie Voivodeship of Poland. The plant serves a population of approximately 3,350 people, classifying it as a small agglomeration under EU regulations. It is situated inland, away from coastal areas, and treats wastewater from the local community. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity of the plant is 12,918 cubic meters per day, and the current discharge volume is 477.66 cubic meters per day, indicating significant spare capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local water bodies, likely tributaries of the Vistula River, which flows through the region and ultimately drains into the Baltic Sea. The plant plays a crucial role in protecting the local watershed from pollution, supporting aquatic life and downstream ecosystems. Its operation is subject to Polish environmental regulations, which align with EU standards.

The plant discharges treated wastewater into local watercourses that are part of the Vistula River basin. The Vistula is the longest river in Poland and flows into the Baltic Sea, supporting diverse aquatic habitats and providing water for agriculture and industry. The region's watershed is ecologically sensitive, with wetlands and floodplains that rely on good water quality. The plant's secondary treatment helps reduce nutrient loads, mitigating eutrophication risks in downstream water bodies.