Janow Wastewater Treatment Plant, Janów, Poland | Secondary Treatment for 5,740 Residents

Janow is a municipal wastewater treatment plant located in Janów, within the Mazowieckie Voivodeship of Poland. The facility serves a population of approximately 5,740 residents, classifying it as a small to medium agglomeration under Polish and EU regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 9,000 m³/day and an average discharge volume of 818.43 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Vistula River basin, which flows northward into the Baltic Sea. The plant plays a key role in protecting the region's surface water quality and supporting the ecological health of the Vistula catchment.

The plant discharges into the Vistula River basin, which drains into the Baltic Sea. The Vistula is Poland's largest river and supports diverse aquatic ecosystems, including important fish spawning grounds and migratory bird habitats. The secondary treatment provided helps reduce nutrient loads, mitigating eutrophication risks in the Baltic Sea.