Rozan Wastewater Treatment Plant, Różan, Mazovian Voivodeship, Poland

The Rozan wastewater treatment plant is located in Różan, a town in the Mazovian Voivodeship of Poland. The facility serves a population of about 10,880, classifying it as a medium-sized agglomeration under Polish and EU regulations. Its operations are integral to the local sanitation infrastructure, ensuring that domestic wastewater is properly managed before discharge. As a Polish plant, Rozan operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The directive also requires more advanced treatment if the receiving waters are designated as sensitive areas. The regulatory framework ensures that the plant meets minimum treatment standards to protect water quality. The treated effluent is discharged into local water bodies that ultimately drain into the Narew River, a major tributary of the Vistula River. The Vistula flows northward into the Baltic Sea, making the plant's performance important for downstream ecosystems. Proper treatment helps prevent nutrient pollution and protects aquatic habitats in the region.

The plant discharges into local streams that feed the Narew River, which joins the Vistula River before reaching the Baltic Sea. This watershed supports diverse aquatic life and is an important ecological corridor in central Poland. The region's water quality is influenced by agricultural runoff and municipal discharges, making effective treatment at Rozan critical for maintaining the health of downstream rivers and the Baltic Sea.