Czarna Bialostocka Wastewater Treatment Plant, Jurowce, Podlaskie Voivodeship

The Czarna Bialostocka wastewater treatment plant is located in Jurowce, within the gmina Wasilków of powiat białostocki, in the Podlaskie Voivodeship of Poland. It serves a population of approximately 5,592 people, classifying it as a small to medium agglomeration under Polish and EU regulations. 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 discharging into freshwater. The designed capacity is 7,500 m³/day, with an actual discharge volume of 797.33 m³/day, indicating significant spare capacity. As a Polish facility, it operates under the national Water Law Act and is subject to environmental permits issued by the Regional Water Management Board (RZGW). The treated effluent is discharged into a local watercourse, likely a tributary of the Supraśl River, which flows into the Narew River and eventually reaches the Baltic Sea via the Vistula Lagoon. The plant plays a key role in protecting the water quality of the Narew Basin, an ecologically important area supporting diverse aquatic life and migratory bird species.

The plant discharges into a local stream that feeds into the Supraśl River, a tributary of the Narew River. The Narew flows into the Vistula Lagoon and ultimately the Baltic Sea. The surrounding watershed includes wetlands and forested areas that support biodiversity, including fish spawning grounds and bird habitats. The plant's secondary treatment helps reduce nutrient loads, mitigating eutrophication risks in downstream waters.