Strzegowo Wastewater Treatment Plant | Strzegowo, Poland

The Strzegowo wastewater treatment plant is located in the village of Strzegowo, within the gmina Strzegowo in powiat mławski, województwo mazowieckie, Poland. It serves a population of approximately 4,585, placing it in the small agglomeration category 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 6,500 m³/day, and the current discharge volume is 653.75 m³/day, indicating significant spare capacity. The treated effluent is discharged into a local watercourse that ultimately drains into the Wkra River, a tributary of the Narew River, which flows into the Vistula River and then to the Baltic Sea. The plant plays a key role in protecting the local watershed from untreated sewage, supporting aquatic life and downstream water quality.

The plant discharges into a small stream that flows into the Wkra River, part of the Vistula basin. The Wkra River supports diverse aquatic ecosystems and is used for recreation and fishing. Downstream, the Vistula River is a major ecological corridor in Poland, hosting migratory fish species and providing habitat for waterbirds. The Baltic Sea, the ultimate receiving water body, is sensitive to nutrient pollution, making effective treatment important for reducing eutrophication risks.