Wydminy Wastewater Treatment Plant, Włosty | Poland

The Wydminy wastewater treatment plant is located in Włosty, within the gmina Biała Piska in the warmińsko-mazurskie voivodeship of Poland. It serves a population of 4,035, classifying it as a small 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 for inland freshwater discharges. As a secondary treatment facility, the plant employs biological processes to reduce organic matter and suspended solids. Its designed capacity of 5,336 m³/day significantly exceeds the current average daily flow of 575.33 m³/day, indicating ample reserve capacity for future growth or seasonal variations. The plant operates under Poland's implementation of the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations with a population equivalent above 2,000 discharging into freshwater. The treated effluent is discharged into local watercourses that eventually drain into the Pisa River, a tributary of the Narew River, which flows into the Vistula River and ultimately reaches the Baltic Sea. The plant plays a key role in protecting the region's surface waters from nutrient pollution, supporting aquatic life in the downstream river systems.

The Wydminy plant discharges into local streams that feed the Pisa River, part of the Narew basin, which flows into the Vistula and then the Baltic Sea. This watershed supports diverse aquatic habitats and is important for migratory fish species. The plant's secondary treatment helps reduce organic loading and nutrient inputs, mitigating eutrophication risks in downstream water bodies.