Piecki Wastewater Treatment Plant - Secondary Treatment in Warmian-Masurian Voivodeship

The Piecki wastewater treatment plant is located in the town of Piecki, within the Warmian-Masurian Voivodeship of northeastern Poland. This facility serves a population of approximately 2,698 residents, reflecting its role as a small-scale municipal treatment plant in a rural region. The plant is situated on Osiedle Lawendowe and operates under Polish environmental regulations, which align with the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, a standard requirement under the EU directive for agglomerations of this size. With a designed capacity of 11,000 m³/day and a current discharge volume of 384.69 m³/day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local water bodies, likely tributaries of the Krutynia River or other streams in the Masurian Lake District. This region is known for its numerous lakes and ecologically sensitive aquatic habitats. The plant's operation helps protect downstream water quality, supporting biodiversity in the area's interconnected lake and river systems.

The plant discharges into the local watershed, which is part of the Masurian Lake District, a region characterized by numerous glacial lakes and rivers. The treated effluent flows into tributaries of the Krutynia River, which eventually drains into the Śniardwy Lake, the largest lake in Poland, and then via the Pisa River to the Narew and Vistula Rivers, ultimately reaching the Baltic Sea. This watershed supports diverse aquatic life, including fish species such as pike and perch, and is an important area for migratory birds.