Andrychow Wastewater Treatment Plant, Andrychów, Lesser Poland Voivodeship

The Andrychow wastewater treatment plant is located in the town of Andrychow, within the Lesser Poland Voivodeship (województwo małopolskie) in southern Poland. The facility serves a population of approximately 16,121 residents, classifying it as a medium-sized agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated inland, away from coastal areas, and its operations are subject to Polish national regulations that implement EU water quality standards. As a plant serving a population between 10,000 and 100,000, the EU UWWTD requires at least secondary treatment (biological treatment) for such agglomerations. The facility is expected to comply with these standards, ensuring effective removal of organic matter and nutrients. The plant's design capacity and operational status are not publicly reported, but its continued service to the community indicates ongoing operation under the regulatory framework. The treated effluent from the Andrychow plant is discharged into a local watercourse that ultimately drains into the Vistula River basin, which flows northward to the Baltic Sea. The plant plays a crucial role in protecting the local watershed from untreated sewage, supporting aquatic life in the region's streams and rivers. Its operation contributes to the ecological health of the Vistula catchment area, which is vital for biodiversity and water quality in southern Poland.

The Andrychow plant discharges into a tributary of the Skawa River, which flows into the Vistula River, the longest river in Poland, eventually reaching the Baltic Sea. The local watershed supports diverse aquatic ecosystems, including fish populations and riparian habitats. The plant's treatment helps prevent nutrient pollution that could lead to eutrophication in downstream water bodies, maintaining water quality for both ecological and human uses.