Marzenin Wastewater Treatment Plant, Strugienice, Poland

Marzenin is a secondary-level wastewater treatment plant located in Strugienice, within the Łódź Voivodeship of Poland. It serves a small population of 599 residents, reflecting its role in a rural or small community setting. The plant is part of Poland's municipal wastewater infrastructure, which operates under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant's designed capacity is 2250 m³/day, with an actual discharge volume of 85.41 m³/day, indicating it operates well below its capacity. As a secondary treatment facility, it provides biological treatment to reduce organic matter and suspended solids, meeting the standard requirements for smaller agglomerations under the EU directive. It is assumed to be active given the discharge data. The treated effluent is discharged into a local water body, likely a small river or stream within the Bzura River basin, which ultimately flows into the Vistula River and then to the Baltic Sea. The plant plays a key role in protecting local water quality and supporting the ecological health of the downstream environment.

The plant discharges into a local watercourse within the Bzura River catchment, a tributary of the Vistula River. The Vistula flows northward into the Baltic Sea, a semi-enclosed sea sensitive to nutrient pollution. The surrounding area is predominantly agricultural, so the plant's secondary treatment helps reduce nutrient loads that could contribute to eutrophication in downstream waters. The local watershed supports diverse aquatic life and is part of a broader ecological network.