Oczyszczalnia sciekow w Kaldowie Wsi - Malbork Wastewater Treatment Plant

Oczyszczalnia sciekow w Kaldowie Wsi is a wastewater treatment plant located in the village of Kałdowo, within the Malbork commune in northern Poland. It serves a population of around 81,661, classifying it as a medium-to-large agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated near the Nogat River, a distributary of the Vistula River, and plays a key role in protecting the local water environment. Under the EU UWWTD, agglomerations of this size are required to provide at least secondary treatment, with tertiary treatment mandated if the receiving waters are designated as sensitive areas. Poland has implemented the directive through national regulations, and plants serving over 10,000 population equivalent (PE) must meet strict effluent standards. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day or similar units), indicating a substantial infrastructure investment. The treated effluent from the plant is discharged into the Nogat River, which flows into the Vistula Lagoon and ultimately the Baltic Sea. This water body chain is ecologically sensitive, supporting diverse aquatic life and serving as a migratory corridor for fish species. The plant's operation is critical for reducing nutrient loads and preventing eutrophication in the lagoon and Baltic Sea.

The plant discharges into the Nogat River, a distributary of the Vistula River that flows into the Vistula Lagoon and then the Baltic Sea. This watershed is part of the larger Vistula basin, which drains a significant portion of Poland. The Vistula Lagoon is a shallow coastal lagoon that supports diverse aquatic life, including fish and bird species, and is an important stopover for migratory waterfowl. Nutrient pollution from wastewater can contribute to eutrophication, making effective treatment essential for maintaining water quality in this sensitive ecosystem.