Oczyszczalnia Rudno - Secondary Wastewater Treatment Plant in Rudno, Lesser Poland

Oczyszczalnia Rudno is a municipal wastewater treatment plant located in Rudno, a village in the Lesser Poland Voivodeship (województwo małopolskie) of southern Poland. The plant serves a small population of 386 residents, reflecting its role in a rural community within the gmina of Krzeszowice, near Kraków. The plant provides secondary treatment, which is the standard level required under Polish regulations implementing the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent (PE) below 2,000. Although the designed capacity is 900 m³/day, the actual discharge volume is 55.04 m³/day, indicating the plant operates well below its capacity. Treated wastewater from the plant is discharged into a local watercourse, which ultimately drains into the Vistula River basin. The Vistula flows northward through Poland to the Baltic Sea. The plant's operations contribute to protecting the local aquatic environment and downstream ecosystems, including the Vistula estuary and the Baltic Sea, by reducing pollutant loads from the rural community.

The plant discharges into a small watercourse that is part of the Vistula River basin. The Vistula is Poland's longest river, flowing through Kraków and Warsaw before reaching the Baltic Sea via the Gdańsk Bay. The downstream environment includes ecologically sensitive areas such as the Vistula estuary, which supports diverse aquatic life and serves as an important migratory corridor for fish. The plant's secondary treatment helps reduce organic matter and suspended solids, protecting water quality in the local stream and the broader Vistula catchment.