Gromnik Wastewater Treatment Plant, Przysietnica, Lesser Poland

Gromnik is a wastewater treatment plant located in Przysietnica, a village in the Lesser Poland Voivodeship (województwo małopolskie) of southern Poland. The facility serves a small population of 404 residents, reflecting its role in a rural community within the gmina of Stary Sącz. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent (PE) between 2,000 and 15,000. Although the population served here is below that threshold, the plant's operation aligns with national Polish regulations that mandate appropriate treatment for all discharges to protect water quality. The treated effluent is discharged at a volume of 57.60 m³ per day, with a designed capacity of 400 m³ per day. The plant is located inland, far from the coast, and likely discharges into a local stream or river that eventually drains into the Vistula basin, which flows into the Baltic Sea. The plant plays a key role in protecting local water resources and downstream ecosystems.

The plant is situated in the mountainous region of southern Poland, within the drainage basin of the Dunajec River, a tributary of the Vistula. The Vistula flows northward to the Baltic Sea, making this facility part of a larger network that influences the health of the Baltic marine environment. The local watershed supports diverse aquatic life and is important for regional biodiversity. Proper wastewater treatment here helps prevent nutrient pollution and protects downstream habitats.