Stubno Wastewater Treatment Plant | Podkarpackie, Poland

The Stubno wastewater treatment plant is located in the village of Stubno, within gmina Radymno, powiat jarosławski, in the Podkarpackie Voivodeship of southeastern Poland. This facility serves a population of 1,883, classifying it as a small agglomeration under Polish and EU regulations. The plant operates secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into freshwater bodies from agglomerations of this size. As a secondary treatment facility, Stubno removes biodegradable organic matter and suspended solids through biological processes, meeting the effluent quality standards set by Polish law and the EU directive. The plant's designed capacity of 2,638 m³/day indicates it has headroom for future growth, while current discharge volume is 268.49 m³/day. The facility is operated as part of the municipal wastewater infrastructure for the Stubno area. The treated effluent from Stubno likely discharges into a local watercourse that drains into the San River, a major tributary of the Vistula River, which ultimately flows into the Baltic Sea. The plant plays a key role in protecting the local watershed and downstream aquatic ecosystems from untreated sewage pollution.

The Stubno plant discharges into a local stream that feeds into the San River, a significant waterway in southeastern Poland. The San River flows into the Vistula, which empties into the Baltic Sea. This watershed supports diverse aquatic life and is important for regional biodiversity. The plant's secondary treatment helps reduce organic pollution and nutrient loads, protecting downstream water quality in the San and Vistula basins.