ROWP SPGC SA Filipesti de Padure Wastewater Treatment Plant, Mărginenii de Jos, Romania

ROWP SPGC SA Filipesti de Padure is a municipal wastewater treatment plant located in Mărginenii de Jos, Prahova County, Romania. The facility serves a population of approximately 4,809, classifying it as a small agglomeration under Romanian and EU regulations. The plant is situated inland, away from coastal areas, and discharges treated effluent into local watercourses. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The designed capacity of 5,580 m³/day indicates the plant's infrastructure is sized to handle current and potential future loads, with a reported discharge volume of 268.21 m³/day. The treated effluent from the plant ultimately drains into the Prahova River basin, which flows into the Ialomița River and then into the Danube River, eventually reaching the Black Sea. This downstream connection underscores the plant's role in protecting regional water quality and the sensitive ecosystems of the Danube Delta and Black Sea coastal zone.

The plant discharges into the Prahova River basin, a tributary of the Ialomița River, which flows into the Danube River and ultimately the Black Sea. This watershed supports diverse aquatic life and is important for regional biodiversity. The Black Sea is a semi-enclosed sea with limited water exchange, making it sensitive to nutrient pollution. The plant's secondary treatment helps reduce organic load and nutrients, mitigating eutrophication risks in downstream waters.