ROWP Solceta Stei Wastewater Treatment Plant, Ștei, Bihor, Romania

ROWP Solceta Stei is a municipal wastewater treatment plant located in Ștei, a town in Bihor County, Romania. The plant serves a population of approximately 8,310 residents and is part of the regional water infrastructure managed under Romanian environmental regulations. 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 of this size. With a designed capacity of 13,200 m³/day and an average discharge volume of 815.87 m³/day, the facility operates well below its capacity, indicating potential for future growth or seasonal variations. The treated effluent is discharged into local water bodies that eventually drain into the Crișul Negru River, a tributary of the Körös River system, which flows into the Tisza River and ultimately the Danube River and Black Sea. The plant plays a key role in protecting the water quality of the Crișul Negru watershed and downstream ecosystems.

The plant discharges into the Crișul Negru River basin, which flows into the Körös River system, a major tributary of the Tisza River. The Tisza then joins the Danube, which empties into the Black Sea. This watershed supports diverse aquatic life and is important for regional biodiversity. The secondary treatment provided by the plant helps reduce organic pollutants and nutrients, mitigating eutrophication risks in downstream water bodies.