ROWP Ulmeni Wastewater Treatment Plant, Ulmeni, Maramureș, Romania

ROWP Ulmeni is a municipal wastewater treatment plant located in Ulmeni, Maramureș County, Romania. It serves a population of approximately 1,594 residents, classifying it as a small agglomeration under Romanian and EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the regional water management infrastructure. The plant provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 6,000 m³/day and an actual discharge volume of 102.46 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into a local water body, which ultimately drains into the Someș River basin and then into the Tisza River, a major tributary of the Danube. The Danube River flows into the Black Sea, making the plant's discharge part of a large transboundary watershed. The plant plays a role in protecting downstream water quality and aquatic ecosystems in the region.

ROWP Ulmeni discharges treated wastewater into a local watercourse that flows into the Someș River, a tributary of the Tisza River, which joins the Danube River before reaching the Black 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, contributing to the ecological health of downstream water bodies, including the Danube Delta, a sensitive ecosystem.