ROWP SC GOSCOM ZETEA SRL - Zetea Wastewater Treatment Plant, Harghita, Romania

ROWP SC GOSCOM ZETEA SRL is a municipal wastewater treatment plant located in Zetea, Harghita County, Romania. The facility serves a population of approximately 2,995 residents, placing it in the small agglomeration category under Romanian and EU regulations. The plant is situated inland, far from coastal waters, and its operations are part of the local infrastructure managed by the commune. The plant provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The designed capacity of 2,600 m³/day and current discharge volume of 37.73 m³/day indicate that the plant operates well below its capacity, suggesting room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that eventually drain into the Târnava Mare River, a tributary of the Mureș River, 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 these rivers and the downstream environment, supporting aquatic life and preventing eutrophication in the Danube Delta and Black Sea.

The plant discharges into local streams that feed the Târnava Mare River, part of the Mureș-Tisza-Danube basin. This watershed supports diverse aquatic ecosystems and is important for migratory fish species. The Black Sea, as the final receiving water body, is sensitive to nutrient pollution, making effective secondary treatment crucial for preventing eutrophication and maintaining ecological balance.