ROWP SC HARVIZ SA sector Sanmartin Wastewater Treatment Plant, Cozmeni, Harghita, Romania

ROWP SC HARVIZ SA sector Sanmartin is a municipal wastewater treatment plant located in Cozmeni, Harghita County, Romania. The facility serves a small population of approximately 305 residents, reflecting its role in a rural or peri-urban setting within the Carpathian region. 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 with a population equivalent below 10,000. With a designed capacity of 1,200 cubic meters per day, the plant is appropriately scaled for its service area, ensuring compliance with national and EU environmental standards. The treated effluent is discharged into local surface waters, which ultimately drain into the Olt River basin and then into the Danube River. This contributes to the protection of downstream ecosystems, including the Danube Delta, a region of high ecological importance. The plant's operation helps maintain water quality in a watershed that supports diverse aquatic life and agricultural activities.

The plant discharges into the Olt River basin, which flows southward to join the Danube River. The Danube then empties into the Black Sea via the Danube Delta, a vast wetland complex that supports rich biodiversity, including migratory birds and fish species. The secondary treatment provided by the plant reduces organic pollutants and suspended solids, helping to protect these downstream environments from eutrophication and other water quality issues.