ROWP Primaria Sita Buzaului Wastewater Treatment Plant, Sita Buzăului, Covasna, Romania

ROWP Primaria Sita Buzaului is a municipal wastewater treatment plant located in Merișor, Sita Buzăului, Covasna County, Romania. The plant serves a population of 1,269 and operates with secondary treatment, discharging an average of 134.29 cubic meters per day. Its designed capacity is 3,850 cubic meters per day, indicating significant reserve capacity for future growth. As a secondary treatment facility, the plant meets the minimum requirements under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent between 2,000 and 10,000. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant's capacity utilization is low, suggesting it handles a fraction of its potential load. The plant's treated effluent is discharged into a local watercourse within the Olt River basin, which flows southward through Romania to the Danube River and eventually the Black Sea. The surrounding area is rural and mountainous, part of the Carpathian region, with sensitive aquatic ecosystems that benefit from proper wastewater treatment. The plant plays a key role in protecting local streams and downstream water quality.

The plant discharges into a tributary of the Olt River, which flows into the Danube and ultimately the Black Sea. The Olt basin supports diverse aquatic life and is ecologically sensitive due to its mountainous terrain and forested catchments. Proper treatment helps prevent nutrient pollution and protects downstream habitats, including the Danube Delta, a major ecological zone.