COV Trstice Wastewater Treatment Plant | Trstice, Trnavský kraj, Slovakia

COV Trstice is a municipal wastewater treatment plant located in the village of Trstice, in the Galanta district of Trnavský kraj, western Slovakia. The plant serves a population of approximately 2,002, classifying it as a small agglomeration under EU standards. It operates as a secondary treatment facility, which is the minimum required by the EU Urban Waste Water Treatment Directive for freshwater discharges from settlements of this size. The plant has a designed capacity of 4,000 cubic meters per day and reports an average discharge volume of about 410 cubic meters per day, indicating it operates well below its design capacity. As a secondary treatment plant, it uses biological processes to reduce organic matter and suspended solids, meeting the effluent quality standards set by Slovak regulations under the EU directive. The treated effluent is discharged into local streams that eventually flow into the Danube River basin, which drains into the Black Sea. The plant plays a key role in protecting the water quality of the surrounding agricultural landscape and the downstream aquatic ecosystems, including the Danube's extensive delta and coastal environment.

COV Trstice discharges into small watercourses in the Danube River basin, which flows southeast through Slovakia, Hungary, and into the Black Sea via the Danube Delta. The local watershed supports agricultural land and diverse freshwater habitats. The plant's secondary treatment helps reduce nutrient loading, which is critical for preventing eutrophication in downstream water bodies, including the ecologically sensitive Danube Delta.