COV Velka Maca Wastewater Treatment Plant, Veľká Mača, Slovakia

COV Velka Maca is a municipal wastewater treatment facility located in Veľká Mača, a village in the Galanta District of Trnavský kraj, western Slovakia. The plant serves a small population of 267 residents and has a designed capacity of 200 cubic meters per day, with an average discharge volume of 54.64 cubic meters per day. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent below 2,000. This level of treatment effectively removes organic matter and suspended solids, ensuring compliance with EU effluent quality standards. The treated wastewater is discharged into local surface waters that drain into the Váh River basin, a major tributary of the Danube River. The Váh River flows into the Danube, which ultimately reaches the Black Sea. The plant plays a role in protecting the water quality of these downstream ecosystems.

The plant discharges into the Váh River basin, which flows into the Danube River and eventually the Black Sea. This watershed supports diverse aquatic life and is an important ecological corridor in Central Europe. The secondary treatment helps reduce nutrient and organic pollution, safeguarding the river's ecological health.