COV Gajary Wastewater Treatment Plant, Gajary, Bratislavský kraj, Slovakia

COV Gajary is a municipal wastewater treatment plant located in Gajary, a village in the Malacky District of Bratislavský kraj, western Slovakia. The plant serves a population of approximately 4,433, classifying it as a small agglomeration under EU standards. It operates secondary treatment, 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 6,500 cubic meters per day and currently treats an average daily flow of 907.23 cubic meters, indicating significant spare capacity. As a secondary treatment facility, it employs biological processes to reduce organic matter and suspended solids, meeting the effluent standards set by Slovak regulations transposing the EU directive. The treated effluent is discharged into local watercourses that ultimately drain into the Morava River, a major tributary of the Danube. The Morava River forms the border between Slovakia and Austria and supports diverse aquatic ecosystems. The plant's operation helps protect water quality in this transboundary river system, which is important for both ecological health and downstream water uses.

COV Gajary discharges into local streams that flow into the Morava River, which then joins the Danube River near Bratislava. The Morava River is a lowland river with extensive floodplain forests and wetlands, providing habitat for numerous fish and bird species. The Danube River is a major European waterway that ultimately reaches the Black Sea. The plant's secondary treatment reduces organic pollution, helping to maintain the ecological integrity of these downstream water bodies.