Overview
Viljandi reoveepuhasti Kosti serves approximately 18,950 people in Võhma, Estonia. The plant operates under Estonia's national regulations aligned with the EU Urban Waste Water Treatment Directive.
Viljandi reoveepuhasti Kosti is a municipal wastewater treatment plant serving the town of Võhma in Viljandi County, Estonia. The facility handles wastewater from a population equivalent of around 18,950, placing it in the medium agglomeration category under EU classification. As an Estonian plant, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size discharging into freshwater. Estonia's national implementation ensures compliance with EU standards for nutrient removal in sensitive areas, including the Baltic Sea catchment. The plant's treated effluent ultimately drains into the Baltic Sea via local rivers and the Gulf of Riga. The Baltic Sea is a brackish, semi-enclosed sea with limited water exchange, making it sensitive to nutrient pollution. Proper treatment at plants like Viljandi reoveepuhasti Kosti helps protect this ecologically important marine environment from eutrophication.
Environmental context
The plant discharges into the local watershed that flows through the Põltsamaa River system, part of the larger Narva River basin, which drains into the Gulf of Finland and the Baltic Sea. The Baltic Sea is a highly sensitive brackish environment prone to eutrophication from nutrient inputs. Effective wastewater treatment is critical to reducing nitrogen and phosphorus loads that fuel algal blooms and oxygen depletion in this semi-enclosed sea.
Frequently asked questions
Viljandi reoveepuhasti Kosti is located in Võhma, a town in Põhja-Sakala Parish, Viljandi County, Estonia. The address is Kallase, Põltsamaa , Võhma, Koksvere, Koksvere küla.
The plant serves a population equivalent of approximately 18,950 people, classifying it as a medium-sized agglomeration under EU wastewater treatment standards.
The treated effluent is discharged into the local watershed, which flows into the Põltsamaa River system and eventually reaches the Baltic Sea via the Gulf of Finland.
As an Estonian plant, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which mandates secondary treatment for agglomerations of this size discharging into freshwater. Estonia's national regulations implement these standards.
Under the EU Urban Waste Water Treatment Directive, agglomerations between 10,000 and 150,000 population equivalent require secondary treatment. For discharges into sensitive areas like the Baltic Sea catchment, more advanced treatment for nutrient removal may be required.
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