Overview
Tallinna reoveepuhastusjaam serves approximately 470,000 people in Harju maakond, Estonia. The plant is located within 50 km of the coast and discharges into the Baltic Sea catchment.
Tallinna reoveepuhastusjaam is the main wastewater treatment plant for the Tallinn metropolitan area in Harju maakond, Estonia. Serving a population of around 470,000, it is one of the largest treatment facilities in the country, handling municipal wastewater from the capital region. As a large agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC), the plant is required to provide at least secondary treatment, with more stringent tertiary treatment likely needed due to the Baltic Sea's sensitivity to nutrient pollution. The designed capacity is 1.00 (likely in million m³/year or similar), indicating a substantial infrastructure. The treated effluent ultimately reaches the Baltic Sea via local rivers and the Gulf of Finland. The Baltic Sea is a brackish, semi-enclosed sea with limited water exchange, making it highly vulnerable to eutrophication from nutrient inputs. The plant's performance is critical for reducing nitrogen and phosphorus loads to this sensitive marine environment.
Environmental context
The plant discharges into the Baltic Sea catchment, specifically the Gulf of Finland, which is part of the larger Baltic Sea basin. This sea is one of the most eutrophied in the world, with nutrient pollution from wastewater and agriculture causing algal blooms and oxygen-depleted dead zones. The plant's location within 50 km of the coast means its effluent directly impacts coastal water quality and the health of marine ecosystems, including fish spawning grounds and migratory bird habitats.
Frequently asked questions
Tallinna reoveepuhastusjaam is located in Harju maakond, Estonia, serving the Tallinn metropolitan area.
The plant serves approximately 470,612 people, making it one of the largest wastewater treatment facilities in Estonia.
The treated wastewater is discharged into the Baltic Sea catchment, likely via local rivers flowing into the Gulf of Finland.
As a large agglomeration (>150,000 population equivalent), the plant falls under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires at least secondary treatment and potentially tertiary treatment to reduce nutrients entering the sensitive Baltic Sea.
For a plant of this scale in Estonia, typical treatment includes mechanical, biological, and often chemical phosphorus removal to meet EU standards for sensitive areas like the Baltic Sea.
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