Overview
TP 376 of Lahden kt serves 150,000 people in Lahti, Finland. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
TP 376 of Lahden kt is a wastewater treatment plant located in Lahti, in the Päijät-Häme region of Finland. The facility serves a population of 150,000, classifying it as a large agglomeration under EU regulations. The plant is situated inland, approximately 50 km from the coast, and its operations are integral to the region's water management infrastructure. As a large agglomeration, the plant is required to meet the standards of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum. For sensitive areas, tertiary treatment may be required to reduce nutrient loads. The plant's designed capacity is 1.00 (likely in million cubic meters per year or similar unit), indicating a substantial treatment capability. The treated effluent is discharged into local water bodies that eventually drain into the Gulf of Finland, part of the Baltic Sea. The Baltic Sea is a brackish, semi-enclosed sea with limited water exchange, making it sensitive to nutrient pollution. The plant's performance is therefore critical for protecting downstream aquatic ecosystems and supporting regional environmental goals.
Environmental context
The plant discharges into the local watershed that flows through the Kymijoki river basin, ultimately reaching the Gulf of Finland in the Baltic Sea. The Baltic Sea is ecologically sensitive due to its brackish waters and vulnerability to eutrophication from nutrient inputs. The plant's treatment processes help reduce the load of phosphorus and nitrogen, which are key drivers of algal blooms in the region.
Frequently asked questions
TP 376 of Lahden kt is located in Lahti, in the Päijät-Häme region of Finland. The address is Nikulankuja 9, 15700 Lahti.
The plant serves a population of 150,000, classifying it as a large agglomeration under EU regulations.
The treated effluent is discharged into local water bodies that flow into the Kymijoki river basin, eventually reaching the Gulf of Finland in the Baltic Sea.
As a Finnish plant serving over 150,000 people, TP 376 of Lahden kt operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment and, in sensitive areas, tertiary treatment to reduce nutrients.
In Finland, plants of this scale typically provide secondary biological treatment, and often include nutrient removal (tertiary treatment) to meet stringent limits for phosphorus and nitrogen, especially when discharging into sensitive water bodies like the Baltic Sea.
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