Overview
TP 709 of Riihimaen kt is a municipal wastewater treatment plant in Riihimäki, Kanta-Häme, Finland, serving approximately 84,500 people. It operates under Finland's implementation of the EU Urban Waste Water Treatment Directive.
TP 709 of Riihimaen kt is a municipal wastewater treatment plant located in Riihimäki, within the Kanta-Häme region of southern Finland. The facility serves an estimated population of 84,500, classifying it as a medium-to-large agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated inland, approximately 50 km from the coast, and its operations are integrated into the regional wastewater infrastructure managed by the city of Riihimäki. As a plant serving over 10,000 population equivalents in Finland, TP 709 of Riihimaen kt is subject to the EU UWWTD, which mandates secondary treatment as a minimum standard. For agglomerations of this scale, the directive also requires appropriate treatment to meet effluent quality standards for biochemical oxygen demand, chemical oxygen demand, and total suspended solids. The plant's treatment processes are designed to comply with these regulatory requirements, ensuring effective removal of pollutants before discharge. The treated effluent from the plant is discharged into local water bodies that ultimately drain into the Gulf of Finland via the Vantaa River system. The receiving waters support diverse aquatic life and are part of a broader watershed that includes sensitive ecosystems. The plant plays a critical role in protecting downstream water quality and maintaining the ecological health of the region's rivers and coastal areas.
Environmental context
The plant discharges into the local river network, which flows into the Vantaa River and eventually reaches the Gulf of Finland, a part of the Baltic Sea. The Baltic Sea is a brackish water body with limited water exchange, making it sensitive to nutrient pollution. The plant's treatment helps reduce the load of nutrients and organic matter, supporting the ecological balance of downstream aquatic habitats and mitigating eutrophication risks in the coastal zone.
Frequently asked questions
TP 709 of Riihimaen kt is located in Riihimäki, in the Kanta-Häme region of southern Finland. The plant's address is Pajakatu, Parooninmäki, Riihimäki.
The plant serves approximately 84,500 people, classifying it as a medium-to-large agglomeration under the EU Urban Waste Water Treatment Directive.
The treated effluent is discharged into local water bodies that flow into the Vantaa River system, which ultimately drains into the Gulf of Finland.
As a Finnish plant serving over 10,000 people, TP 709 of Riihimaen kt operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment and compliance with effluent quality standards.
In Finland, plants serving agglomerations of this size are required to provide at least secondary treatment under the EU UWWTD. Many also incorporate nutrient removal to protect the sensitive Baltic Sea environment.
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