TP 545 of Nivalan kt Wastewater Treatment Plant, Nivala, Finland

TP 545 of Nivalan kt is a municipal wastewater treatment plant located in Nivala, Pohjois-Pohjanmaa, Finland. The plant serves a population of approximately 7,600 residents, classifying it as a medium-sized agglomeration under Finnish and EU regulations. As a Finnish wastewater facility, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. Finland's national legislation enforces these standards, with oversight from regional ELY Centres (Centres for Economic Development, Transport and the Environment). The plant's treatment processes are designed to meet the required effluent quality standards. The treated effluent from the plant is discharged into local water bodies that ultimately drain into the Baltic Sea via the Gulf of Bothnia. The plant plays a key role in protecting the region's water quality and supporting the ecological health of downstream aquatic environments.

The plant discharges into the Kalajoki river basin, which flows westward into the Gulf of Bothnia, 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 treatment helps reduce nutrient loads that could contribute to eutrophication in coastal and marine waters.