Elektrenu Vievio aglomeracija Wastewater Treatment Plant, Obeniai, Lithuania

Elektrenu Vievio aglomeracija is a wastewater treatment plant located in Obeniai, within the Elektrėnų savivaldybė of Vilniaus apskritis, Lithuania. The plant serves a population of approximately 11,400, placing it in the medium agglomeration category under EU classification. As a Lithuanian facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The plant's treated effluent likely discharges into local watercourses that drain into the Neris River basin, eventually reaching the Baltic Sea. The surrounding area is characterized by mixed agricultural and forested landscapes, with the plant playing a key role in protecting local water quality and downstream ecosystems.

The plant's discharge enters local streams that flow into the Neris River, a major tributary of the Nemunas River, which ultimately drains into the Curonian Lagoon and the Baltic Sea. This watershed supports diverse aquatic life and is an important migratory corridor for fish. The region's agricultural runoff and urban wastewater necessitate effective treatment to prevent eutrophication in the sensitive Baltic Sea ecosystem.