Mazeikiu aglomeracija Wastewater Treatment Plant, Židikų seniūnija, Lithuania

Mazeikiu aglomeracija is a wastewater treatment plant located in Židikų seniūnija, Mažeikių rajono savivaldybė, Telšių apskritis, Lithuania. It serves a population of 55,000, classifying it as a large agglomeration under EU standards. The plant is situated inland, more than 50 km from the coast, and its operations are part of the municipal wastewater infrastructure for the region. As a facility serving over 50,000 people, Mazeikiu aglomeracija is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive requires secondary treatment for all agglomerations above 2,000 population equivalent, with more stringent tertiary treatment in sensitive areas. The regulatory framework ensures compliance with EU standards for nutrient removal and effluent quality. The plant discharges treated wastewater into local water bodies that ultimately drain into the Baltic Sea via the Venta River basin. The Venta River flows through Lithuania and Latvia before reaching the Baltic, supporting diverse aquatic ecosystems. The plant's operations contribute to protecting downstream water quality in this ecologically sensitive region.

Mazeikiu aglomeracija discharges into the Venta River basin, which flows northwest through Lithuania and Latvia into the Baltic Sea. The Venta River supports diverse aquatic life and is an important migratory corridor for fish species. The Baltic Sea is a semi-enclosed brackish sea with limited water exchange, making it sensitive to nutrient pollution. Effective wastewater treatment at this plant helps reduce eutrophication risks in the downstream environment.