UWWTP Žalec Kašaze - Wastewater Treatment Plant in Griže, Žalec, Slovenia

UWWTP Žalec Kašaze is a municipal wastewater treatment plant located in Griže, near the town of Žalec in central Slovenia. The plant serves a population equivalent of 31,645, classifying it as a medium-sized agglomeration under EU regulations. Its location in the Savinja River basin places it within a region known for agriculture and hop cultivation. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent between 10,000 and 150,000 are required to provide secondary treatment or equivalent. For plants discharging into sensitive areas, more stringent tertiary treatment may be necessary. The regulatory framework ensures compliance with national and EU standards. The treated effluent is discharged into the Savinja River, which flows into the Sava River, a major tributary of the Danube. The Danube ultimately drains into the Black Sea, making this plant part of a large transboundary river basin. The Savinja River supports diverse aquatic life and is important for regional water quality.

The plant discharges into the Savinja River, a tributary of the Sava River, which flows into the Danube River and eventually the Black Sea. The Savinja River basin is ecologically sensitive, supporting diverse aquatic habitats and serving as a corridor for migratory fish species. The region's agricultural activities, particularly hop farming, require careful management of nutrient loads to prevent eutrophication in downstream waters.