UWWTP Mezdra - Municipal Wastewater Treatment Plant in Mezdra, Bulgaria

UWWTP Mezdra is a municipal wastewater treatment plant located in the industrial zone of Mezdra, a town in Vratsa Province, northwestern Bulgaria. The plant serves the local population as part of the country's wastewater infrastructure. As a Bulgarian facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this scale. Bulgaria has transposed the directive into national law, and plants are subject to compliance monitoring by the Ministry of Environment and Water. The treated effluent is discharged into a local watercourse that ultimately drains into the Iskar River, a tributary of the Danube. The Danube then flows into the Black Sea, making the plant part of a large transboundary river basin that supports diverse aquatic ecosystems.

The plant discharges into a local stream that flows into the Iskar River, a major tributary of the Danube River. The Danube carries water through several countries before reaching the Black Sea. This watershed supports diverse aquatic life and is an important ecological corridor. Proper treatment helps protect downstream water quality and the sensitive Black Sea coastal environment.