THERMI Wastewater Treatment Plant, Thermi, Central Macedonia, Greece

THERMI is a wastewater treatment plant located in Thermi, a municipality within the Metropolitan Area of Thessaloniki in Central Macedonia, Greece. The plant serves a population equivalent of 15,000, classifying it as a medium agglomeration under EU regulations. As a Greek facility, THERMI operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. Greece has implemented the directive through national legislation, and plants like THERMI are subject to regular monitoring and permitting by the Hellenic Ministry of Environment and Energy. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Thermaic Gulf of the Aegean Sea. This coastal region supports diverse marine life and is an important ecological area. The plant's proximity to the coast (within 50 km) underscores the need for effective treatment to protect the marine environment from nutrient pollution and other contaminants.

THERMI discharges into the local drainage network that flows into the Thermaic Gulf, a semi-enclosed embayment of the Aegean Sea. The gulf supports important fisheries and marine biodiversity, including seagrass meadows and migratory fish species. As a coastal discharge, the plant's effluent must meet stringent standards to prevent eutrophication and protect the sensitive marine ecosystem. The broader region includes the Axios River delta, a major wetland complex that provides habitat for numerous bird species.