GREVENA
Γρεβενά, Αποκεντρωμένη Διοίκηση Ηπείρου - Δυτικής Μακεδονίας
The GREVENA wastewater treatment plant serves the city of Grevena in western Macedonia, Greece, with a population equivalent of 19,800. It operates under the EU Urban Waste Water Treatment Directive.