VILIA Wastewater Treatment Plant, Vilia, Attica, Greece

VILIA is a wastewater treatment plant located in the community of Vilia, within the Municipality of Mandra-Eidyllia in West Attica, Greece. The plant serves a population of approximately 2,110 people and is part of the regional wastewater infrastructure for the Attica region. It operates under Greece's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment levels for agglomerations of this size. The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. With a designed capacity of 10,833 m³ per day and an average daily flow of 715.46 m³, the facility operates well below its capacity, indicating potential for future growth or seasonal variations. The advanced treatment level exceeds the EU's minimum requirement of secondary treatment for inland plants serving fewer than 10,000 people. The treated effluent is discharged into a local watercourse that eventually drains into the Gulf of Corinth via the Saronic Gulf. The plant plays a crucial role in protecting the local watershed and downstream marine environment from nutrient pollution and pathogens. Its advanced treatment helps maintain water quality in the region, which supports diverse aquatic life and recreational uses.

The plant discharges into a local stream that flows into the Gulf of Corinth, a semi-enclosed basin of the Ionian Sea. This coastal area supports diverse marine ecosystems, including seagrass meadows and fish nurseries. The advanced treatment reduces nutrient loads, helping to prevent eutrophication in the sensitive marine environment. The watershed is also important for local agriculture and tourism.