Exhibition: Thessaloniki Water Supply & Sewerage Company S.A.

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Thessaloniki Water Supply & Sewerage Company S.A.

Companies and Enterprises

Contact Us: D. Spyrou,

Egnatia 127, 54635, Thessaloniki, Greece


Thessaloniki Water Supply & Sewerage Company S.A. (EYATH S.A.), a company listed on the Athens Stock Exchange since 2001, has the exclusive right to provide water supply, sanitation and wastewater treatment services to the Greater Area of Thessaloniki until 2031 and is currently providing them to more than 1.2 million citizens every day. Total number of company employees is to date 344, which are of various educational level (academic, technical and basic education) as well as highly-trained expert staff.

 Organization Activities/ Business Field 

  • Services

EYATH S.A. specialises in the design, construction, installation, operation, utilisation, management, maintenance, extension and renewal of water supply and sewerage systems. Its activities include projects such as pumping, treatment, storage, transport, distribution and water management of all types as well as collection, transport, treatment, storage and management of waste (other than toxic that is). Moreover, the company undertakes the utilisation and reuse of products from waste water treatment, while there is the provision of telecom services via the water supply and sewerage networks it operates and of the generation and sale of own-produced electricity (which can be primarily generated by utilising water from springs, dams, aqueducts and pipelines). EYATH’s competencies also include expanding to new areas or modifying water supply-sewerage systems (networks and facilities), in order improve water quality and increase the quantity supplied to consumers.

  • Research and Development

EYATH SA is, at the moment, an active partner within five research projects (three Horizon2020 one national and one transnational project). 

The company is in close cooperation with national universities and research centers by: 

-  Funding its own research projects 

-  Sponsoring of postgraduate and PhD students 

-  Disseminating data and results to researchers and to the public 

Furthermore, EYATH SA is actively taking part at the EurEau working committees and other expert working groups at national and international level

  • Pandemic’s research and innovation

As early as April 2020, EYATH S.A. has been cooperating with the interdisciplinary research team of the Aristotle University of Thessaloniki, on their research project regarding detection of SARS-CoV-2 in sewage effluents. The project apart from virus detection, focuses on the development of a sound mathematical framework, eliminating possible uncertainties caused by the adsorption of virus fragments onto the highly porous suspended solids of wastewater, thus improving method’s consistency. Samples of the influent of Thessaloniki’s Wastewater Treatment Plant are collected and analyzed at a weekly rate. Efforts are currently undertaken, to provide a more detailed spatial analysis of the virus load in different parts of the city, which is an ambitious goal, since it requires a full resolution discrete topological model within the sewerage networks.

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