Urban Water Agenda

Thessaloniki

Why an Urban Water Agenda 2030?

"UWA2030 can trigger the political leadership needed to promote water issues into the Urban Planning Agenda of Thessaloniki more strongly. It can foster the cooperation within the city’s water sector (i.e. between the water utility, authorities and relevant stakeholders) to achieve effective and sustainable urban water management along with climate change mitigation measures."

Yannis N. Krestenitis, President and CEO of Thessaloniki Water Supply and Sewerage Company (EYATH SA)

Thessaloniki at work | Reuse of treated wastewater

In the summer of 2007 the Water Utility of Thessaloniki (EYATH SA) became the first in Greece to run a large scale agricultural irrigation programme using treated wastewater from the Thessaloniki Wastewater Treatment Plant (ThWWTP).
The northwest area of the city is surrounded by cultivated fields. Even though the area has been irrigated for decades by the Axios River, extra water has been occasionally needed during prolonged hot summers or periods of drought. In order to foster existing water resources for other urban water needs, these extra amounts of water needed for agricultural irrigation purposes were supplied by reclamation of the treated effluent of the ThWWTP.
Thus, the main reclamation use of treated wastewater effluent had been restricted to irrigation for agriculture during the summer period of the years 2007 to 2012. The project was applied every summer in the agricultural area outside the city. In its context, around 160.000m3 of treated effluent were reclaimed for irrigation on a daily basis, during specific short periods and with no cost for the end-users. Rice, corn, and cotton were the main crops in the area where the project has been applied. The project has been carried out with the co-operation and approval of the regional environmental authority, the local farmers union and with the scientific and technical support of the National Agricultural Research Foundation.

Interested in finding out more? You can read more about the project by following this link, or by contacting the Head of Research Programme Office at Thessaloniki Water Supply and Sewerage Company, Aikaterini Christodoulou (e-mail: catchristo[at]eyath.gr)

The reclaimed treated effluent was mixed with the river water in the irrigation channel to end up at the agricultural fields

Thessaloniki's member of the UWA2030 Core Group

Aikaterini E. Christodoulou (Head of Research Programme Office at Thessaloniki Water Supply and Sewerage Company )

Caterina has 16 years of professional experience in wastewater and water quality control analysis as well as in wastewater treatment plant operation. She is involved in European Environmental and Compliance issues, through her participation in the Working Groups of the European Federation of National Associations of Water Services (EurEau).

 

Quick facts on Thessaloniki

Location within country

Thessaloniki is located in Northern Greece and stretches along the coast of Thermaikos Gulf, with 50km of coastal front. It belongs to the Hydrographical Department of Central Makedonia (GR10) and more specifically it is included in the Chalkidiki River Basin

Number of inhabitants

Municipality: 325,000 (2011)
Metropolitan Area : 790,000 (2011)

Main economic sectors

Thessaloniki is one of the most important Greek ports, as it serves the purpose of commercial trade between the Mediterranean and the Balkans.
Nowadays, in the wider area of the city there is a shift towards the tertiary economic sector (54%) with the secondary economic sector shrinking (28%) and the primary economic sector being rather stable at 18%.

Source/s of water supply

The city’s water supply demands (around 250,000 m3 daily) are covered mostly by the national river Aliakmon as well as by the natural springs of Aravissos and significantly less (2%) by the river Axios, which flows in Greece from the neighbouring county of FYROM.

Main utilities providing water and waste water services

Thessaloniki Water Supply and Sewerage company (EYATH S.A) is a semi-public water utility that provides water to the city of Thessaloniki.
EYATH S.A provides a maximum quantity of around 290,000 m3 of potable water daily, to serve the 1,050,000 inhabitants of the wider Metropolitan Area of Thessaloniki. Moreover, with its sewerage network of 1,600 km total length, 55 pump stations and 2 wastewater treatment plants, the company covers the collection, treatment and safe disposal of 190,000 m³ daily average of wastewater.

More information: www.thessaloniki.gr

Updated: September 2017