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Home 11 July 2020
Tourism - Modern Life Organizations Municipal Enterprise for Water Supply and Sewerage Larissa

Air-Photo of the facilities of DEYAL
The building of DEYAL and the water tower
(Photo: Archive of B. Tsolakis)
The interior of the building of DEYAL
(Photo: Archive of B. Tsolakis)
The sculpture "Larissa and Penios" of the sculptor B. Grousopoulou
(Photo: Archive of B. Tsolakis)
The labs
(Photo: Archive of DEYAL)
Biological Cleaning
(Photo: Archive of DEYAL)
Water reservoirs in Mezourlo
(Photo: Archive of DEYAL)

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Municipal Water Supply and Sewerage Company of Larissa (DEYAL)
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Municipal Enterprise for Water Supply and Sewerage
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The Municipal Water Supply and Sewerage Company of Larissa (DEYAL)


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The Municipal Water Supply and Sewerage Company of Larissa (DEYAL) is the first and largest Municipal Company in the field, after EYDAP and EYAT.

DEYAL is a Legal Person governed by Private Law, with a social utility character. It took its current legal form in 1981, by virtue of the P.D. 374/10-4-1981. Ever since, its operation and organization are governed by the provisions of L. 1069/80 “on incentives for the establishment of Water Supply and Sewerage Companies”; this law specifies the scope and duties of DEYAL, namely:
• the provision of Water Supply and Sewerage, as well as
• the study, construction, maintenance, exploitation, administration and operation of water supply networks, runoff and wastewater sewerage networks and sludge and wastewater treatment units (Biological Cleaning) in the area of its competence.

The scope and duties of DEYAL have expanded, in accordance with article 2, L. 1069/80 and by virtue of the no. 12635/16-8-2005 decision of the Secretary General of the Region of Thessaly, in the management, exploitation and trade of energy sources resulting from the activities of DEYAL and from the activities of the Municipality of Larissa. The new activities of DEYAL are the production of electric power
• by exploiting the solar energy and
• by burning the Biogas deriving from the Biological Cleaning and the XYTA (Sanitary Landfill) of the Municipality of Larissa.

DEYAL supplies with water the Municipality of Larissa, the Municipal District of Terpsithea and the settlements of Koulouri and Amfithea, the Municipal District of Nikea, the Municipal District of Melissohori and part of Platykampos. The supplied water is received from the 17 bores (7 in Ampelonas, 5 in Yannouli and 5 in Platanoula), then is channeled to the reservoirs of Agia Paraskevi and Mezourlou and is distributed to the city thanks to the gravity created due to the height difference.

The annual water production exceeds the quantity of 18.000.000 m3. The water is healthy, fully tested at the Laboratories (Chemical-Microbiological) that are equipped with state of the art technology. The quality system applied by the water Quality Control Laboratory is certified by ELOT according to ΕΝ ΙSO 9001: 2000.

The Biological Cleaning has a treatment capacity of 20,000 cubic meters of wastewater per day. After the upgrade and expansion, the capacity of the network has been doubled to 40,000 cubic meters, with the possibility to serve 210,000 inhabitants.

All the Services of DEYAL are concentrated at the Aqueduct, for their better organization and operation, and also for the decentralization of the city. On the site of the Aqueduct there are the Water Tower, the Refineries, the Water Reservoirs, the Pump Station, the Laboratories (Chemical-Microbiological), the building of the Management and the surrounding area. The DEYAL premises also include the premises of Biological Cleaning, the water supply bores, the water reservoirs in Mezourlo and Agia Paraskevi and the building of Interruption in Platamonas.