I accept the use of cookies

About our Cookie Policy


Welcome to EYDAP's website, the largest company in Greece in the water supply, sewerage and wastewater treatment sector, covering the needs of more than 40% of the country's population, supplying Attica with drinking water, the quality of which is among the best in Europe.

More about EYDAP

EYDAP was founded in 1980 following the merger of the Greek Water Company of the Cities of Athens - Piraeus and the surrounding areas and the Sewerage Organization of the Capital. It took its present legal form in 1999, when the main assets of the Company,namely the dams, reservoirs, external aqueducts and pumping stations, were absorbed by the EYDAP Asset Company, remaining in the ownership of the Greek State. In January 2000, EYDAP was listed on the main market of the Athens Stock Exchange. 

EYDAP has the exclusive right to provide water supply and distribution services as well as sewerage services in the Attica region until 2040, on the basis of the Contract with the Greek State, which follows Law 4812/2021.  In this Contract, the terms for the renewal of the exclusive right to provide water supply and wastewater services of EYDAP are defined, as well as the terms for the signing of a contract for the operation and maintenance services of the External Water Supply System, for a period of three (3) years.

By article 68 of Law 4313/2014, article 8 of Law 2744/1999 was amended and the area of activity of EYDAP was extended to all the Municipalities of the Region of Attica, as defined in subparagraph i' of paragraph 3 of article 3 of Law 3852/2010, except for the Municipalities of Aegina, Troizinia, Kythira, Agistri, Spetses, Hydra and Poros of the Regional Unit of the Islands of the Region of Attica.

EYDAP's area of competence is the major area of Attica. However, EYDAP has the capacity to provide the full range of its services outside its area of competence through subsidiaries and through the conclusion of Programme Deals with local authorities.

Download our app
Google Play app link Apple store app link
Follow us