THESSALONIKI WATER AND SEWAGE COMPANY SA

Announcement

The WATER SUPPLY AND SEWERAGE SYSTEMS COMPANY OF THESSALONIKI S.A. announces that within the framework of the proper and timely informing of investors, in accordance with article 4.1.4.3 of the Athens Stock Exchange Regulations, the Company's financial calendar for the year 2010 is as follows:
Announcement of results 31.12.2009 : Monday the 29th of March 2010
Publication of Results 31.12.2009 : Tuesday 30th of March 2010
Announcement of Results for the first trimester 2010: Friday the 28th of May 2010
Yearly Informing of Analysts regarding the financial results of the year 2009: Friday the 4th of June 2010
Yearly Regular General Stockholders Meeting: Wednesday 30th of June 2010
Dividend Cut: 19th of August 2010
Dividend payees (record date) shall be the stockholders holding stocks at the end of the meeting of Friday the 23rd of August2010.
Initiation of dividend payment through a Bank Institution, to be later announced: Friday the 27th of August 2010
Announcement of Results for the first semester of 2010: Tuesday the 31st of August 2010
Announcement of Results for the first nine months 2010: Tuesday the 30th of November 2010
The Company would like to specify that the results will be published to the press, the company website (www.eyath.gr) and the webpage of the Athens Stock Exchange (www.ase.gr).