ATHENS WATER SUPPLY & SEWERAGE COMPANY-EYDAP S.A.

ERROR CORRECTION

We inform the Shareholders of Athens Water Supply and Sewerage Company (EYDAP S.A.), that in the invitation of the Special Meeting of the Minority Shareholders and in the invitation of the 31^st Ordinary General Meeting of 2013, which will take place on June 28, 2013, Friday at 10:00 a.m. and 11:00 a.m. respectively, the record date was erroneously listed as June 21^st, 2013, Friday, instead of the correct record date which is June 23^rd, 2013 Sunday.