Data leak at Eau Cœur d’Essonne: bank details preserved

A subscriber file was stolen, but financial information remains secure. The utility company urges vigilance against potential fraud.

Generic image of computer servers representing a data leak.
AI

Generic image of computer servers representing a data leak.

A digital file containing subscriber data from Eau Cœur d’Essonne was stolen, but bank details were not disclosed, according to the National Information Security Agency.

A digital file containing subscriber data from Eau Cœur d’Essonne, including names, addresses, contract and meter references, has been stolen. According to information provided by the National Information Security Agency, bank details such as IBAN and card numbers were apparently not disclosed.
Water quality and service are not affected by this incident. The utility company reminds customers that it will never ask for bank details, a secret code, or direct payment via phone, SMS, or email.
Although bank details are secure, the disclosure of your contact information and contract numbers could be exploited by malicious individuals for fraudulent activities, such as phishing or fake solicitations.
If you receive a suspicious message or call, it is advised not to transmit any bank details, not to click on any dubious links, and in case of doubt, to hang up and contact the utility company directly.
For any additional information or to report suspicious behavior, the Régie's teams are available from this Monday, October 12th at 8:30 AM by phone at the free green number 0 800 500 191 or by email at contact@eaucoeurdessonne.fr.
Based on information from the official source: Mairie d'Ollainville (12/10/2026)