---
title: "Data breach at Aqualter"
description: "An individual using the alias ChimeraZ claimed, on the night of September 10, 2026, to have published a database attributed to Aqualter, a French water management company. The file reportedly contains 320,936 rows split between 187,073 phone numbers and 86,156 email addresses, presented as covering "
canonical: https://inyourgeek.com/en/fuites-de-donnees/2026-09-10-aqualter
type: fuite-de-donnees
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-09-10
dateModified: 2026-09-10
---
# Aqualter

Data breach — Moderate

An individual using the alias ChimeraZ claimed, on the night of September 10, 2026, to have published a database attributed to Aqualter, a French water management company. The file reportedly contains 320,936 rows split between 187,073 phone numbers and 86,156 email addresses, presented as covering roughly 273,000 customers, though this total may include overlap between the two lists. No passwords, banking data, or identity documents are claimed. The origin of the data is unspecified and Aqualter has not confirmed the incident so far.

The exposed contact details could be used for phishing or fraudulent SMS campaigns impersonating Aqualter or a water-management service.

| Fact | Value |
| --- | --- |
| Disclosed on | September 10, 2026 |
| Accounts affected | 273,229 |
| Sector | Industry |
| Country | France |
| Cause | Undisclosed |
| Severity | Moderate |
| Status | Reported |

## Exposed data

- Email address
- Phone number

## What you can do

- Expect phishing attempts quoting your name and this company. A message that knows your details is not legitimate for that reason.
- You can ask the organisation exactly what was exposed about you (right of access), and complain to the DPA if no answer comes within a month.

## Sources

- [Aqualter](https://frenchbreaches.com/alertes/aqualter-mtw3s7ufzaqj8v0kb3b) — FrenchBreaches
- [187 074 contacts d'Aqualter : fuite revendiquée](https://fuitesinfos.fr/article/2026-09-10-aqualter) — Fuites Infos
- [Aqualter : 187 000 numéros de téléphone exposés après une cyberattaque](https://www.cyberattaque.org/aqualter-187-000-numeros-de-telephone-exposes-apres-une-cyberattaque/) — cyberattaque.org

_Entry built from the cited sources after a corroboration check, then reviewed before publication._

---

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