Overview
219 people (174 households). Name, address, exemption status, customer number.
Timeline
- Occurred
- Discovered
- Disclosed
Organization response
Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.
What you can do
Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.
Sources
- 水道料金等の減免に係る保存文書の所在不明について横浜市水道局 · 2026-11-09