London Hydro, a Canadian electricity utility serving 170,000 customers, disclosed a data breach on June 20, 2026 affecting customer names, postal addresses, email addresses, phone numbers, billing account numbers, and pricing plan details. Financial records, dates of birth, and government IDs were not compromised. The breach is notable for its critical infrastructure context and the social engineering risk it creates against a large residential and commercial customer base using billing account numbers as lure content.