When power interruptions were longest in Kenya in 2025/26

May was highest on all three measures

May recorded 4.98 interruptions per customer, 27.33 hours of total interruptions per customer and 5.49 hours per interruption. In June the figures were 4.11, 19.77 and 4.81. The measures describe how often interruptions occurred, their combined duration and the length of each interruption. Source 1

The start of the fiscal year had fewer interruptions

The monthly chart shows July 2025 at 2.82 interruptions per customer, the lowest displayed frequency. July also had the lowest total duration at 7.18 hours. September had the shortest time per interruption at 2.11 hours. The half-year report confirms July’s frequency reading. Source 1 Source 2

The fiscal-year summaries exceeded the regulator’s benchmarks

For 2025/26, EPRA reported 3.91 interruptions per customer per month, compared with a benchmark of 1.10. Its total duration summary was 13.16 hours compared with 1.50, and its duration per interruption was 3.23 hours against 1.36. The annual chart showed 9.42 hours of total interruption per customer for 2024/25. Source 1

Two duration measures use different denominators

The system average interruption duration index uses all customers served, including people who had no interruption. The customer average interruption duration index relates the duration to customer interruptions. The frequency index counts interruptions across the customer base and does not use their length. Source 1

Sources

• Energy and Petroleum Regulatory Authority, 2026 statistics report, figures 2.19 to 2.24
• Energy and Petroleum Regulatory Authority, 2025/26 biannual statistics report, table 2.2