Power outages in Connecticut
In 2025, Connecticut customers experienced 3.5 hours (211 minutes) of total power outages. This is better than the US median of 4.3 hours across 50 states.
Trend
Connecticut's outage times have remained relatively stable at 2-3 hours per year since 2021, following a spike in 2020 when customers experienced 44.0 hours of outages.
Utilities in 2025
Town of Wallingford had the best reliability in 2025 with 0.9 hours (53 minutes) of outages, while Connecticut Light & Power Co had the longest at 3.6 hours (217 minutes).
| Utility | Customers | Hours / yr | Interruptions |
|---|---|---|---|
| Connecticut Light & Power Co | 1,345,292 | 3.6 | 1.0 |
| City of Norwich - (CT) | 20,996 | 2.8 | 1.5 |
| United Illuminating Co | 347,254 | 1.2 | 0.7 |
| Groton Dept of Utilities - (CT) | 16,395 | 1.2 | 0.4 |
| Town of Wallingford - (CT) | 25,123 | 0.9 | 0.4 |
What this means for backup power
For everyday outages, plan for 3.5 hours (the average length of one interruption in Connecticut). To ride out a year like 2020, size your backup system for 44.0 hours (all of that year's outage hours).
FAQ
How does Connecticut's power reliability compare nationally?
Connecticut's 3.5 hours of outages in 2025 is better than the US median of 4.3 hours across all 50 states.
How many power outages should I expect each year?
Connecticut customers experience about one interruption per year (0.994 in 2025), with each outage lasting an average of 3.5 hours.
What backup power capacity should I plan for?
Use our calculator to enter 3.5 hours for typical outages. For protection against an extreme year like 2020, consider sizing for 44.0 hours of total outage time.
Utility pages
Source: U.S. EIA Form 861 Reliability file. Data snapshot 2026-11-05.