The number the headline stats leave out
In 2024, 52% of the average Eversource customer's outage time came during major storm days, the days set aside from the headline reliability statistics.
Utilities report reliability to regulators like Connecticut's PURA and to the federal EIA under an industry convention (IEEE 1366) that sets aside "major event days" so routine performance can be compared across years. That is a reasonable engineering convention, and on those headline numbers, PURA's own annual reporting shows Connecticut's utilities comparing favorably nationally. We say that plainly. But about half of the outage time a household actually experienced came during the set-aside storm days, and that storm tail is what this site exists to measure.
| Utility, year | Avg outage minutes, all days | Excluding major event days | Share in storm days | Filed standard |
|---|---|---|---|---|
| Eversource (CL&P), 2024 | 158.8 | 76.9 | 52% | IEEE |
| United Illuminating, 2024 | 121.8 | 49.2 | 60% | IEEE |
| Eversource (CL&P), 2023 | 189.8 | 75.6 | 60% | IEEE |
| United Illuminating, 2023 | 56 | 43 | 23% | Other Standard |
Source: EIA-861 Reliability file (utility filings). Minutes are SAIDI: the average across all customers (metered accounts) of that utility, not a typical single outage. Rows are comparable only within the same filed standard. Full definitions on the methodology page.
What CheckYourGrid covers
We collect the public records of how Connecticut's grid actually performs, federal outage data, reliability filings, storm records, and turn them into a plain answer for your town. Live today: outage-record pages for all 169 Connecticut towns (county-grain history, labeled as exactly that), the as-filed utility reliability record, and the full open dataset. Every number carries its window, its grain, and its methodology. Town-grain history and risk scores publish as the data accrues, never before.
Outage-risk alerts are coming
We are building storm-driven outage-risk alerts: when conditions put your area at elevated risk of losing power, you hear about it first. Every prediction gets scored publicly, you will always see our hit rate and our false-alarm rate right next to the signup.