State · EIA Form 861 · CT
Connecticut
According to the U.S. Energy Information Administration's EIA Form 861, SAIDI and SAIFI for Connecticut utilities come from the federal annual survey. 6 utilities report reliability metrics; figures are customer-weighted state averages, not a guarantee for any single address.
Signature read: mid-cohort SAIDI between the 156 and 365 minute tercile cuts (51 states with averages).
EIA Form 861 · Continuity Brief
Connecticut
EIA Form 861 Continuity Brief · August 2026 · IEEE 1366 SAIDI/SAIFI minutes, not a storm forecast.
Connecticut sits mid-pack on SAIDI at 168.7 minutes across 6 EIA Form 861 utilities, spanning United Illuminating Co lowest at 56.0 to City of Norwich - (CT) highest at 456.9.
Named SAIDI peers (in-state best + nearest-state averages)
State SAIDI neighbourhood (minutes / customer-year)
- Connecticut 168.7
- New Mexico 167.3
- Florida 160.1
- Washington 158.2
- Wyoming 156.2
- Wisconsin 184.2
Lower is fewer interruption minutes. Neighbours are nearest other-state averages in this corpus.
Connecticut vs all states by EIA Form 861 utility headcount
Where this state's reporting utility count sits among every state in the Form 861 file (coverage density, not reliability quality)
6 Top 76% more reporting utilities than 24% of 51 states
States, banded by electric utilities reporting on EIA Form 861
Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EIA Form 861 · 2026-08-30
Utilities Ranked by Reliability
All 6 electric utilities in Connecticut with reliability data, sorted by 2023 SAIDI (fewest outage minutes first).
Lowest-SAIDI utilities in Connecticut
Fewest outage minutes · live table sort
Top 6 Connecticut utilities by fewest outage minutes. Lower SAIDI is better - not a quality score beyond interruption duration.
Lowest-SAIDI utilities in Connecticut
| # | Utility | Type | SAIDI 2023 | SAIFI 2023 | Customers |
|---|---|---|---|---|---|
| 1 | United Illuminating Co | IOU | 56.0 | 0.75 | 281,971 |
| 2 | Town of Wallingford - (CT) | Municipal | 110.3 | 0.46 | 25,048 |
| 3 | Groton Dept of Utilities - (CT) | Municipal | 120.1 | 1.04 | 13,850 |
| 4 | Connecticut Light & Power Co | IOU | 189.8 | 0.88 | 1,012,596 |
| 5 | Bozrah Light & Power Company | Municipal | 278.3 | 1.63 | 2,819 |
| 6 | City of Norwich - (CT) | Municipal | 456.9 | 2.40 | 20,808 |
Nationwide states with similar utility inventory or customer scale
Two cross-state peer sets for Connecticut. Nearest-SAIDI neighbors stay in Read-with below; these neighborhoods compare EIA Form 861 headcount and summed customer accounts.
Similar utility headcount
Nearest states by reporting utility count (6 here).
Similar customer scale
Nearest states by summed customer accounts (1.4M here), excluding the headcount peer set.
Read with this Connecticut roster
- Lowest published SAIDI in Connecticut: United Illuminating Co (56.0 min)
- Highest published SAIDI in Connecticut: City of Norwich - (CT) (456.9 min)
- Ownership mix here: Municipal leads (4 of 6 utilities) · national type means
- Nearest avg SAIDI: New Mexico (167.3 min)
- Nearest avg SAIDI: Florida (160.1 min)
- Nearest avg SAIDI: Washington (158.2 min)
- Nearest avg SAIDI: Wyoming (156.2 min)
- Nearest avg SAIDI: Wisconsin (184.2 min)
Source: U.S. Energy Information Administration (EIA) Form 861 Annual Electric Power Industry Report, reliability · 2020-2023 State averages are rebuilt from utility filings in this portal DB; corpus ranks use headcount and customer sums.