Connecticut power outages by utility
5 Connecticut utilities report outage minutes to EIA. The state median is 77 minutes a year; the range runs from 22 to 288.
Ranking by outage minutes
Connecticut, SAIDI without major event days, 2024; lower is better; 5 utilities.
| Rank | Connecticut utility | Owner type | Connecticut home accounts | SAIDI min | Interruptions (SAIFI) | SAIDI with storms | Connecticut storm share | Price ¢/kWh |
|---|---|---|---|---|---|---|---|---|
| 1 | Groton Dept of Utilities | Municipal | 12,284 | 22 | 0.19 | 117 | 81% | 18.70 |
| 2 | United Illuminating Co | Investor Owned | 312,291 | 49 | 0.62 | 122 | 60% | 31.06 |
| 3 | Connecticut Light & Power Co | Investor Owned | 1,174,420 | 77 | 0.65 | 159 | 52% | 25.31 |
| 4 | Bozrah Light & Power Company | Municipal | 2,434 | 184 | 0.87 | 278 | 34% | 19.33 |
| 5 | City of Norwich | Municipal | 18,870 | 288 | 1.45 | 288 | 0% | 22.78 |
Connecticut outage minutes by owner type
In Connecticut, 98% of 1,552,746 home accounts sit with the 5 qualifying utilities out of 6 in the file. Connecticut customer-weighted SAIDI is 74 minutes against a median of 77, and 2 of 5 Connecticut utilities exceed the U.S. median of 99. Counting major event days adds a median 52% to SAIDI.
| Connecticut owner type | Connecticut utilities | Connecticut home accounts | Connecticut median SAIDI | Connecticut weighted SAIDI | Connecticut median SAIFI | Connecticut storm share | Connecticut median price ¢/kWh |
|---|---|---|---|---|---|---|---|
| Investor Owned | 2 | 1,486,711 | 63 | 71 | 0.63 | 56% | 28.19 |
| Municipal | 3 | 33,588 | 184 | 183 | 0.87 | 34% | 19.33 |
By owner type, Investor Owned utilities have the lowest median SAIDI in Connecticut (63 minutes, 2 of 5) and Municipal the highest (184 minutes, 3 of 5).
Connecticut utilities that stand out
| Why it stands out | Connecticut utility | Connecticut owner type | Connecticut accounts | Connecticut SAIDI min | Connecticut SAIDI rank | Connecticut SAIFI | Connecticut SAIDI with storms | Connecticut price ¢/kWh | Connecticut price rank |
|---|---|---|---|---|---|---|---|---|---|
| the most reliable | Groton Dept of Utilities | Municipal | 12,284 | 22 | 1 of 5 | 0.19 | 117 | 18.70 | 1 of 5 |
| the least reliable | City of Norwich | Municipal | 18,870 | 288 | 5 of 5 | 1.45 | 288 | 22.78 | 3 of 5 |
| the largest | Connecticut Light & Power Co | Investor Owned | 1,174,420 | 77 | 3 of 5 | 0.65 | 159 | 25.31 | 4 of 5 |
| the most improved | Bozrah Light & Power Company | Municipal | 2,434 | 184 | 4 of 5 | 0.87 | 278 | 19.33 | 2 of 5 |
| the priciest | United Illuminating Co | Investor Owned | 312,291 | 49 | 2 of 5 | 0.62 | 122 | 31.06 | 5 of 5 |
Does a higher price buy fewer outages?
Each dot is one of 5 Connecticut utilities.
Connecticut, 2024: 5 rows
| Home price, cents per kWh | SAIDI, minutes a year | |
|---|---|---|
| Groton Dept of Utilities | 18.70 | 22 |
| United Illuminating Co | 31.06 | 49 |
| Connecticut Light & Power Co | 25.31 | 77 |
| Bozrah Light & Power Company | 19.33 | 184 |
| City of Norwich | 22.78 | 288 |
5 rows from EIA-861 survey.
CSVConnecticut utilities, change in their own SAIDI
First to last year each utility reported, best change first.
| Rank | Connecticut utility | Connecticut years | Connecticut SAIDI first | Connecticut SAIDI last | Connecticut change |
|---|---|---|---|---|---|
| 1 | Bozrah Light & Power Company | 2015 to 2025 | 291 | 79 | -73% |
| 2 | Connecticut Light & Power Co | 2015 to 2024 | 79 | 77 | -2% |
| 3 | Groton Dept of Utilities | 2015 to 2025 | 58 | 71 | +22% |
| 4 | City of Norwich | 2015 to 2025 | 27 | 169 | +522% |
Analyst note
The reporters cover 98% of Connecticut home accounts, rank 2 of 40. Of 5 Connecticut utilities with 1,000+ home accounts that report SAIDI, Groton Dept of Utilities is lowest at 22 minutes a year and City of Norwich highest at 288, a 12.8 to 1 spread. The state median is 77 minutes, -23% against the U.S. median reporter. Over each utility's own record, Bozrah Light & Power Company improved most (291 to 79 minutes, -73%, 2015 to 2025) and City of Norwich changed the other way (27 to 169, +522%); 2 of 4 fell. Storms weigh most at Groton Dept of Utilities: 81% of its all-event SAIDI (117 minutes) comes from major event days, against 22 without them. The largest of them, Connecticut Light & Power Co with 1,174,420 home accounts, ranks 3 of 5 on SAIDI at 77 minutes.
Questions on Connecticut outages
How much of Connecticut does this ranking cover?
98% of home accounts: 5 utilities of 6.
Which Connecticut utility has the fewest outage minutes?
Groton Dept of Utilities: 22 minutes a year, SAIDI without major events, 2024.
Which Connecticut utility has the most?
City of Norwich: 288 minutes a year in 2024.
What is the typical SAIDI in Connecticut?
The median of 5 reporting utilities is 77 minutes, -23% on the U.S. median reporter.
Do cheaper Connecticut utilities have more outages?
Too few utilities for a meaningful correlation.
How much of Connecticut outage time comes from storms?
At Groton Dept of Utilities 81% of all-event SAIDI is major event days.
How reliable is the largest Connecticut utility?
Connecticut Light & Power Co serves 1,174,420 home accounts and reports 77 minutes, rank 3 of 5; weighted by customers the state figure is 74.
Do Connecticut co-ops and investor-owned utilities differ?
2 owner types report in Connecticut: Municipal 3 utilities with 33,588 home accounts, Investor Owned 2 utilities with 1,486,711 home accounts.
What share of Connecticut home accounts do these utilities serve?
98% of 1,552,746 accounts, 5 of 6 utilities; 2 are above the U.S. median of 99 minutes.
More on Connecticut
- Connecticut state hubprices, map, utilities