Hartford County Power Outage History
2014–2025 · Connecticut
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 4, 2020 | 174 hrs | 179,370 (31%) | Tropical Storm Isaias |
| Feb 22, 2016 | 1 hrs | 30,026 (5%) | Unnamed event |
| May 22, 2022 | 1 hrs | 27,782 (5%) | Unnamed event |
| May 22, 2022 | 3 hrs | 27,180 (5%) | Unnamed event |
| Oct 30, 2017 | 50 hrs | 25,830 (4%) | Tropical Storm Phillipe |
Over the 12 years from 2014 to 2025, Hartford County recorded 2,723 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Hartford County started August 4, 2020 (Tropical Storm Isaias), lasting 174 hours and leaving up to 179,370 customers without power (31% of the county) at its peak.
July has historically been the worst month for outages in Hartford County, with 358 events recorded during that month across the dataset.
Based on this history, Hartford County earns a Reliability Grade of C, placing it in the 58th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Connecticut
Counties with the closest reliability grade and national percentile to Hartford County.
| County | Grade | National percentile |
|---|---|---|
| New Haven County | C | 44th |
| Tolland County | D | 26th |
| Middlesex County | D | 21st |
| Fairfield County | F | 19th |
| New London County | F | 19th |
FAQ
How often does power go out in Hartford County?
Between 2014 and 2025, Hartford County recorded 2,723 outage events, averaging 2.0 hours each.
What is Hartford County's reliability grade?
Hartford County has a Reliability Grade of C, in the 58th national percentile.
What was the worst power outage in Hartford County?
The worst outage on record started August 4, 2020 (Tropical Storm Isaias), lasting 174 hours and affecting up to 179,370 customers.