Hartford CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
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 hr | 30,026 (5%) | Unnamed event |
| May 22, 2022 | <1 hr | 27,782 (5%) | Thunderstorm Wind |
| May 22, 2022 | 3 hrs | 27,180 (5%) | Thunderstorm Wind |
| Oct 30, 2017 | 50 hrs | 25,830 (4%) | Tropical Storm Phillipe |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Hartford County, Connecticut that day.
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).
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 |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
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.