Fairfield County Power Outage History
2014–2025 · Connecticut
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 4, 2020 | 204 hrs | 190,956 (61%) | Hurricane Isaias |
| Mar 7, 2018 | 110 hrs | 64,829 (21%) | Winter Weather |
| May 15, 2018 | 31 hrs | 47,402 (15%) | Unnamed event |
| Jun 23, 2015 | 21 hrs | 33,904 (11%) | Unnamed event |
| Jul 3, 2023 | 11 hrs | 29,682 (10%) | Unnamed event |
Over the 12 years from 2014 to 2025, Fairfield County recorded 2,958 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Fairfield County started August 4, 2020 (Hurricane Isaias), lasting 204 hours and leaving up to 190,956 customers without power (61% of the county) at its peak.
July has historically been the worst month for outages in Fairfield County, with 373 events recorded during that month across the dataset.
Based on this history, Fairfield County earns a Reliability Grade of F, placing it in the 19th 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 Fairfield County.
| County | Grade | National percentile |
|---|---|---|
| New London County | F | 19th |
| Litchfield County | F | 18th |
| Middlesex County | D | 21st |
| Windham County | F | 15th |
| Tolland County | D | 26th |
FAQ
How often does power go out in Fairfield County?
Between 2014 and 2025, Fairfield County recorded 2,958 outage events, averaging 2.3 hours each.
What is Fairfield County's reliability grade?
Fairfield County has a Reliability Grade of F, in the 19th national percentile.
What was the worst power outage in Fairfield County?
The worst outage on record started August 4, 2020 (Hurricane Isaias), lasting 204 hours and affecting up to 190,956 customers.