Hampden County Power Outage History
2014–2025 · Massachusetts
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 4, 2020 | 98 hrs | 56,663 (11%) | Tropical Storm Isaias |
| Oct 7, 2020 | 51 hrs | 30,367 (6%) | Thunderstorm Wind |
| Jul 12, 2022 | 7 hrs | 23,142 (5%) | Thunderstorm Wind |
| Oct 30, 2017 | 45 hrs | 20,329 (4%) | Tropical Storm Phillipe |
| Mar 4, 2023 | 5 hrs | 20,292 (4%) | Heavy Snow |
Over the 12 years from 2014 to 2025, Hampden County recorded 1,516 distinct power outage events, averaging 3.2 hours per event.
The single worst outage on record in Hampden County started August 4, 2020 (Tropical Storm Isaias), lasting 98 hours and leaving up to 56,663 customers without power (11% of the county) at its peak.
July has historically been the worst month for outages in Hampden County, with 193 events recorded during that month across the dataset.
Based on this history, Hampden County earns a Reliability Grade of B, placing it in the 79th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Hampden County's outage profile
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Outage-prep kit
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Similar counties in Massachusetts
Counties with the closest reliability grade and national percentile to Hampden County.
| County | Grade | National percentile |
|---|---|---|
| Bristol County | B | 78th |
| Norfolk County | B | 73rd |
| Franklin County | A | 85th |
| Berkshire County | A | 89th |
| Dukes County | B | 67th |
FAQ
How often does power go out in Hampden County?
Between 2014 and 2025, Hampden County recorded 1,516 outage events, averaging 3.2 hours each.
What is Hampden County's reliability grade?
Hampden County has a Reliability Grade of B, in the 79th national percentile.
What was the worst power outage in Hampden County?
The worst outage on record started August 4, 2020 (Tropical Storm Isaias), lasting 98 hours and affecting up to 56,663 customers.