Hampshire County Power Outage History
2014–2025 · Massachusetts
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 15, 2017 | 4 hrs | 29,373 (11%) | Unnamed event |
| Oct 7, 2020 | 54 hrs | 16,358 (6%) | Thunderstorm Wind |
| Aug 12, 2021 | 10 hrs | 13,543 (5%) | Thunderstorm Wind |
| Aug 4, 2020 | 82 hrs | 13,422 (5%) | Tropical Storm Isaias |
| Jul 12, 2022 | 5 hrs | 12,397 (5%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Hampshire County recorded 830 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Hampshire County started November 15, 2017, lasting 4 hours and leaving up to 29,373 customers without power (11% of the county) at its peak.
July has historically been the worst month for outages in Hampshire County, with 109 events recorded during that month across the dataset.
Based on this history, Hampshire County earns a Reliability Grade of A, placing it in the 91st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Hampshire County's outage profile
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Similar counties in Massachusetts
Counties with the closest reliability grade and national percentile to Hampshire County.
| County | Grade | National percentile |
|---|---|---|
| Berkshire County | A | 89th |
| Suffolk County | A | 96th |
| Franklin County | A | 85th |
| Hampden County | B | 79th |
| Bristol County | B | 78th |
FAQ
How often does power go out in Hampshire County?
Between 2014 and 2025, Hampshire County recorded 830 outage events, averaging 2.3 hours each.
What is Hampshire County's reliability grade?
Hampshire County has a Reliability Grade of A, in the 91st national percentile.
What was the worst power outage in Hampshire County?
The worst outage on record started November 15, 2017, lasting 4 hours and affecting up to 29,373 customers.