Hampshire CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Hampshire County, Massachusetts that day.
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).
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 |
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 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.