Norfolk 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 |
|---|---|---|---|
| Oct 27, 2021 | 21 hrs | 126,740 (20%) | High Wind |
| Oct 27, 2021 | 18 hrs | 68,520 (11%) | High Wind |
| Mar 2, 2018 | 87 hrs | 68,310 (11%) | High Wind |
| Dec 18, 2023 | 68 hrs | 55,159 (9%) | High Wind |
| Oct 7, 2020 | 54 hrs | 43,408 (7%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Norfolk County recorded 2,598 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Norfolk County started October 27, 2021 (High Wind), lasting 21 hours and leaving up to 126,740 customers without power (20% of the county) at its peak.
July has historically been the worst month for outages in Norfolk County, with 324 events recorded during that month across the dataset.
Based on this history, Norfolk County earns a Reliability Grade of B, placing it in the 73rd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Norfolk 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 Norfolk County.
| County | Grade | National percentile |
|---|---|---|
| Bristol County | B | 78th |
| Hampden County | B | 79th |
| Dukes County | B | 67th |
| Middlesex County | B | 64th |
| Franklin County | A | 85th |
FAQ
How often does power go out in Norfolk County?
Between 2014 and 2025, Norfolk County recorded 2,598 outage events, averaging 2.4 hours each.
What is Norfolk County's reliability grade?
Norfolk County has a Reliability Grade of B, in the 73rd national percentile.
What was the worst power outage in Norfolk County?
The worst outage on record started October 27, 2021 (High Wind), lasting 21 hours and affecting up to 126,740 customers.