Strafford County Power Outage History
2014–2025 · New Hampshire
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 30, 2017 | 111 hrs | 29,633 (26%) | Tropical Storm Philippe |
| Nov 26, 2014 | 51 hrs | 26,902 (24%) | Winter Storm |
| Apr 4, 2024 | 84 hrs | 24,097 (21%) | Winter Storm |
| Jan 23, 2023 | 62 hrs | 20,731 (18%) | Winter Storm |
| May 28, 2023 | 1 hrs | 20,525 (18%) | Unnamed event |
Over the 12 years from 2014 to 2025, Strafford County recorded 779 distinct power outage events, averaging 2.8 hours per event.
The single worst outage on record in Strafford County started October 30, 2017 (Tropical Storm Philippe), lasting 111 hours and leaving up to 29,633 customers without power (26% of the county) at its peak.
March has historically been the worst month for outages in Strafford County, with 85 events recorded during that month across the dataset.
Based on this history, Strafford County earns a Reliability Grade of C, placing it in the 41st percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in New Hampshire
Counties with the closest reliability grade and national percentile to Strafford County.
| County | Grade | National percentile |
|---|---|---|
| Hillsborough County | D | 33rd |
| Merrimack County | D | 33rd |
| Coos County | D | 27th |
| Rockingham County | D | 27th |
| Grafton County | D | 26th |
FAQ
How often does power go out in Strafford County?
Between 2014 and 2025, Strafford County recorded 779 outage events, averaging 2.8 hours each.
What is Strafford County's reliability grade?
Strafford County has a Reliability Grade of C, in the 41st national percentile.
What was the worst power outage in Strafford County?
The worst outage on record started October 30, 2017 (Tropical Storm Philippe), lasting 111 hours and affecting up to 29,633 customers.