Strafford CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
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 hr | 20,525 (18%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Strafford County, New Hampshire that day.
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).
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 |
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 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.