Grafton CountyPower Outage History
What this grade means
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 30, 2017 | 112 hrs | 11,415 (23%) | Tropical Storm Philippe |
| Aug 4, 2020 | 68 hrs | 11,201 (22%) | Tropical Storm Isaias |
| Dec 23, 2022 | 90 hrs | 9,802 (20%) | Winter Storm |
| Dec 16, 2022 | 50 hrs | 9,727 (19%) | Winter Storm |
| Jul 21, 2022 | 21 hrs | 9,431 (19%) | Hail |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Grafton County, New Hampshire that day.
Over the 12 years from 2014 to 2025, Grafton County recorded 897 distinct power outage events, averaging 3.2 hours per event.
The single worst outage on record in Grafton County started October 30, 2017 (Tropical Storm Philippe), lasting 112 hours and leaving up to 11,415 customers without power (23% of the county) at its peak.
June has historically been the worst month for outages in Grafton County, with 89 events recorded during that month across the dataset.
Based on this history, Grafton County earns a Reliability Grade of D, placing it in the 26th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in New Hampshire
Counties with the closest reliability grade and national percentile to Grafton County.
| County | Grade | National percentile |
|---|---|---|
| Rockingham County | D | 27th |
| Coos County | D | 27th |
| Merrimack County | D | 33rd |
| Hillsborough County | D | 33rd |
| Cheshire County | F | 18th |
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 Grafton County?
Between 2014 and 2025, Grafton County recorded 897 outage events, averaging 3.2 hours each.
What is Grafton County's reliability grade?
Grafton County has a Reliability Grade of D, in the 26th national percentile.
What was the worst power outage in Grafton County?
The worst outage on record started October 30, 2017 (Tropical Storm Philippe), lasting 112 hours and affecting up to 11,415 customers.