Carroll County Power Outage History
2014–2025 · New Hampshire
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Dec 16, 2022 | 50 hrs | 16,569 (61%) | Winter Storm |
| Nov 27, 2018 | 47 hrs | 14,308 (52%) | Heavy Snow |
| Aug 4, 2020 | 71 hrs | 13,723 (50%) | Tropical Storm Isaias |
| Mar 7, 2025 | 31 hrs | 13,683 (50%) | Unnamed event |
| Oct 30, 2017 | 108 hrs | 13,028 (48%) | Tropical Storm Philippe |
Over the 12 years from 2014 to 2025, Carroll County recorded 1,151 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Carroll County started December 16, 2022 (Winter Storm), lasting 50 hours and leaving up to 16,569 customers without power (61% of the county) at its peak.
July has historically been the worst month for outages in Carroll County, with 120 events recorded during that month across the dataset.
Based on this history, Carroll County earns a Reliability Grade of F, placing it in the 11th 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 Carroll County.
| County | Grade | National percentile |
|---|---|---|
| Belknap County | F | 9th |
| Sullivan County | F | 16th |
| Cheshire County | F | 18th |
| Grafton County | D | 26th |
| Rockingham County | D | 27th |
FAQ
How often does power go out in Carroll County?
Between 2014 and 2025, Carroll County recorded 1,151 outage events, averaging 3.1 hours each.
What is Carroll County's reliability grade?
Carroll County has a Reliability Grade of F, in the 11th national percentile.
What was the worst power outage in Carroll County?
The worst outage on record started December 16, 2022 (Winter Storm), lasting 50 hours and affecting up to 16,569 customers.