2025 New Hampshire Power Outage Report
In 2025, the average New Hampshire customer went without power for about 3.8 hours, the 33rd worst of 51 states (US average 5.3 hours). Figures from DOE/ORNL EAGLE-I, including major storm days.
Avg hrs / customer
3.8
vs prior year
▼ 74%
vs 2024
Customer-hours out
2.8M
Peak customers out
45,690
across the state at once
EAGLE-I coverage
n/a
of NH customers
Counties reporting
10
New Hampshire year over year
All 10 New Hampshire counties, 2025
Ranked by average hours without power per customer. Each county links to its annual report.
| # | County | Hrs / customer | Customer-hours | Customers | Peak out | Events |
|---|---|---|---|---|---|---|
| 1 | Carroll County | 14.5 | 376K | 26,009 | 13,683 | 690 |
| 2 | Belknap County | 10.5 | 342K | 32,434 | 6,091 | 565 |
| 3 | Sullivan County | 10.2 | 205K | 20,079 | 5,909 | 509 |
| 4 | Grafton County | 6.0 | 298K | 49,895 | 6,234 | 715 |
| 5 | Coos County | 3.5 | 85K | 24,038 | 3,849 | 408 |
| 6 | Rockingham County | 3.1 | 480K | 154,048 | 18,430 | 1,063 |
| 7 | Cheshire County | 3.1 | 111K | 36,014 | 10,451 | 636 |
| 8 | Merrimack County | 2.6 | 298K | 115,899 | 8,480 | 900 |
| 9 | Hillsborough County | 2.3 | 454K | 196,402 | 18,617 | 1,082 |
| 10 | Strafford County | 1.6 | 144K | 89,738 | 5,195 | 714 |
Biggest New Hampshire outages of 2025
Up to 25 county outage episodes with the most customers out at once.
| # | County | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|---|
| 1 | Hillsborough County, NH | October 7, 2025 14:00 | October 7, 2025 20:15 | 6h 15m | 18,617 | 4,717 |
| 2 | Rockingham County, NH | May 18, 2025 01:45 | May 18, 2025 05:15 | 3h 30m | 18,430 | 38K |
| 3 | Rockingham County, NH | March 7, 2025 08:45 | March 9, 2025 06:45 | 1d 22h | 14,298 | 89K |
| 4 | Carroll County, NH | March 7, 2025 09:15 | March 9, 2025 21:30 | 2d 12h | 13,683 | 120K |
| 5 | Cheshire County, NH | March 6, 2025 12:30 | March 6, 2025 16:30 | 4h | 10,451 | 2,617 |
| 6 | Carroll County, NH | May 2, 2025 13:30 | May 2, 2025 19:30 | 6h | 9,633 | 25K |
| 7 | Hillsborough County, NH | March 7, 2025 08:30 | March 9, 2025 07:45 | 1d 23h | 8,697 | 76K |
| 8 | Merrimack County, NH | March 7, 2025 08:30 | March 9, 2025 00:00 | 1d 15h | 8,480 | 31K |
| 9 | Rockingham County, NH | September 30, 2025 16:15 | September 30, 2025 18:45 | 2h 30m | 7,873 | 3,939 |
| 10 | Carroll County, NH | December 29, 2025 05:30 | December 31, 2025 04:30 | 1d 23h | 7,619 | 77K |
| 11 | Rockingham County, NH | February 17, 2025 12:45 | February 18, 2025 05:45 | 17h | 6,639 | 13K |
| 12 | Rockingham County, NH | July 18, 2025 00:45 | July 18, 2025 16:00 | 15h 15m | 6,303 | 18K |
| 13 | Grafton County, NH | June 19, 2025 20:00 | June 21, 2025 04:30 | 1d 8h | 6,234 | 16K |
| 14 | Rockingham County, NH | July 21, 2025 05:00 | July 21, 2025 05:30 | 30m | 6,184 | 1,700 |
| 15 | Grafton County, NH | April 26, 2025 17:00 | April 30, 2025 18:15 | 4d 1h | 6,094 | 22K |
| 16 | Belknap County, NH | February 20, 2025 15:45 | March 15, 2025 13:45 | 22d 22h | 6,091 | 74K |
| 17 | Carroll County, NH | October 31, 2025 04:45 | November 1, 2025 22:30 | 1d 17h | 5,935 | 29K |
| 18 | Sullivan County, NH | December 29, 2025 10:15 | December 31, 2025 07:30 | 1d 21h | 5,909 | 47K |
| 19 | Grafton County, NH | January 19, 2025 01:15 | January 19, 2025 06:15 | 5h | 5,836 | 4,406 |
| 20 | Merrimack County, NH | June 19, 2025 20:45 | June 21, 2025 09:15 | 1d 12h | 5,686 | 27K |
| 21 | Belknap County, NH | September 29, 2025 15:00 | September 29, 2025 15:15 | 15m | 5,664 | 1,416 |
| 22 | Merrimack County, NH | June 24, 2025 21:00 | June 25, 2025 06:15 | 9h 15m | 5,624 | 13K |
| 23 | Belknap County, NH | July 16, 2025 13:15 | July 16, 2025 13:45 | 30m | 5,521 | 2,754 |
| 24 | Hillsborough County, NH | October 30, 2025 17:00 | November 2, 2025 02:45 | 2d 9h | 5,310 | 53K |
| 25 | Belknap County, NH | December 29, 2025 08:15 | January 1, 2026 00:00 | 2d 15h | 5,234 | 39K |
EAGLE-I tracked about n/a of New Hampshire's electricity customers in 2025; outages at utilities it does not see are not counted. Hours per customer divide outage customer-minutes by modeled county customers.
Part of the 2025 US Power Outage Report.
Data from DOE EAGLE-I, every source we read.