2021 New Hampshire Power Outage Report
In 2021, the average New Hampshire customer went without power for about 3.4 hours, the 30th worst of 51 states (US average 8.4 hours). Figures from DOE/ORNL EAGLE-I, including major storm days.
Avg hrs / customer
3.4
vs prior year
▼ 51%
vs 2020
Customer-hours out
2.6M
Peak customers out
40,132
across the state at once
EAGLE-I coverage
99%
of NH customers
Counties reporting
10
New Hampshire year over year
All 10 New Hampshire counties, 2021
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 | 11.0 | 286K | 26,009 | 6,968 | 788 |
| 2 | Belknap County | 8.2 | 268K | 32,434 | 6,170 | 621 |
| 3 | Sullivan County | 5.9 | 119K | 20,079 | 2,795 | 539 |
| 4 | Cheshire County | 5.3 | 192K | 36,014 | 5,875 | 632 |
| 5 | Coos County | 5.0 | 119K | 24,038 | 9,692 | 382 |
| 6 | Grafton County | 3.5 | 175K | 49,895 | 7,744 | 782 |
| 7 | Rockingham County | 3.4 | 518K | 154,048 | 12,591 | 915 |
| 8 | Strafford County | 2.7 | 239K | 89,738 | 7,769 | 698 |
| 9 | Hillsborough County | 2.1 | 418K | 196,402 | 12,003 | 982 |
| 10 | Merrimack County | 1.9 | 224K | 115,899 | 12,533 | 743 |
Biggest New Hampshire outages of 2021
Up to 25 county outage episodes with the most customers out at once.
| # | County | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|---|
| 1 | Rockingham County, NH | March 29, 2021 11:45 | March 31, 2021 02:00 | 1d 14h | 12,591 | 109K |
| 2 | Merrimack County, NH | March 29, 2021 08:00 | March 31, 2021 05:30 | 1d 21h | 12,533 | 48K |
| 3 | Hillsborough County, NH | April 8, 2021 11:30 | April 8, 2021 17:15 | 5h 45m | 12,003 | 3,981 |
| 4 | Coos County, NH | June 4, 2021 20:30 | June 4, 2021 21:30 | 1h | 9,692 | 4,846 |
| 5 | Hillsborough County, NH | March 1, 2021 23:30 | March 4, 2021 06:30 | 2d 7h | 9,065 | 105K |
| 6 | Rockingham County, NH | September 21, 2021 23:45 | September 23, 2021 09:30 | 1d 9h | 8,916 | 19K |
| 7 | Strafford County, NH | June 30, 2021 20:15 | July 1, 2021 23:00 | 1d 2h | 7,769 | 18K |
| 8 | Grafton County, NH | August 15, 2021 15:15 | August 15, 2021 19:15 | 4h | 7,744 | 17K |
| 9 | Rockingham County, NH | March 2, 2021 03:15 | March 4, 2021 18:00 | 2d 14h | 7,711 | 160K |
| 10 | Coos County, NH | March 2, 2021 03:30 | March 3, 2021 20:15 | 1d 16h | 7,004 | 37K |
| 11 | Hillsborough County, NH | March 29, 2021 02:30 | March 31, 2021 03:00 | 2d | 6,990 | 44K |
| 12 | Carroll County, NH | September 13, 2021 01:00 | September 13, 2021 03:00 | 2h | 6,968 | 5,537 |
| 13 | Carroll County, NH | March 2, 2021 03:45 | March 4, 2021 23:00 | 2d 19h | 6,618 | 93K |
| 14 | Rockingham County, NH | October 26, 2021 18:45 | October 28, 2021 02:30 | 1d 7h | 6,546 | 23K |
| 15 | Belknap County, NH | May 23, 2021 15:15 | May 24, 2021 00:45 | 9h 30m | 6,170 | 7,139 |
| 16 | Merrimack County, NH | March 2, 2021 00:45 | March 4, 2021 13:15 | 2d 12h | 5,988 | 44K |
| 17 | Cheshire County, NH | June 30, 2021 20:30 | July 2, 2021 05:30 | 1d 9h | 5,875 | 35K |
| 18 | Strafford County, NH | February 16, 2021 13:00 | February 17, 2021 07:00 | 18h | 5,792 | 16K |
| 19 | Belknap County, NH | August 21, 2021 05:15 | August 21, 2021 08:30 | 3h 15m | 5,702 | 11K |
| 20 | Belknap County, NH | June 30, 2021 20:00 | July 2, 2021 01:45 | 1d 5h | 5,542 | 29K |
| 21 | Cheshire County, NH | October 22, 2021 20:30 | October 22, 2021 22:00 | 1h 30m | 5,269 | 2,632 |
| 22 | Merrimack County, NH | April 23, 2021 15:00 | April 23, 2021 18:45 | 3h 45m | 5,221 | 2,815 |
| 23 | Belknap County, NH | March 2, 2021 03:00 | April 10, 2021 05:45 | 39d 2h | 5,136 | 129K |
| 24 | Strafford County, NH | March 29, 2021 13:00 | March 31, 2021 03:30 | 1d 14h | 4,712 | 36K |
| 25 | Grafton County, NH | June 30, 2021 18:30 | July 1, 2021 18:30 | 1d | 4,630 | 9,127 |
EAGLE-I tracked about 99% of New Hampshire's electricity customers in 2021; outages at utilities it does not see are not counted. Hours per customer divide outage customer-minutes by modeled county customers.
Part of the 2021 US Power Outage Report.
Data from DOE EAGLE-I, every source we read.