County annual report · FIPS 33013
2022 Merrimack County, NH Power Outage Report
In 2022, customers in Merrimack County, NH went without power for an average of 6.6 hours, a total of 770K customer-hours (New Hampshire average 8.6 hours). That ranks 6th worst of 10 New Hampshire counties and 1100th of 2,976 nationally.
Compared with NH, the US and 2021
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Merrimack County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 23, 2022 03:45 | December 27, 2022 20:00 | 4d 16h | 28,015 | 525K |
| 2 | July 12, 2022 20:45 | July 13, 2022 19:30 | 22h 45m | 5,339 | 15K |
| 3 | March 18, 2022 14:30 | March 18, 2022 15:15 | 45m | 5,219 | 1,310 |
| 4 | November 30, 2022 20:45 | December 1, 2022 23:00 | 1d 2h | 3,922 | 17K |
| 5 | July 24, 2022 17:00 | July 25, 2022 10:15 | 17h 15m | 3,042 | 2,949 |
| 6 | December 16, 2022 17:15 | December 19, 2022 21:45 | 3d 4h | 2,828 | 41K |
| 7 | July 21, 2022 12:00 | July 22, 2022 23:15 | 1d 11h | 2,655 | 14K |
| 8 | November 26, 2022 05:45 | November 26, 2022 21:00 | 15h 15m | 2,568 | 13K |
| 9 | March 12, 2022 19:45 | March 13, 2022 07:00 | 11h 15m | 2,487 | 11K |
| 10 | August 26, 2022 18:45 | August 27, 2022 07:45 | 13h | 2,433 | 3,570 |
Outage episodes by size in 2022: 130 reached 100+ customers, 25 reached 1,000+ customers, 1 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Merrimack County reported on EIA Form 861 for 2022, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Public Service Co of NH | 2022 | 9.2 hrs | 1.44 | 79 min | 0.68 |
| Unitil Energy Systems | 2022 | 4.6 hrs | 1.40 | 71 min | 0.88 |
| New Hampshire Elec Coop Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 99% of New Hampshire's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 115,899 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Merrimack County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Merrimack County, NH annual power outage report, 2022, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2022/new-hampshire/merrimack-county