County annual report · FIPS 33013
2024 Merrimack County, NH Power Outage Report
In 2024, customers in Merrimack County, NH went without power for an average of 11.8 hours, a total of 1.4M customer-hours (New Hampshire average 14.2 hours). That ranks 8th worst of 10 New Hampshire counties and 796th of 2,990 nationally.
Compared with NH, the US and 2023
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Merrimack County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 23, 2024 22:15 | March 27, 2024 00:45 | 3d 2h | 30,245 | 594K |
| 2 | April 4, 2024 01:00 | April 9, 2024 00:00 | 4d 23h | 22,459 | 526K |
| 3 | July 9, 2024 20:00 | July 10, 2024 12:15 | 16h 15m | 4,957 | 21K |
| 4 | July 16, 2024 18:30 | July 18, 2024 02:15 | 1d 7h | 4,281 | 10K |
| 5 | November 28, 2024 17:30 | November 30, 2024 01:45 | 1d 8h | 4,280 | 12K |
| 6 | June 12, 2024 23:15 | June 13, 2024 00:00 | 45m | 3,519 | 1,140 |
| 7 | February 29, 2024 02:30 | March 1, 2024 07:30 | 1d 5h | 3,406 | 19K |
| 8 | March 11, 2024 14:30 | March 12, 2024 21:30 | 1d 7h | 3,393 | 20K |
| 9 | April 1, 2024 13:30 | April 1, 2024 19:00 | 5h 30m | 2,997 | 1,511 |
| 10 | January 29, 2024 03:00 | January 30, 2024 03:45 | 1d | 2,995 | 20K |
Outage episodes by size in 2024: 141 reached 100+ customers, 24 reached 1,000+ customers, 2 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 2024, 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 | 2024 | 13.1 hrs | 1.60 | 82 min | 0.74 |
| Unitil Energy Systems | 2024 | 9.9 hrs | 1.73 | 1.6 hrs | 1.00 |
| 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 n/a of New Hampshire's customers in 2024; 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, 2024, 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/2024/new-hampshire/merrimack-county