County annual report · FIPS 33015
2025 Rockingham County, NH Power Outage Report
In 2025, customers in Rockingham County, NH went without power for an average of 3.1 hours, a total of 480K customer-hours (New Hampshire average 3.8 hours). That ranks 6th worst of 10 New Hampshire counties and 2022nd of 3,000 nationally.
Compared with NH, the US and 2024
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Rockingham County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 18, 2025 01:45 | May 18, 2025 05:15 | 3h 30m | 18,430 | 38K |
| 2 | March 7, 2025 08:45 | March 9, 2025 06:45 | 1d 22h | 14,298 | 89K |
| 3 | September 30, 2025 16:15 | September 30, 2025 18:45 | 2h 30m | 7,873 | 3,939 |
| 4 | February 17, 2025 12:45 | February 18, 2025 05:45 | 17h | 6,639 | 13K |
| 5 | July 18, 2025 00:45 | July 18, 2025 16:00 | 15h 15m | 6,303 | 18K |
| 6 | July 21, 2025 05:00 | July 21, 2025 05:30 | 30m | 6,184 | 1,700 |
| 7 | January 2, 2025 13:30 | January 3, 2025 08:15 | 18h 45m | 4,741 | 20K |
| 8 | December 19, 2025 15:30 | December 20, 2025 14:45 | 23h 15m | 4,688 | 16K |
| 9 | August 13, 2025 20:00 | August 14, 2025 20:15 | 1d | 3,498 | 6,618 |
| 10 | June 20, 2025 12:30 | June 21, 2025 08:15 | 19h 45m | 3,437 | 11K |
Outage episodes by size in 2025: 202 reached 100+ customers, 40 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 Rockingham County reported on EIA Form 861 for 2025, 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 |
| Liberty Utilities (Granite State Electri | 2024 | 6.2 hrs | 1.55 | 1.5 hrs | 0.82 |
| 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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 154,048 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. Rockingham County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Rockingham County, NH annual power outage report, 2025, 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/2025/new-hampshire/rockingham-county