County annual report · FIPS 33007
2025 Coos County, NH Power Outage Report
In 2025, customers in Coos County, NH went without power for an average of 3.5 hours, a total of 85K customer-hours (New Hampshire average 3.8 hours). That ranks 5th worst of 10 New Hampshire counties and 1889th 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 Coos 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 | December 19, 2025 10:30 | December 21, 2025 06:15 | 1d 19h | 3,849 | 28K |
| 2 | November 1, 2025 09:45 | November 1, 2025 19:45 | 10h | 2,427 | 4,704 |
| 3 | June 12, 2025 16:15 | June 12, 2025 19:45 | 3h 30m | 2,186 | 2,561 |
| 4 | February 18, 2025 01:45 | February 18, 2025 07:30 | 5h 45m | 1,920 | 3,165 |
| 5 | February 17, 2025 20:45 | February 18, 2025 00:45 | 4h | 1,897 | 2,383 |
| 6 | March 7, 2025 17:15 | March 8, 2025 06:15 | 13h | 1,729 | 4,682 |
| 7 | April 19, 2025 09:45 | April 19, 2025 11:00 | 1h 15m | 1,670 | 2,088 |
| 8 | July 12, 2025 19:00 | July 12, 2025 22:30 | 3h 30m | 1,581 | 1,584 |
| 9 | November 6, 2025 09:45 | November 6, 2025 12:00 | 2h 15m | 1,352 | 3,042 |
| 10 | December 29, 2025 12:30 | December 30, 2025 02:15 | 13h 45m | 1,133 | 2,040 |
Outage episodes by size in 2025: 55 reached 100+ customers, 11 reached 1,000+ customers, 0 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 Coos 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 |
| 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 ÷ 24,038 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. Coos County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Coos 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/coos-county