County annual report · FIPS 33019
2025 Sullivan County, NH Power Outage Report
In 2025, customers in Sullivan County, NH went without power for an average of 10.2 hours, a total of 205K customer-hours (New Hampshire average 3.8 hours). That ranks 3rd worst of 10 New Hampshire counties and 784th 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 Sullivan 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 29, 2025 10:15 | December 31, 2025 07:30 | 1d 21h | 5,909 | 47K |
| 2 | March 30, 2025 09:30 | April 1, 2025 17:45 | 2d 8h | 4,740 | 58K |
| 3 | June 20, 2025 13:00 | June 21, 2025 09:15 | 20h 15m | 4,516 | 13K |
| 4 | January 1, 2025 09:45 | January 1, 2025 15:45 | 6h | 3,023 | 6,588 |
| 5 | January 2, 2025 14:15 | January 3, 2025 11:00 | 20h 45m | 2,956 | 7,534 |
| 6 | March 7, 2025 13:45 | March 9, 2025 03:45 | 1d 14h | 2,060 | 3,922 |
| 7 | July 1, 2025 11:30 | July 1, 2025 12:00 | 30m | 2,045 | 1,023 |
| 8 | August 14, 2025 12:30 | August 14, 2025 21:30 | 9h | 1,588 | 1,954 |
| 9 | November 4, 2025 13:30 | November 5, 2025 01:00 | 11h 30m | 1,587 | 3,387 |
| 10 | April 27, 2025 22:30 | April 28, 2025 06:15 | 7h 45m | 1,577 | 6,494 |
Outage episodes by size in 2025: 51 reached 100+ customers, 12 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 Sullivan 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 |
| 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 ÷ 20,079 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. Sullivan County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sullivan 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/sullivan-county