County annual report · FIPS 33011
2025 Hillsborough County, NH Power Outage Report
In 2025, customers in Hillsborough County, NH went without power for an average of 2.3 hours, a total of 454K customer-hours (New Hampshire average 3.8 hours). That ranks 9th worst of 10 New Hampshire counties and 2309th 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 Hillsborough 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 | October 7, 2025 14:00 | October 7, 2025 20:15 | 6h 15m | 18,617 | 4,717 |
| 2 | March 7, 2025 08:30 | March 9, 2025 07:45 | 1d 23h | 8,697 | 76K |
| 3 | October 30, 2025 17:00 | November 2, 2025 02:45 | 2d 9h | 5,310 | 53K |
| 4 | August 24, 2025 06:30 | August 24, 2025 08:45 | 2h 15m | 4,017 | 2,020 |
| 5 | September 25, 2025 17:45 | September 26, 2025 21:30 | 1d 3h | 3,936 | 3,820 |
| 6 | January 2, 2025 10:15 | January 3, 2025 11:15 | 1d 1h | 3,768 | 21K |
| 7 | September 6, 2025 19:30 | September 8, 2025 05:30 | 1d 10h | 3,291 | 13K |
| 8 | June 20, 2025 09:45 | June 21, 2025 15:15 | 1d 5h | 3,140 | 15K |
| 9 | August 13, 2025 17:15 | August 15, 2025 00:45 | 1d 7h | 2,992 | 15K |
| 10 | November 8, 2025 12:45 | November 8, 2025 16:15 | 3h 30m | 2,603 | 4,306 |
Outage episodes by size in 2025: 175 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 Hillsborough 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 |
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 ÷ 196,402 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. Hillsborough County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hillsborough 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/hillsborough-county