County annual report · FIPS 33011
2024 Hillsborough County, NH Power Outage Report
In 2024, customers in Hillsborough County, NH went without power for an average of 6.9 hours, a total of 1.4M customer-hours (New Hampshire average 14.2 hours). That ranks 9th worst of 10 New Hampshire counties and 1265th 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 Hillsborough 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 | April 4, 2024 02:00 | April 7, 2024 18:15 | 3d 16h | 21,826 | 481K |
| 2 | July 16, 2024 22:45 | July 18, 2024 09:15 | 1d 10h | 17,370 | 71K |
| 3 | March 23, 2024 16:45 | March 27, 2024 02:30 | 3d 9h | 16,635 | 564K |
| 4 | September 3, 2024 10:15 | September 3, 2024 13:00 | 2h 45m | 7,902 | 2,226 |
| 5 | February 28, 2024 20:15 | March 1, 2024 09:45 | 1d 13h | 4,423 | 27K |
| 6 | July 10, 2024 09:30 | July 11, 2024 01:15 | 15h 45m | 4,361 | 3,095 |
| 7 | March 11, 2024 11:00 | March 12, 2024 07:30 | 20h 30m | 3,882 | 12K |
| 8 | February 9, 2024 23:45 | February 10, 2024 12:15 | 12h 30m | 3,815 | 3,650 |
| 9 | August 19, 2024 12:00 | August 20, 2024 17:30 | 1d 5h | 2,584 | 16K |
| 10 | January 29, 2024 00:15 | January 30, 2024 01:45 | 1d 1h | 2,485 | 28K |
Outage episodes by size in 2024: 173 reached 100+ customers, 22 reached 1,000+ customers, 3 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 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 |
| 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 2024; 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, 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/hillsborough-county