County annual report · FIPS 33011
2023 Hillsborough County, NH Power Outage Report
In 2023, customers in Hillsborough County, NH went without power for an average of 10.1 hours, a total of 2.0M customer-hours (New Hampshire average 9.5 hours). That ranks 5th worst of 10 New Hampshire counties and 838th of 2,977 nationally.
Compared with NH, the US and 2022
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Hillsborough County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 14, 2023 04:30 | March 18, 2023 07:15 | 4d 2h | 29,343 | 1.1M |
| 2 | January 23, 2023 01:45 | January 27, 2023 22:15 | 4d 20h | 22,819 | 626K |
| 3 | June 18, 2023 15:15 | June 18, 2023 21:15 | 6h | 13,729 | 3,501 |
| 4 | July 19, 2023 18:30 | July 20, 2023 00:15 | 5h 45m | 6,223 | 1,938 |
| 5 | May 21, 2023 10:00 | May 21, 2023 13:45 | 3h 45m | 5,122 | 2,426 |
| 6 | June 26, 2023 11:45 | June 27, 2023 05:15 | 17h 30m | 4,400 | 5,833 |
| 7 | December 18, 2023 08:30 | December 20, 2023 01:45 | 1d 17h | 4,214 | 28K |
| 8 | July 6, 2023 16:30 | July 7, 2023 00:45 | 8h 15m | 3,499 | 1,705 |
| 9 | July 16, 2023 11:30 | July 17, 2023 00:00 | 12h 30m | 3,318 | 5,093 |
| 10 | April 17, 2023 05:30 | April 17, 2023 10:15 | 4h 45m | 3,235 | 15K |
Outage episodes by size in 2023: 168 reached 100+ customers, 24 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 2023, 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 | 2023 | 11.1 hrs | 1.50 | 84 min | 0.74 |
| Liberty Utilities (Granite State Electri | 2023 | 4.0 hrs | 1.15 | 2.6 hrs | 0.88 |
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 2023; 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, 2023, 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/2023/new-hampshire/hillsborough-county