County annual report · FIPS 33015
2020 Rockingham County, NH Power Outage Report
In 2020, customers in Rockingham County, NH went without power for an average of 6.1 hours, a total of 933K customer-hours (New Hampshire average 7.1 hours). That ranks 7th worst of 10 New Hampshire counties and 1232nd of 3,019 nationally.
Compared with NH, the US and 2019
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Rockingham County, 2020
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 5, 2020 15:15 | December 9, 2020 03:00 | 3d 11h | 18,613 | 324K |
| 2 | February 7, 2020 13:30 | February 10, 2020 03:00 | 2d 13h | 16,571 | 136K |
| 3 | March 24, 2020 00:00 | March 24, 2020 22:45 | 22h 45m | 15,809 | 58K |
| 4 | January 23, 2020 14:45 | January 23, 2020 21:30 | 6h 45m | 10,287 | 7,120 |
| 5 | August 4, 2020 19:45 | August 8, 2020 16:45 | 3d 21h | 9,933 | 149K |
| 6 | April 20, 2020 10:00 | April 21, 2020 00:15 | 14h 15m | 6,895 | 6,087 |
| 7 | March 18, 2020 16:30 | March 18, 2020 23:15 | 6h 45m | 6,839 | 17K |
| 8 | July 31, 2020 12:15 | July 31, 2020 23:45 | 11h 30m | 6,066 | 6,546 |
| 9 | April 29, 2020 07:15 | April 29, 2020 09:30 | 2h 15m | 6,027 | 9,073 |
| 10 | June 5, 2020 09:30 | June 5, 2020 10:45 | 1h 15m | 6,021 | 5,338 |
Outage episodes by size in 2020: 179 reached 100+ customers, 32 reached 1,000+ customers, 4 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 Rockingham County reported on EIA Form 861 for 2020, 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 | 2020 | 7.7 hrs | 1.49 | 1.6 hrs | 0.81 |
| Liberty Utilities (Granite State Electri | 2020 | 2.5 hrs | 1.18 | 1.7 hrs | 0.99 |
| Unitil Energy Systems | 2020 | 2.9 hrs | 1.86 | 2.0 hrs | 1.60 |
| 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 99% of New Hampshire's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 154,048 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. Rockingham County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Rockingham County, NH annual power outage report, 2020, 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/2020/new-hampshire/rockingham-county