County annual report · FIPS 33015
2017 Rockingham County, NH Power Outage Report
In 2017, customers in Rockingham County, NH went without power for an average of 20.3 hours, a total of 3.1M customer-hours (New Hampshire average 14.3 hours). That ranks 4th worst of 10 New Hampshire counties and 270th of 2,786 nationally.
Compared with NH, the US and 2016
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Rockingham County, 2017
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 29, 2017 23:00 | November 5, 2017 04:00 | 6d 5h | 80,811 | 2.2M |
| 2 | March 14, 2017 12:00 | March 16, 2017 10:30 | 1d 22h | 54,648 | 541K |
| 3 | July 24, 2017 14:45 | July 24, 2017 15:45 | 1h | 29,332 | 15K |
| 4 | April 1, 2017 06:15 | April 1, 2017 18:15 | 12h | 13,437 | 45K |
| 5 | May 18, 2017 22:45 | May 20, 2017 00:15 | 1d 1h | 12,058 | 41K |
| 6 | January 4, 2017 21:00 | January 5, 2017 00:45 | 3h 45m | 10,068 | 11K |
| 7 | January 24, 2017 07:15 | January 24, 2017 17:15 | 10h | 9,290 | 11K |
| 8 | March 2, 2017 10:45 | March 3, 2017 16:15 | 1d 5h | 9,013 | 18K |
| 9 | November 5, 2017 05:00 | November 8, 2017 15:45 | 3d 10h | 8,687 | 4,134 |
| 10 | April 21, 2017 07:30 | April 21, 2017 08:15 | 45m | 6,202 | 3,578 |
Outage episodes by size in 2017: 214 reached 100+ customers, 48 reached 1,000+ customers, 6 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 2017, 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 | 2017 | 16.1 hrs | 1.92 | 2.0 hrs | 1.11 |
| Liberty Utilities (Granite State Electri | 2017 | 6.8 hrs | 1.67 | 2.6 hrs | 1.29 |
| Unitil Energy Systems | 2017 | 14.4 hrs | 2.74 | 1.9 hrs | 1.33 |
| 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 2017; 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, 2017, 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/2017/new-hampshire/rockingham-county