County annual report · FIPS 33015
2018 Rockingham County, NH Power Outage Report
In 2018, customers in Rockingham County, NH went without power for an average of 6.0 hours, a total of 930K customer-hours (New Hampshire average 5.8 hours). That ranks 5th worst of 10 New Hampshire counties and 909th of 2,798 nationally.
Compared with NH, the US and 2017
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Rockingham County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 18, 2018 21:30 | June 20, 2018 18:30 | 1d 21h | 30,706 | 142K |
| 2 | March 8, 2018 02:15 | March 12, 2018 03:15 | 4d 1h | 29,794 | 540K |
| 3 | May 5, 2018 00:00 | May 6, 2018 21:45 | 1d 21h | 11,429 | 33K |
| 4 | April 7, 2018 01:45 | April 7, 2018 03:00 | 1h 15m | 6,523 | 2,227 |
| 5 | April 4, 2018 23:15 | April 6, 2018 10:15 | 1d 11h | 5,719 | 47K |
| 6 | August 14, 2018 06:30 | August 15, 2018 00:45 | 18h 15m | 4,613 | 2,386 |
| 7 | October 16, 2018 03:45 | October 16, 2018 17:45 | 14h | 4,233 | 8,312 |
| 8 | November 20, 2018 18:00 | November 21, 2018 07:00 | 13h | 2,945 | 2,317 |
| 9 | November 2, 2018 17:45 | November 2, 2018 19:15 | 1h 30m | 2,461 | 1,262 |
| 10 | May 17, 2018 05:45 | May 17, 2018 19:15 | 13h 30m | 2,389 | 4,823 |
Outage episodes by size in 2018: 161 reached 100+ customers, 20 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 Rockingham County reported on EIA Form 861 for 2018, 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 | 2018 | 6.4 hrs | 1.88 | 2.0 hrs | 1.07 |
| Liberty Utilities (Granite State Electri | 2018 | 19.0 hrs | 1.87 | 2.6 hrs | 1.02 |
| Unitil Energy Systems | 2018 | 8.2 hrs | 1.94 | 1.9 hrs | 1.20 |
| 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 88% of New Hampshire's customers in 2018; 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, 2018, 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/2018/new-hampshire/rockingham-county