County annual report · FIPS 33013
2015 Merrimack County, NH Power Outage Report
In 2015, customers in Merrimack County, NH went without power for an average of 2.3 hours, a total of 271K customer-hours (New Hampshire average 2.3 hours). That ranks 5th worst of 10 New Hampshire counties and 1114th of 2,484 nationally.
Compared with NH, the US
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Merrimack County, 2015
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, 2015 13:30 | December 5, 2015 17:45 | 4h 15m | 27,800 | 52K |
| 2 | July 20, 2015 00:15 | July 21, 2015 16:00 | 1d 15h | 6,376 | 63K |
| 3 | October 29, 2015 18:00 | October 30, 2015 01:15 | 7h 15m | 5,535 | 10K |
| 4 | August 27, 2015 13:30 | August 27, 2015 16:45 | 3h 15m | 5,454 | 4,469 |
| 5 | October 11, 2015 21:00 | October 12, 2015 03:00 | 6h | 4,643 | 12K |
| 6 | September 9, 2015 00:30 | September 9, 2015 07:15 | 6h 45m | 4,126 | 4,762 |
| 7 | June 28, 2015 09:15 | June 29, 2015 03:15 | 18h | 3,458 | 9,401 |
| 8 | August 11, 2015 23:15 | August 12, 2015 04:15 | 5h | 3,024 | 7,006 |
| 9 | April 13, 2015 14:30 | April 13, 2015 14:45 | 15m | 2,544 | 636 |
| 10 | March 14, 2015 23:45 | March 15, 2015 02:45 | 3h | 2,313 | 3,937 |
Outage episodes by size in 2015: 113 reached 100+ customers, 18 reached 1,000+ customers, 1 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 Merrimack County reported on EIA Form 861 for 2015, 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 | 2015 | 1.9 hrs | 1.09 | 1.8 hrs | 1.05 |
| Unitil Energy Systems | 2015 | 1.9 hrs | 1.58 | 1.9 hrs | 1.58 |
| 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 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 115,899 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. Merrimack County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Merrimack County, NH annual power outage report, 2015, 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/2015/new-hampshire/merrimack-county