County annual report · FIPS 33013
2017 Merrimack County, NH Power Outage Report
In 2017, customers in Merrimack County, NH went without power for an average of 11.2 hours, a total of 1.3M customer-hours (New Hampshire average 14.3 hours). That ranks 8th worst of 10 New Hampshire counties and 483rd 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 Merrimack 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 10:45 | November 4, 2017 21:45 | 6d 11h | 37,350 | 1.0M |
| 2 | October 10, 2017 14:45 | October 10, 2017 18:45 | 4h | 7,366 | 1,919 |
| 3 | March 2, 2017 11:00 | March 3, 2017 11:45 | 1d | 7,007 | 32K |
| 4 | April 1, 2017 03:00 | April 1, 2017 18:15 | 15h 15m | 6,861 | 16K |
| 5 | October 24, 2017 20:45 | October 25, 2017 11:15 | 14h 30m | 6,696 | 17K |
| 6 | June 2, 2017 22:00 | June 3, 2017 07:30 | 9h 30m | 6,513 | 7,868 |
| 7 | July 19, 2017 20:30 | July 19, 2017 22:45 | 2h 15m | 5,727 | 5,730 |
| 8 | March 27, 2017 14:30 | March 27, 2017 16:30 | 2h | 5,507 | 2,646 |
| 9 | January 18, 2017 16:45 | January 18, 2017 19:30 | 2h 45m | 4,529 | 2,274 |
| 10 | August 4, 2017 20:00 | August 5, 2017 05:45 | 9h 45m | 3,220 | 3,902 |
Outage episodes by size in 2017: 165 reached 100+ customers, 42 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 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 |
| 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 ÷ 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, 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/merrimack-county