County annual report · FIPS 33007
2021 Coos County, NH Power Outage Report
In 2021, customers in Coos County, NH went without power for an average of 5.0 hours, a total of 119K customer-hours (New Hampshire average 3.4 hours). That ranks 5th worst of 10 New Hampshire counties and 1337th of 2,974 nationally.
Compared with NH, the US and 2020
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Coos County, 2021
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 4, 2021 20:30 | June 4, 2021 21:30 | 1h | 9,692 | 4,846 |
| 2 | March 2, 2021 03:30 | March 3, 2021 20:15 | 1d 16h | 7,004 | 37K |
| 3 | December 17, 2021 09:15 | December 17, 2021 18:30 | 9h 15m | 4,214 | 9,606 |
| 4 | June 7, 2021 18:15 | June 7, 2021 19:00 | 45m | 1,849 | 463 |
| 5 | January 17, 2021 22:00 | January 18, 2021 05:30 | 7h 30m | 1,834 | 5,363 |
| 6 | January 16, 2021 16:00 | January 17, 2021 07:30 | 15h 30m | 1,637 | 7,902 |
| 7 | November 13, 2021 16:15 | November 13, 2021 18:30 | 2h 15m | 1,619 | 811 |
| 8 | October 4, 2021 13:15 | October 4, 2021 14:30 | 1h 15m | 1,616 | 1,213 |
| 9 | July 31, 2021 05:30 | July 31, 2021 09:45 | 4h 15m | 1,556 | 6,613 |
| 10 | December 12, 2021 01:00 | December 13, 2021 01:45 | 1d | 1,514 | 6,501 |
Outage episodes by size in 2021: 46 reached 100+ customers, 14 reached 1,000+ customers, 0 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 Coos County reported on EIA Form 861 for 2021, 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 | 2021 | 3.0 hrs | 1.07 | 1.6 hrs | 0.83 |
| 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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 24,038 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. Coos County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Coos County, NH annual power outage report, 2021, 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/2021/new-hampshire/coos-county