County annual report · FIPS 33019
2023 Sullivan County, NH Power Outage Report
In 2023, customers in Sullivan County, NH went without power for an average of 15.1 hours, a total of 303K customer-hours (New Hampshire average 9.5 hours). That ranks 2nd worst of 10 New Hampshire counties and 576th of 2,977 nationally.
Compared with NH, the US and 2022
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Sullivan County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 14, 2023 07:30 | March 18, 2023 02:00 | 3d 18h | 9,262 | 188K |
| 2 | December 18, 2023 07:45 | December 20, 2023 04:45 | 1d 21h | 5,168 | 37K |
| 3 | June 28, 2023 20:45 | June 29, 2023 01:00 | 4h 15m | 2,788 | 3,956 |
| 4 | September 8, 2023 02:15 | September 8, 2023 19:00 | 16h 45m | 2,778 | 14K |
| 5 | January 26, 2023 05:45 | January 26, 2023 22:30 | 16h 45m | 876 | 1,202 |
| 6 | September 29, 2023 16:30 | September 30, 2023 02:30 | 10h | 843 | 2,835 |
| 7 | September 16, 2023 20:15 | September 17, 2023 00:45 | 4h 30m | 842 | 649 |
| 8 | May 18, 2023 11:45 | May 18, 2023 14:15 | 2h 30m | 834 | 1,877 |
| 9 | October 21, 2023 18:30 | October 21, 2023 19:45 | 1h 15m | 834 | 1,043 |
| 10 | December 12, 2023 06:15 | December 12, 2023 12:15 | 6h | 832 | 1,300 |
Outage episodes by size in 2023: 66 reached 100+ customers, 4 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 Sullivan County reported on EIA Form 861 for 2023, 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 | 2023 | 11.1 hrs | 1.50 | 84 min | 0.74 |
| Liberty Utilities (Granite State Electri | 2023 | 4.0 hrs | 1.15 | 2.6 hrs | 0.88 |
| 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 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 20,079 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. Sullivan County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sullivan County, NH annual power outage report, 2023, 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/2023/new-hampshire/sullivan-county