County annual report · FIPS 33009
2023 Grafton County, NH Power Outage Report
In 2023, customers in Grafton County, NH went without power for an average of 5.1 hours, a total of 255K customer-hours (New Hampshire average 9.5 hours). That ranks 9th worst of 10 New Hampshire counties and 1459th 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 Grafton 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 | February 3, 2023 22:45 | February 5, 2023 02:30 | 1d 3h | 6,013 | 6,104 |
| 2 | September 27, 2023 21:45 | September 27, 2023 23:00 | 1h 15m | 5,761 | 2,686 |
| 3 | December 18, 2023 09:45 | December 21, 2023 00:45 | 2d 15h | 5,247 | 91K |
| 4 | April 30, 2023 19:30 | May 1, 2023 12:30 | 17h | 3,566 | 11K |
| 5 | March 14, 2023 06:15 | March 16, 2023 19:15 | 2d 13h | 3,228 | 20K |
| 6 | December 4, 2023 05:45 | December 4, 2023 23:30 | 17h 45m | 2,630 | 8,057 |
| 7 | April 1, 2023 01:15 | April 1, 2023 19:30 | 18h 15m | 2,596 | 6,731 |
| 8 | March 6, 2023 20:15 | March 7, 2023 01:30 | 5h 15m | 2,174 | 5,745 |
| 9 | April 23, 2023 19:00 | April 23, 2023 22:45 | 3h 45m | 2,067 | 3,639 |
| 10 | May 11, 2023 18:00 | May 11, 2023 20:30 | 2h 30m | 1,876 | 1,421 |
Outage episodes by size in 2023: 104 reached 100+ customers, 18 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 Grafton 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 | - | - | - | - | - |
| Precinct of Woodsville | - | - | - | - | - |
| Town of Ashland | - | - | - | - | - |
| Town of Littleton - (NH) | - | - | - | - | - |
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 ÷ 49,895 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. Grafton County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grafton 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/grafton-county