County annual report · FIPS 33009
2018 Grafton County, NH Power Outage Report
In 2018, customers in Grafton County, NH went without power for an average of 7.6 hours, a total of 378K customer-hours (New Hampshire average 5.8 hours). That ranks 4th worst of 10 New Hampshire counties and 724th of 2,798 nationally.
Compared with NH, the US and 2017
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Grafton County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 16, 2018 05:15 | April 18, 2018 21:45 | 2d 16h | 7,012 | 50K |
| 2 | November 13, 2018 12:00 | November 14, 2018 03:00 | 15h | 5,858 | 9,412 |
| 3 | November 27, 2018 01:45 | November 30, 2018 16:15 | 3d 14h | 5,215 | 131K |
| 4 | July 1, 2018 10:15 | July 1, 2018 18:00 | 7h 45m | 4,038 | 19K |
| 5 | May 4, 2018 18:15 | May 7, 2018 18:15 | 3d | 4,013 | 40K |
| 6 | March 30, 2018 09:00 | March 30, 2018 15:30 | 6h 30m | 3,583 | 12K |
| 7 | March 9, 2018 03:00 | March 9, 2018 05:00 | 2h | 2,514 | 3,246 |
| 8 | May 15, 2018 18:45 | May 16, 2018 02:00 | 7h 15m | 2,511 | 4,045 |
| 9 | October 27, 2018 21:30 | October 28, 2018 08:30 | 11h | 2,259 | 5,075 |
| 10 | April 10, 2018 12:45 | April 10, 2018 20:30 | 7h 45m | 2,128 | 1,077 |
Outage episodes by size in 2018: 104 reached 100+ customers, 19 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 2018, 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 | 2018 | 6.4 hrs | 1.88 | 2.0 hrs | 1.07 |
| Liberty Utilities (Granite State Electri | 2018 | 19.0 hrs | 1.87 | 2.6 hrs | 1.02 |
| 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 88% of New Hampshire's customers in 2018; 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, 2018, 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/2018/new-hampshire/grafton-county