County annual report · FIPS 33011
2018 Hillsborough County, NH Power Outage Report
In 2018, customers in Hillsborough County, NH went without power for an average of 4.7 hours, a total of 929K customer-hours (New Hampshire average 5.8 hours). That ranks 8th worst of 10 New Hampshire counties and 1097th 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 Hillsborough 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 4, 2018 23:30 | April 6, 2018 20:15 | 1d 20h | 28,312 | 133K |
| 2 | June 18, 2018 14:00 | June 20, 2018 20:15 | 2d 6h | 22,246 | 160K |
| 3 | March 28, 2018 19:45 | March 28, 2018 20:00 | 15m | 13,098 | 3,275 |
| 4 | May 5, 2018 01:45 | May 11, 2018 17:30 | 6d 15h | 11,162 | 69K |
| 5 | March 8, 2018 01:45 | March 11, 2018 22:30 | 3d 20h | 9,491 | 278K |
| 6 | April 30, 2018 11:15 | April 30, 2018 12:00 | 45m | 7,525 | 1,882 |
| 7 | June 9, 2018 18:00 | June 10, 2018 00:00 | 6h | 5,274 | 6,730 |
| 8 | June 1, 2018 08:00 | June 1, 2018 10:30 | 2h 30m | 4,436 | 7,501 |
| 9 | August 7, 2018 16:15 | August 8, 2018 05:30 | 13h 15m | 3,375 | 18K |
| 10 | April 16, 2018 07:45 | April 17, 2018 15:30 | 1d 7h | 3,068 | 7,957 |
Outage episodes by size in 2018: 164 reached 100+ customers, 32 reached 1,000+ customers, 4 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 Hillsborough 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 |
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 ÷ 196,402 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. Hillsborough County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hillsborough 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/hillsborough-county