County annual report · FIPS 33011
2017 Hillsborough County, NH Power Outage Report
In 2017, customers in Hillsborough County, NH went without power for an average of 9.5 hours, a total of 1.9M customer-hours (New Hampshire average 14.3 hours). That ranks 9th worst of 10 New Hampshire counties and 557th of 2,786 nationally.
Compared with NH, the US and 2016
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Hillsborough County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 30, 2017 00:15 | November 5, 2017 00:15 | 6d | 58,016 | 1.5M |
| 2 | March 2, 2017 09:00 | March 4, 2017 01:30 | 1d 16h | 15,026 | 81K |
| 3 | July 8, 2017 10:15 | July 10, 2017 02:00 | 1d 15h | 8,367 | 37K |
| 4 | September 25, 2017 11:15 | September 26, 2017 02:30 | 15h 15m | 6,781 | 2,373 |
| 5 | November 16, 2017 13:45 | November 17, 2017 02:15 | 12h 30m | 6,268 | 3,279 |
| 6 | June 21, 2017 12:45 | June 22, 2017 08:30 | 19h 45m | 5,436 | 4,058 |
| 7 | March 9, 2017 08:00 | March 10, 2017 04:30 | 20h 30m | 4,564 | 17K |
| 8 | May 17, 2017 18:45 | May 20, 2017 01:15 | 2d 6h | 3,818 | 13K |
| 9 | June 22, 2017 20:30 | June 22, 2017 23:15 | 2h 45m | 3,603 | 1,680 |
| 10 | April 1, 2017 05:45 | April 1, 2017 18:00 | 12h 15m | 3,036 | 7,704 |
Outage episodes by size in 2017: 209 reached 100+ customers, 33 reached 1,000+ customers, 2 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 2017, 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 | 2017 | 16.1 hrs | 1.92 | 2.0 hrs | 1.11 |
| Liberty Utilities (Granite State Electri | 2017 | 6.8 hrs | 1.67 | 2.6 hrs | 1.29 |
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 2017; 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, 2017, 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/2017/new-hampshire/hillsborough-county