County annual report · FIPS 33011
2020 Hillsborough County, NH Power Outage Report
In 2020, customers in Hillsborough County, NH went without power for an average of 4.8 hours, a total of 938K customer-hours (New Hampshire average 7.1 hours). That ranks 10th worst of 10 New Hampshire counties and 1438th of 3,019 nationally.
Compared with NH, the US and 2019
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Hillsborough County, 2020
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 23, 2020 22:00 | March 25, 2020 03:00 | 1d 5h | 18,919 | 104K |
| 2 | August 4, 2020 20:00 | August 8, 2020 04:30 | 3d 8h | 16,921 | 243K |
| 3 | December 5, 2020 15:45 | December 8, 2020 06:00 | 2d 14h | 10,864 | 235K |
| 4 | February 7, 2020 17:00 | February 9, 2020 18:30 | 2d 1h | 8,023 | 72K |
| 5 | August 22, 2020 10:30 | August 22, 2020 12:30 | 2h | 4,019 | 6,232 |
| 6 | July 8, 2020 21:00 | July 9, 2020 06:30 | 9h 30m | 3,643 | 4,292 |
| 7 | November 16, 2020 02:45 | November 17, 2020 02:45 | 1d | 3,452 | 17K |
| 8 | September 30, 2020 04:00 | September 30, 2020 21:15 | 17h 15m | 3,443 | 13K |
| 9 | August 8, 2020 06:00 | August 8, 2020 21:30 | 15h 30m | 2,970 | 2,772 |
| 10 | September 3, 2020 12:30 | September 3, 2020 19:45 | 7h 15m | 2,966 | 1,081 |
Outage episodes by size in 2020: 203 reached 100+ customers, 28 reached 1,000+ customers, 3 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 2020, 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 | 2020 | 7.7 hrs | 1.49 | 1.6 hrs | 0.81 |
| Liberty Utilities (Granite State Electri | 2020 | 2.5 hrs | 1.18 | 1.7 hrs | 0.99 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 99% of New Hampshire's customers in 2020; 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, 2020, 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/2020/new-hampshire/hillsborough-county