County annual report · FIPS 33005
2021 Cheshire County, NH Power Outage Report
In 2021, customers in Cheshire County, NH went without power for an average of 5.3 hours, a total of 192K customer-hours (New Hampshire average 3.4 hours). That ranks 4th worst of 10 New Hampshire counties and 1269th of 2,974 nationally.
Compared with NH, the US and 2020
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Cheshire County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 30, 2021 20:30 | July 2, 2021 05:30 | 1d 9h | 5,875 | 35K |
| 2 | October 22, 2021 20:30 | October 22, 2021 22:00 | 1h 30m | 5,269 | 2,632 |
| 3 | March 1, 2021 22:45 | March 4, 2021 01:30 | 2d 2h | 3,297 | 38K |
| 4 | April 16, 2021 04:45 | April 17, 2021 00:00 | 19h 15m | 2,226 | 12K |
| 5 | September 15, 2021 20:45 | September 16, 2021 14:00 | 17h 15m | 2,036 | 2,457 |
| 6 | April 30, 2021 16:30 | April 30, 2021 23:30 | 7h | 1,813 | 1,512 |
| 7 | August 19, 2021 01:30 | August 19, 2021 15:45 | 14h 15m | 1,789 | 16K |
| 8 | December 12, 2021 03:30 | December 12, 2021 17:30 | 14h | 1,756 | 8,812 |
| 9 | August 28, 2021 12:00 | August 28, 2021 16:45 | 4h 45m | 1,650 | 4,125 |
| 10 | May 8, 2021 07:30 | May 8, 2021 10:45 | 3h 15m | 1,318 | 2,416 |
Outage episodes by size in 2021: 85 reached 100+ customers, 12 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 Cheshire County reported on EIA Form 861 for 2021, 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 | 2021 | 3.0 hrs | 1.07 | 1.6 hrs | 0.83 |
| Liberty Utilities (Granite State Electri | 2021 | 2.8 hrs | 1.04 | 1.8 hrs | 0.85 |
| New Hampshire Elec Coop Inc | - | - | - | - | - |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 36,014 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. Cheshire County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cheshire County, NH annual power outage report, 2021, 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/2021/new-hampshire/cheshire-county