County annual report · FIPS 25015
2021 Hampshire County, MA Power Outage Report
In 2021, customers in Hampshire County, MA went without power for an average of 1.9 hours, a total of 194K customer-hours (Massachusetts average 7.4 hours). That ranks 11th worst of 14 Massachusetts counties and 2260th of 2,974 nationally.
Compared with MA, the US and 2020
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Hampshire 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 | August 12, 2021 20:15 | August 14, 2021 00:45 | 1d 4h | 13,543 | 52K |
| 2 | March 1, 2021 21:45 | March 4, 2021 02:15 | 2d 4h | 6,522 | 37K |
| 3 | March 13, 2021 03:45 | March 13, 2021 17:00 | 13h 15m | 3,390 | 2,474 |
| 4 | April 30, 2021 17:30 | May 1, 2021 06:30 | 13h | 2,995 | 5,815 |
| 5 | August 22, 2021 15:00 | August 23, 2021 05:00 | 14h | 2,526 | 3,951 |
| 6 | July 16, 2021 09:15 | July 16, 2021 15:15 | 6h | 2,333 | 1,364 |
| 7 | September 21, 2021 19:00 | September 22, 2021 01:15 | 6h 15m | 2,162 | 3,503 |
| 8 | December 3, 2021 02:00 | December 4, 2021 00:45 | 22h 45m | 2,029 | 4,241 |
| 9 | February 17, 2021 19:00 | February 17, 2021 21:15 | 2h 15m | 2,010 | 513 |
| 10 | October 24, 2021 18:00 | October 24, 2021 21:15 | 3h 15m | 1,980 | 999 |
Outage episodes by size in 2021: 94 reached 100+ customers, 22 reached 1,000+ customers, 1 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 Hampshire 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 |
|---|---|---|---|---|---|
| Massachusetts Electric Co | 2021 | 7.9 hrs | 1.26 | 1.6 hrs | 0.94 |
| NSTAR Electric Company | 2021 | 10.7 hrs | 1.10 | 76 min | 0.73 |
| Town of South Hadley - (MA) | 2018 | 15 min | 0.18 | 15 min | 0.18 |
| University of Massachusetts Amherst | - | - | - | - | - |
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 Massachusetts's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 101,974 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. Hampshire County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hampshire County, MA 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/massachusetts/hampshire-county