County annual report · FIPS 25013
2021 Hampden County, MA Power Outage Report
In 2021, customers in Hampden County, MA went without power for an average of 2.8 hours, a total of 552K customer-hours (Massachusetts average 7.4 hours). That ranks 9th worst of 14 Massachusetts counties and 1923rd 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 Hampden 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 3, 2021 19:00 | August 24, 2021 10:45 | 20d 15h | 6,978 | 47K |
| 2 | January 17, 2021 12:15 | January 17, 2021 20:45 | 8h 30m | 5,947 | 10K |
| 3 | March 1, 2021 21:15 | March 4, 2021 02:00 | 2d 4h | 3,884 | 36K |
| 4 | October 21, 2021 05:16 | November 23, 2021 16:30 | 33d 11h | 3,519 | 223K |
| 5 | August 24, 2021 11:45 | October 21, 2021 02:00 | 57d 14h | 2,603 | 62K |
| 6 | July 8, 2021 15:00 | August 3, 2021 16:30 | 26d 1h | 2,318 | 38K |
| 7 | April 21, 2021 20:15 | April 23, 2021 01:00 | 1d 4h | 2,222 | 7,394 |
| 8 | June 9, 2021 11:45 | July 8, 2021 14:00 | 29d 2h | 2,218 | 43K |
| 9 | December 6, 2021 19:30 | December 31, 2021 00:15 | 24d 4h | 2,082 | 24K |
| 10 | May 22, 2021 10:15 | May 22, 2021 13:30 | 3h 15m | 1,883 | 6,113 |
Outage episodes by size in 2021: 59 reached 100+ customers, 20 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 Hampden 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 |
| City of Chicopee - (MA) | 2021 | 28 min | 0.56 | - | - |
| City of Holyoke - (MA) | 2021 | 1.9 hrs | 1.34 | 82 min | 0.92 |
| City of Westfield - (MA) | 2021 | 4.6 hrs | 3.33 | 3.6 hrs | 2.95 |
| Town of Chester | - | - | - | - | - |
| City of Russell - (MA) | - | - | - | - | - |
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 ÷ 196,656 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. Hampden County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hampden 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/hampden-county