County annual report · FIPS 25013
2025 Hampden County, MA Power Outage Report
In 2025, customers in Hampden County, MA went without power for an average of 2.7 hours, a total of 540K customer-hours (Massachusetts average 2.8 hours). That ranks 10th worst of 14 Massachusetts counties and 2155th of 3,000 nationally.
Compared with MA, the US and 2024
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Hampden County, 2025
The 8 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 20, 2025 23:30 | August 5, 2025 13:00 | 137d 13h | 20,087 | 291K |
| 2 | September 8, 2025 22:30 | January 1, 2026 00:00 | 114d 1h | 5,990 | 105K |
| 3 | August 5, 2025 14:15 | September 8, 2025 21:30 | 34d 7h | 5,528 | 89K |
| 4 | January 9, 2025 11:45 | March 20, 2025 20:30 | 70d 8h | 2,673 | 52K |
| 5 | January 1, 2025 00:00 | January 8, 2025 18:00 | 7d 18h | 426 | 3,263 |
| 6 | January 9, 2025 03:00 | January 9, 2025 07:30 | 4h 30m | 87 | 220 |
| 7 | January 8, 2025 19:00 | January 8, 2025 21:30 | 2h 30m | 7 | 6 |
| 8 | January 9, 2025 08:45 | January 9, 2025 09:15 | 30m | 1 | 1 |
Outage episodes by size in 2025: 5 reached 100+ customers, 4 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 Hampden County reported on EIA Form 861 for 2025, 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 | 2024 | 2.2 hrs | 1.00 | 1.5 hrs | 0.84 |
| NSTAR Electric Company | 2024 | 81 min | 0.69 | 66 min | 0.64 |
| City of Chicopee - (MA) | 2024 | 11 min | 0.21 | - | - |
| City of Holyoke - (MA) | 2024 | 62 min | 1.26 | 62 min | 1.26 |
| City of Westfield - (MA) | 2024 | 2.0 hrs | 1.74 | 46 min | 1.00 |
| 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 n/a of Massachusetts's customers in 2025; 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, 2025, 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/2025/massachusetts/hampden-county