County annual report · FIPS 25007
2025 Dukes County, MA Power Outage Report
In 2025, customers in Dukes County, MA went without power for an average of 1.5 hours, a total of 31K customer-hours (Massachusetts average 2.8 hours). That ranks 13th worst of 14 Massachusetts counties and 2621st 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 Dukes County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 10, 2025 09:15 | July 10, 2025 16:15 | 7h | 10,157 | 7,079 |
| 2 | April 24, 2025 15:00 | April 24, 2025 15:45 | 45m | 1,822 | 498 |
| 3 | May 31, 2025 16:45 | June 1, 2025 04:15 | 11h 30m | 1,125 | 3,296 |
| 4 | December 11, 2025 10:30 | December 11, 2025 13:45 | 3h 15m | 849 | 1,649 |
| 5 | August 20, 2025 22:30 | August 21, 2025 17:45 | 19h 15m | 693 | 3,245 |
| 6 | November 1, 2025 00:15 | November 1, 2025 08:30 | 8h 15m | 590 | 1,452 |
| 7 | November 23, 2025 19:00 | November 23, 2025 20:45 | 1h 45m | 489 | 623 |
| 8 | January 2, 2025 14:45 | January 2, 2025 20:00 | 5h 15m | 373 | 1,236 |
| 9 | May 20, 2025 03:45 | May 20, 2025 07:00 | 3h 15m | 299 | 562 |
| 10 | October 13, 2025 14:15 | October 13, 2025 21:15 | 7h | 268 | 296 |
Outage episodes by size in 2025: 24 reached 100+ customers, 3 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 Dukes 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 |
|---|---|---|---|---|---|
| NSTAR Electric Company | 2024 | 81 min | 0.69 | 66 min | 0.64 |
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 ÷ 20,864 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. Dukes County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dukes 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/dukes-county