County annual report · FIPS 25023
2025 Plymouth County, MA Power Outage Report
In 2025, customers in Plymouth County, MA went without power for an average of 2.4 hours, a total of 665K customer-hours (Massachusetts average 2.8 hours). That ranks 11th worst of 14 Massachusetts counties and 2284th 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 Plymouth 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 3, 2025 21:30 | July 4, 2025 02:00 | 4h 30m | 47,121 | 50K |
| 2 | July 4, 2025 03:00 | July 4, 2025 03:30 | 30m | 30,897 | 15K |
| 3 | July 4, 2025 17:00 | July 6, 2025 03:00 | 1d 10h | 19,723 | 172K |
| 4 | January 28, 2025 14:15 | January 29, 2025 04:15 | 14h | 15,663 | 22K |
| 5 | December 19, 2025 18:15 | December 21, 2025 13:30 | 1d 19h | 7,001 | 46K |
| 6 | July 7, 2025 10:45 | July 8, 2025 03:15 | 16h 30m | 5,697 | 4,200 |
| 7 | May 17, 2025 10:45 | May 17, 2025 18:15 | 7h 30m | 5,642 | 19K |
| 8 | July 10, 2025 10:15 | July 11, 2025 08:15 | 22h | 5,206 | 5,758 |
| 9 | June 10, 2025 16:45 | June 13, 2025 21:45 | 3d 5h | 4,769 | 12K |
| 10 | July 8, 2025 11:00 | July 10, 2025 04:00 | 1d 17h | 4,371 | 25K |
Outage episodes by size in 2025: 185 reached 100+ customers, 46 reached 1,000+ customers, 4 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 Plymouth 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 Hingham - (MA) | - | - | - | - | - |
| Hull Municipal Light Plant | - | - | - | - | - |
| Town of Middleborough - (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 ÷ 281,672 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. Plymouth County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Plymouth 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/plymouth-county