County annual report · FIPS 25005
2025 Bristol County, MA Power Outage Report
In 2025, customers in Bristol County, MA went without power for an average of 2.3 hours, a total of 641K customer-hours (Massachusetts average 2.8 hours). That ranks 12th worst of 14 Massachusetts counties and 2328th 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 Bristol 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 23:00 | July 4, 2025 02:00 | 3h | 38,360 | 63K |
| 2 | July 4, 2025 03:00 | July 4, 2025 03:30 | 30m | 34,576 | 17K |
| 3 | August 14, 2025 11:15 | August 15, 2025 15:30 | 1d 4h | 27,781 | 14K |
| 4 | July 7, 2025 11:00 | July 8, 2025 03:00 | 16h | 15,505 | 16K |
| 5 | July 4, 2025 17:00 | July 6, 2025 22:15 | 2d 5h | 8,196 | 128K |
| 6 | December 19, 2025 18:15 | December 21, 2025 02:15 | 1d 8h | 8,171 | 71K |
| 7 | July 13, 2025 22:45 | July 14, 2025 08:30 | 9h 45m | 7,395 | 4,299 |
| 8 | May 6, 2025 20:30 | May 7, 2025 09:15 | 12h 45m | 7,149 | 3,605 |
| 9 | July 26, 2025 23:15 | July 27, 2025 03:45 | 4h 30m | 6,831 | 8,857 |
| 10 | July 31, 2025 17:00 | August 1, 2025 00:15 | 7h 15m | 6,731 | 7,062 |
Outage episodes by size in 2025: 173 reached 100+ customers, 57 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 Bristol 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 Taunton | 2024 | 3.2 hrs | 2.37 | 3.2 hrs | 2.37 |
| Town of Mansfield - (MA) | 2024 | 16 min | 0.12 | 10 min | 0.10 |
| Town of North Attleborough - (MA) | 2024 | 6 min | 0.09 | 6 min | 0.09 |
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 ÷ 284,254 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. Bristol County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Bristol 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/bristol-county