County annual report · FIPS 25005
2023 Bristol County, MA Power Outage Report
In 2023, customers in Bristol County, MA went without power for an average of 3.5 hours, a total of 982K customer-hours (Massachusetts average 5.1 hours). That ranks 11th worst of 14 Massachusetts counties and 1812th of 2,977 nationally.
Compared with MA, the US and 2022
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Bristol County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 18, 2023 10:15 | December 22, 2023 03:45 | 3d 17h | 33,055 | 718K |
| 2 | July 4, 2023 19:15 | July 5, 2023 05:15 | 10h | 13,585 | 15K |
| 3 | December 11, 2023 06:15 | December 12, 2023 01:45 | 19h 30m | 4,518 | 13K |
| 4 | February 3, 2023 14:30 | February 5, 2023 09:00 | 1d 18h | 3,865 | 12K |
| 5 | July 24, 2023 16:00 | July 25, 2023 03:45 | 11h 45m | 3,592 | 2,508 |
| 6 | July 27, 2023 20:45 | July 28, 2023 15:15 | 18h 30m | 3,352 | 11K |
| 7 | September 13, 2023 18:00 | September 13, 2023 18:45 | 45m | 2,844 | 2,133 |
| 8 | December 27, 2023 23:15 | December 28, 2023 04:00 | 4h 45m | 2,663 | 5,506 |
| 9 | October 8, 2023 02:45 | October 8, 2023 05:00 | 2h 15m | 2,554 | 3,347 |
| 10 | July 6, 2023 09:30 | July 7, 2023 03:15 | 17h 45m | 2,553 | 2,037 |
Outage episodes by size in 2023: 133 reached 100+ customers, 40 reached 1,000+ customers, 2 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 2023, 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 | 2023 | 5.8 hrs | 1.16 | 1.6 hrs | 0.84 |
| NSTAR Electric Company | 2023 | 3.2 hrs | 0.88 | 76 min | 0.67 |
| City of Taunton | 2023 | 87 min | 3.51 | 87 min | 3.51 |
| Town of Mansfield - (MA) | 2023 | 53 min | 0.53 | 10 min | 0.11 |
| Town of North Attleborough - (MA) | 2023 | 45 min | 0.31 | 45 min | 0.31 |
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 2023; 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, 2023, 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/2023/massachusetts/bristol-county