County annual report · FIPS 25005
2020 Bristol County, MA Power Outage Report
In 2020, customers in Bristol County, MA went without power for an average of 4.1 hours, a total of 1.2M customer-hours (Massachusetts average 5.3 hours). That ranks 11th worst of 14 Massachusetts counties and 1593rd of 3,019 nationally.
Compared with MA, the US and 2019
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Bristol County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 4, 2020 11:30 | August 7, 2020 02:30 | 2d 15h | 28,131 | 308K |
| 2 | October 7, 2020 22:30 | October 10, 2020 22:00 | 2d 23h | 23,577 | 137K |
| 3 | April 13, 2020 18:15 | April 16, 2020 00:30 | 2d 6h | 17,163 | 214K |
| 4 | November 30, 2020 17:30 | December 2, 2020 02:00 | 1d 8h | 16,046 | 96K |
| 5 | September 30, 2020 07:45 | October 1, 2020 22:15 | 1d 14h | 15,337 | 114K |
| 6 | February 7, 2020 17:00 | February 10, 2020 01:15 | 2d 8h | 12,116 | 105K |
| 7 | March 7, 2020 01:30 | March 7, 2020 19:00 | 17h 30m | 4,550 | 15K |
| 8 | July 27, 2020 10:30 | July 29, 2020 06:45 | 1d 20h | 3,640 | 20K |
| 9 | October 17, 2020 08:30 | October 17, 2020 20:30 | 12h | 3,450 | 1,947 |
| 10 | January 19, 2020 15:30 | January 19, 2020 22:45 | 7h 15m | 2,907 | 6,414 |
Outage episodes by size in 2020: 174 reached 100+ customers, 36 reached 1,000+ customers, 6 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 2020, 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 | 2014 | 2.4 hrs | 1.12 | 1.6 hrs | 0.96 |
| NSTAR Electric Company | 2020 | 3.9 hrs | 1.14 | 65 min | 0.71 |
| City of Taunton | 2020 | 84 min | 4.21 | 84 min | 4.21 |
| Town of Mansfield - (MA) | 2020 | 9 min | 0.07 | 5 min | 0.05 |
| Town of North Attleborough - (MA) | 2020 | 78 min | 0.78 | 30 min | 0.53 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 94% of Massachusetts's customers in 2020; 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, 2020, 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/2020/massachusetts/bristol-county