County annual report · FIPS 25021
2019 Norfolk County, MA Power Outage Report
In 2019, customers in Norfolk County, MA went without power for an average of 1.5 hours, a total of 495K customer-hours (Massachusetts average 3.0 hours). That ranks 12th worst of 14 Massachusetts counties and 2276th of 2,945 nationally.
Compared with MA, the US and 2018
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Norfolk County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 17, 2019 03:30 | October 21, 2019 00:45 | 3d 21h | 14,721 | 201K |
| 2 | February 25, 2019 15:00 | February 28, 2019 03:15 | 2d 12h | 7,720 | 63K |
| 3 | March 10, 2019 10:45 | March 10, 2019 14:15 | 3h 30m | 4,921 | 4,815 |
| 4 | June 25, 2019 10:45 | June 25, 2019 13:30 | 2h 45m | 4,180 | 4,176 |
| 5 | March 2, 2019 11:30 | March 2, 2019 22:45 | 11h 15m | 3,818 | 1,706 |
| 6 | January 17, 2019 14:15 | January 18, 2019 10:15 | 20h | 3,380 | 4,706 |
| 7 | March 8, 2019 16:30 | March 8, 2019 19:45 | 3h 15m | 3,369 | 2,536 |
| 8 | January 8, 2019 21:30 | January 9, 2019 05:15 | 7h 45m | 3,341 | 2,291 |
| 9 | March 29, 2019 12:30 | March 29, 2019 16:00 | 3h 30m | 3,263 | 2,516 |
| 10 | December 7, 2019 01:00 | December 7, 2019 07:30 | 6h 30m | 3,250 | 2,676 |
Outage episodes by size in 2019: 152 reached 100+ customers, 43 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 Norfolk County reported on EIA Form 861 for 2019, 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 | 2018 | 16.2 hrs | 1.68 | 85 min | 0.83 |
| Town of Braintree - (MA) | 2018 | 13 min | 0.14 | 5 min | 0.07 |
| Massachusetts Bay Trans Authority | - | - | - | - | - |
| City of Norwood - (MA) | - | - | - | - | - |
| Town of Wellesley - (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 89% of Massachusetts's customers in 2019; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 326,357 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. Norfolk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Norfolk County, MA annual power outage report, 2019, 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/2019/massachusetts/norfolk-county