County annual report · FIPS 25021
2018 Norfolk County, MA Power Outage Report
In 2018, customers in Norfolk County, MA went without power for an average of 11.3 hours, a total of 3.7M customer-hours (Massachusetts average 12.6 hours). That ranks 9th worst of 14 Massachusetts counties and 487th of 2,798 nationally.
Compared with MA, the US and 2017
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Norfolk County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 2, 2018 10:00 | March 6, 2018 01:00 | 3d 15h | 68,310 | 2.5M |
| 2 | March 6, 2018 03:15 | March 19, 2018 09:15 | 13d 6h | 32,225 | 787K |
| 3 | November 3, 2018 10:15 | November 6, 2018 04:30 | 2d 18h | 5,320 | 27K |
| 4 | January 23, 2018 16:15 | January 24, 2018 09:30 | 17h 15m | 5,260 | 14K |
| 5 | December 18, 2018 06:30 | December 19, 2018 09:30 | 1d 3h | 5,130 | 8,462 |
| 6 | October 16, 2018 07:15 | October 16, 2018 22:30 | 15h 15m | 4,090 | 11K |
| 7 | May 12, 2018 16:00 | May 12, 2018 19:45 | 3h 45m | 4,068 | 1,022 |
| 8 | February 5, 2018 07:15 | February 6, 2018 03:15 | 20h | 3,683 | 5,006 |
| 9 | August 8, 2018 17:30 | August 9, 2018 05:30 | 12h | 3,641 | 6,845 |
| 10 | June 24, 2018 19:30 | June 26, 2018 01:30 | 1d 6h | 3,465 | 43K |
Outage episodes by size in 2018: 225 reached 100+ customers, 53 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 Norfolk County reported on EIA Form 861 for 2018, 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 2018; 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, 2018, 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/2018/massachusetts/norfolk-county