County annual report · FIPS 25021
2023 Norfolk County, MA Power Outage Report
In 2023, customers in Norfolk County, MA went without power for an average of 5.6 hours, a total of 1.8M customer-hours (Massachusetts average 5.1 hours). That ranks 8th worst of 14 Massachusetts counties and 1354th 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 Norfolk 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 17, 2023 22:45 | December 23, 2023 07:45 | 5d 9h | 55,159 | 1.4M |
| 2 | November 3, 2023 13:00 | November 3, 2023 19:30 | 6h 30m | 10,685 | 20K |
| 3 | February 3, 2023 13:00 | February 5, 2023 23:00 | 2d 10h | 8,099 | 26K |
| 4 | February 7, 2023 23:15 | February 8, 2023 09:15 | 10h | 5,243 | 8,097 |
| 5 | September 9, 2023 10:30 | September 10, 2023 22:45 | 1d 12h | 4,067 | 7,423 |
| 6 | June 15, 2023 08:15 | June 15, 2023 20:00 | 11h 45m | 3,739 | 2,285 |
| 7 | May 6, 2023 21:00 | May 7, 2023 05:15 | 8h 15m | 3,666 | 3,815 |
| 8 | May 29, 2023 06:30 | May 29, 2023 07:30 | 1h | 3,348 | 2,511 |
| 9 | August 18, 2023 13:30 | August 19, 2023 01:15 | 11h 45m | 3,265 | 3,919 |
| 10 | October 21, 2023 20:15 | October 22, 2023 03:15 | 7h | 3,084 | 4,605 |
Outage episodes by size in 2023: 210 reached 100+ customers, 58 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 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 Norwood - (MA) | 2023 | 63 min | 0.96 | 46 min | 0.76 |
| Town of Braintree - (MA) | 2023 | 6 min | 0.10 | 6 min | 0.10 |
| Massachusetts Bay Trans Authority | - | - | - | - | - |
| 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 n/a of Massachusetts's customers in 2023; 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, 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/norfolk-county