County annual report · FIPS 25021
2025 Norfolk County, MA Power Outage Report
In 2025, customers in Norfolk County, MA went without power for an average of 3.1 hours, a total of 1.0M customer-hours (Massachusetts average 2.8 hours). That ranks 7th worst of 14 Massachusetts counties and 2017th of 3,000 nationally.
Compared with MA, the US and 2024
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Norfolk County, 2025
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 19, 2025 18:15 | December 21, 2025 13:30 | 1d 19h | 29,004 | 286K |
| 2 | August 14, 2025 04:45 | August 14, 2025 13:15 | 8h 30m | 12,840 | 18K |
| 3 | August 30, 2025 00:15 | August 30, 2025 04:45 | 4h 30m | 9,101 | 5,431 |
| 4 | May 17, 2025 06:00 | May 17, 2025 07:00 | 1h | 8,542 | 3,422 |
| 5 | April 29, 2025 13:45 | April 30, 2025 05:45 | 16h | 7,516 | 5,873 |
| 6 | May 5, 2025 08:45 | May 5, 2025 19:45 | 11h | 6,541 | 11K |
| 7 | June 23, 2025 14:30 | June 27, 2025 21:00 | 4d 6h | 5,781 | 52K |
| 8 | April 26, 2025 17:30 | April 26, 2025 20:00 | 2h 30m | 5,567 | 1,421 |
| 9 | February 16, 2025 09:00 | February 19, 2025 06:15 | 2d 21h | 4,677 | 19K |
| 10 | October 17, 2025 12:45 | October 17, 2025 21:45 | 9h | 4,319 | 2,196 |
Outage episodes by size in 2025: 268 reached 100+ customers, 66 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 2025, 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 | 2024 | 2.2 hrs | 1.00 | 1.5 hrs | 0.84 |
| NSTAR Electric Company | 2024 | 81 min | 0.69 | 66 min | 0.64 |
| City of Norwood - (MA) | 2024 | 64 min | 0.85 | 25 min | 0.46 |
| Town of Braintree - (MA) | 2024 | 3 min | 0.04 | 3 min | 0.04 |
| 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 2025; 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, 2025, 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/2025/massachusetts/norfolk-county