County annual report · FIPS 25021
2022 Norfolk County, MA Power Outage Report
In 2022, customers in Norfolk County, MA went without power for an average of 1.7 hours, a total of 549K customer-hours (Massachusetts average 3.3 hours). That ranks 11th worst of 14 Massachusetts counties and 2415th of 2,976 nationally.
Compared with MA, the US and 2021
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Norfolk County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 30, 2022 15:15 | December 2, 2022 06:45 | 1d 15h | 35,427 | 95K |
| 2 | July 26, 2022 12:00 | July 26, 2022 19:45 | 7h 45m | 11,039 | 15K |
| 3 | December 23, 2022 09:15 | December 25, 2022 07:15 | 1d 22h | 5,504 | 58K |
| 4 | February 18, 2022 03:15 | February 19, 2022 02:45 | 23h 30m | 5,119 | 19K |
| 5 | August 26, 2022 16:45 | August 27, 2022 23:15 | 1d 6h | 4,244 | 15K |
| 6 | May 26, 2022 10:45 | May 30, 2022 02:45 | 3d 16h | 3,668 | 8,437 |
| 7 | July 19, 2022 14:30 | July 20, 2022 05:00 | 14h 30m | 3,534 | 1,400 |
| 8 | May 19, 2022 09:45 | May 19, 2022 19:15 | 9h 30m | 3,409 | 3,257 |
| 9 | July 24, 2022 15:15 | July 25, 2022 02:30 | 11h 15m | 3,396 | 1,197 |
| 10 | July 14, 2022 19:15 | July 14, 2022 22:00 | 2h 45m | 3,274 | 2,847 |
Outage episodes by size in 2022: 225 reached 100+ customers, 48 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 2022, 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 | 2022 | 2.4 hrs | 1.16 | 1.8 hrs | 1.05 |
| NSTAR Electric Company | 2022 | 3.3 hrs | 1.03 | 69 min | 0.75 |
| City of Norwood - (MA) | 2022 | 49 min | 0.62 | 26 min | 0.43 |
| Town of Braintree - (MA) | 2022 | 2 min | 0.03 | 2 min | 0.03 |
| 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 99% of Massachusetts's customers in 2022; 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, 2022, 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/2022/massachusetts/norfolk-county