County annual report · FIPS 25025
2023 Suffolk County, MA Power Outage Report
In 2023, customers in Suffolk County, MA went without power for an average of 0.7 hours, a total of 707K customer-hours (Massachusetts average 5.1 hours). That ranks 14th worst of 14 Massachusetts counties and 2754th 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 Suffolk 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 | November 3, 2023 13:15 | November 4, 2023 06:15 | 17h | 15,082 | 26K |
| 2 | December 23, 2023 02:45 | December 23, 2023 06:30 | 3h 45m | 13,056 | 17K |
| 3 | December 18, 2023 11:00 | December 22, 2023 06:45 | 3d 19h | 12,487 | 149K |
| 4 | July 20, 2023 12:45 | July 21, 2023 00:30 | 11h 45m | 8,775 | 19K |
| 5 | July 7, 2023 11:00 | July 7, 2023 20:30 | 9h 30m | 6,510 | 6,575 |
| 6 | September 26, 2023 09:45 | September 27, 2023 07:00 | 21h 15m | 4,744 | 7,197 |
| 7 | May 27, 2023 01:00 | May 27, 2023 03:15 | 2h 15m | 4,188 | 3,760 |
| 8 | April 17, 2023 12:00 | April 20, 2023 18:00 | 3d 6h | 4,139 | 18K |
| 9 | October 22, 2023 00:45 | October 22, 2023 03:15 | 2h 30m | 4,105 | 5,123 |
| 10 | July 12, 2023 21:30 | July 13, 2023 20:00 | 22h 30m | 3,875 | 6,272 |
Outage episodes by size in 2023: 267 reached 100+ customers, 48 reached 1,000+ customers, 3 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 Suffolk 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 |
| Massachusetts Bay Trans Authority | - | - | - | - | - |
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 ÷ 947,211 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. Suffolk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Suffolk 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/suffolk-county