County annual report · FIPS 25025
2024 Suffolk County, MA Power Outage Report
In 2024, customers in Suffolk County, MA went without power for an average of 0.6 hours, a total of 522K customer-hours (Massachusetts average 1.9 hours). That ranks 14th worst of 14 Massachusetts counties and 2833rd of 2,990 nationally.
Compared with MA, the US and 2023
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Suffolk County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 9, 2024 13:15 | August 10, 2024 02:45 | 13h 30m | 10,679 | 16K |
| 2 | June 17, 2024 06:15 | June 23, 2024 03:15 | 5d 21h | 8,696 | 47K |
| 3 | July 30, 2024 14:45 | August 1, 2024 09:15 | 1d 18h | 5,151 | 33K |
| 4 | December 4, 2024 15:00 | December 5, 2024 05:15 | 14h 15m | 4,642 | 2,390 |
| 5 | January 18, 2024 16:15 | January 20, 2024 06:45 | 1d 14h | 4,396 | 11K |
| 6 | July 16, 2024 20:00 | July 17, 2024 17:00 | 21h | 4,238 | 19K |
| 7 | December 11, 2024 15:00 | December 12, 2024 05:00 | 14h | 3,554 | 6,772 |
| 8 | April 20, 2024 00:45 | April 20, 2024 03:15 | 2h 30m | 3,529 | 1,767 |
| 9 | April 12, 2024 05:45 | April 13, 2024 02:30 | 20h 45m | 3,342 | 5,326 |
| 10 | August 2, 2024 20:15 | August 3, 2024 00:30 | 4h 15m | 3,336 | 2,877 |
Outage episodes by size in 2024: 248 reached 100+ customers, 40 reached 1,000+ customers, 1 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 2024, 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 |
| 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 2024; 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, 2024, 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/2024/massachusetts/suffolk-county