County annual report · FIPS 25025
2015 Suffolk County, MA Power Outage Report
In 2015, customers in Suffolk County, MA went without power for an average of 0.7 hours, a total of 652K customer-hours (Massachusetts average 1.5 hours). That ranks 14th worst of 14 Massachusetts counties and 1968th of 2,484 nationally.
Compared with MA, the US
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Suffolk County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 6, 2015 00:00 | July 7, 2015 01:45 | 1d 1h | 10,428 | 22K |
| 2 | August 6, 2015 12:15 | August 9, 2015 02:00 | 2d 13h | 7,290 | 14K |
| 3 | August 15, 2015 05:30 | August 18, 2015 05:15 | 2d 23h | 6,492 | 22K |
| 4 | July 8, 2015 12:15 | July 9, 2015 03:00 | 14h 45m | 5,884 | 6,544 |
| 5 | August 2, 2015 21:15 | August 3, 2015 09:45 | 12h 30m | 5,128 | 2,825 |
| 6 | December 17, 2015 03:45 | December 18, 2015 13:00 | 1d 9h | 4,573 | 9,294 |
| 7 | July 3, 2015 04:30 | July 3, 2015 09:30 | 5h | 4,330 | 6,224 |
| 8 | August 4, 2015 18:30 | August 5, 2015 03:15 | 8h 45m | 4,306 | 11K |
| 9 | September 9, 2015 12:00 | September 11, 2015 12:30 | 2d | 3,834 | 35K |
| 10 | December 20, 2015 18:30 | December 21, 2015 00:15 | 5h 45m | 3,801 | 4,042 |
Outage episodes by size in 2015: 157 reached 100+ customers, 50 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 2015, 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 | 2014 | 2.4 hrs | 1.12 | 1.6 hrs | 0.96 |
| NSTAR Electric Company | 2015 | 1.6 hrs | 0.83 | 75 min | 0.76 |
| 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 2015; 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, 2015, 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/2015/massachusetts/suffolk-county