County annual report · FIPS 25025
2020 Suffolk County, MA Power Outage Report
In 2020, customers in Suffolk County, MA went without power for an average of 0.7 hours, a total of 669K customer-hours (Massachusetts average 5.3 hours). That ranks 13th worst of 14 Massachusetts counties and 2769th of 3,019 nationally.
Compared with MA, the US and 2019
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Suffolk County, 2020
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 5, 2020 17:00 | December 6, 2020 14:30 | 21h 30m | 9,052 | 5,339 |
| 2 | April 13, 2020 13:15 | April 17, 2020 07:15 | 3d 18h | 4,998 | 58K |
| 3 | November 1, 2020 07:30 | November 1, 2020 10:00 | 2h 30m | 4,379 | 4,243 |
| 4 | August 16, 2020 11:00 | August 16, 2020 11:30 | 30m | 4,252 | 1,065 |
| 5 | October 6, 2020 03:15 | October 11, 2020 06:00 | 5d 2h | 4,175 | 38K |
| 6 | March 19, 2020 14:00 | March 19, 2020 19:00 | 5h | 3,864 | 11K |
| 7 | January 18, 2020 23:30 | January 19, 2020 04:15 | 4h 45m | 3,727 | 11K |
| 8 | January 21, 2020 15:30 | January 21, 2020 22:45 | 7h 15m | 3,586 | 4,474 |
| 9 | July 12, 2020 08:15 | July 12, 2020 08:30 | 15m | 3,379 | 845 |
| 10 | August 3, 2020 12:00 | August 9, 2020 00:45 | 5d 12h | 3,360 | 26K |
Outage episodes by size in 2020: 271 reached 100+ customers, 46 reached 1,000+ customers, 0 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 2020, 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 | 2020 | 3.9 hrs | 1.14 | 65 min | 0.71 |
| 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 94% of Massachusetts's customers in 2020; 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, 2020, 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/2020/massachusetts/suffolk-county