County annual report · FIPS 25017
2022 Middlesex County, MA Power Outage Report
In 2022, customers in Middlesex County, MA went without power for an average of 2.8 hours, a total of 1.2M customer-hours (Massachusetts average 3.3 hours). That ranks 8th worst of 14 Massachusetts counties and 2023rd 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 Middlesex 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 | December 22, 2022 23:00 | December 27, 2022 04:30 | 4d 5h | 20,981 | 212K |
| 2 | August 5, 2022 15:15 | August 10, 2022 15:45 | 5d | 11,901 | 99K |
| 3 | May 22, 2022 14:30 | May 24, 2022 09:15 | 1d 18h | 11,568 | 16K |
| 4 | July 19, 2022 04:15 | July 23, 2022 04:45 | 4d | 11,341 | 66K |
| 5 | November 30, 2022 12:45 | December 3, 2022 10:45 | 2d 22h | 7,332 | 34K |
| 6 | June 13, 2022 07:30 | June 14, 2022 09:00 | 1d 1h | 6,510 | 4,596 |
| 7 | October 15, 2022 12:00 | October 18, 2022 08:15 | 2d 20h | 5,974 | 15K |
| 8 | September 9, 2022 12:00 | September 9, 2022 20:45 | 8h 45m | 5,522 | 7,025 |
| 9 | April 15, 2022 01:15 | April 15, 2022 03:00 | 1h 45m | 5,501 | 1,397 |
| 10 | October 24, 2022 12:00 | October 25, 2022 02:15 | 14h 15m | 5,252 | 2,793 |
Outage episodes by size in 2022: 320 reached 100+ customers, 105 reached 1,000+ customers, 4 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 Middlesex 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 |
| Unitil Energy Systems | 2022 | 4.6 hrs | 1.40 | 71 min | 0.88 |
| Fitchburg Gas & Elec Light Co | 2022 | 71 min | 1.10 | 71 min | 1.10 |
| Town of Reading - (MA) | 2022 | 62 min | 0.26 | 14 min | 0.15 |
| Town of Belmont - (MA) | 2018 | 57 min | 0.53 | 57 min | 0.53 |
| Massachusetts Bay Trans Authority | - | - | - | - | - |
| Town of Concord - (MA) | - | - | - | - | - |
| Town of Groton - (MA) | - | - | - | - | - |
| Town of Hudson - (MA) | - | - | - | - | - |
| Town of Littleton - (MA) | - | - | - | - | - |
| Town of Wakefield - (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 ÷ 434,426 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. Middlesex County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Middlesex 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/middlesex-county