County annual report · FIPS 25017
2016 Middlesex County, MA Power Outage Report
In 2016, customers in Middlesex County, MA went without power for an average of 4.1 hours, a total of 1.8M customer-hours (Massachusetts average 2.3 hours). That ranks 3rd worst of 14 Massachusetts counties and 769th of 2,391 nationally.
Compared with MA, the US and 2015
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Middlesex County, 2016
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 5, 2016 10:15 | February 13, 2016 10:00 | 7d 23h | 32,359 | 561K |
| 2 | March 28, 2016 17:30 | March 31, 2016 02:45 | 2d 9h | 12,805 | 32K |
| 3 | February 24, 2016 08:30 | February 28, 2016 02:15 | 3d 17h | 11,291 | 90K |
| 4 | July 22, 2016 10:30 | July 28, 2016 06:45 | 5d 20h | 10,367 | 142K |
| 5 | February 3, 2016 10:15 | February 5, 2016 06:30 | 1d 20h | 8,348 | 29K |
| 6 | February 15, 2016 12:15 | February 18, 2016 12:30 | 3d | 8,073 | 42K |
| 7 | April 11, 2016 10:45 | April 12, 2016 01:00 | 14h 15m | 7,695 | 7,546 |
| 8 | April 3, 2016 09:15 | April 5, 2016 06:15 | 1d 21h | 7,506 | 28K |
| 9 | September 8, 2016 19:15 | September 12, 2016 23:15 | 4d 4h | 7,496 | 47K |
| 10 | September 15, 2016 06:15 | September 16, 2016 07:45 | 1d 1h | 7,203 | 20K |
Outage episodes by size in 2016: 236 reached 100+ customers, 88 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 2016, 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 | 2016 | 2.9 hrs | 1.08 | 1.6 hrs | 0.91 |
| Unitil Energy Systems | 2016 | 2.7 hrs | 1.17 | 1.7 hrs | 0.98 |
| Fitchburg Gas & Elec Light Co | 2016 | 88 min | 1.45 | 88 min | 1.45 |
| Town of Reading - (MA) | 2016 | 53 min | 0.31 | 23 min | - |
| Town of Belmont - (MA) | 2016 | 21 min | 0.21 | 21 min | 0.21 |
| 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 n/a of Massachusetts's customers in 2016; 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, 2016, 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/2016/massachusetts/middlesex-county