County annual report · FIPS 25021
2017 Norfolk County, MA Power Outage Report
In 2017, customers in Norfolk County, MA went without power for an average of 2.7 hours, a total of 893K customer-hours (Massachusetts average 4.7 hours). That ranks 9th worst of 14 Massachusetts counties and 1405th of 2,786 nationally.
Compared with MA, the US and 2016
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Norfolk County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 29, 2017 14:15 | November 3, 2017 08:15 | 4d 18h | 21,309 | 487K |
| 2 | March 30, 2017 12:00 | March 30, 2017 15:00 | 3h | 13,557 | 6,164 |
| 3 | November 13, 2017 13:00 | November 14, 2017 05:30 | 16h 30m | 9,418 | 5,316 |
| 4 | June 12, 2017 16:30 | June 13, 2017 17:15 | 1d | 8,796 | 16K |
| 5 | November 13, 2017 00:30 | November 13, 2017 08:15 | 7h 45m | 5,464 | 23K |
| 6 | October 15, 2017 02:30 | October 15, 2017 06:00 | 3h 30m | 4,243 | 3,641 |
| 7 | November 9, 2017 13:15 | November 10, 2017 16:30 | 1d 3h | 3,767 | 8,351 |
| 8 | May 12, 2017 19:00 | May 14, 2017 02:15 | 1d 7h | 3,731 | 13K |
| 9 | January 24, 2017 00:15 | January 25, 2017 03:00 | 1d 2h | 3,586 | 20K |
| 10 | November 3, 2017 12:00 | November 5, 2017 04:00 | 1d 16h | 3,578 | 7,455 |
Outage episodes by size in 2017: 221 reached 100+ customers, 58 reached 1,000+ customers, 2 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 Norfolk County reported on EIA Form 861 for 2017, 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 | 2017 | 3.4 hrs | 1.04 | 74 min | 0.07 |
| Massachusetts Bay Trans Authority | - | - | - | - | - |
| City of Norwood - (MA) | - | - | - | - | - |
| Town of Braintree - (MA) | - | - | - | - | - |
| Town of Wellesley - (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 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 326,357 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. Norfolk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Norfolk County, MA annual power outage report, 2017, 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/2017/massachusetts/norfolk-county