County annual report · FIPS 25021
2015 Norfolk County, MA Power Outage Report
In 2015, customers in Norfolk County, MA went without power for an average of 1.2 hours, a total of 378K customer-hours (Massachusetts average 1.5 hours). That ranks 8th worst of 14 Massachusetts counties and 1677th 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 Norfolk 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 | September 22, 2015 12:30 | September 22, 2015 23:45 | 11h 15m | 8,092 | 7,501 |
| 2 | August 4, 2015 18:30 | August 5, 2015 03:15 | 8h 45m | 4,959 | 9,760 |
| 3 | September 30, 2015 05:00 | October 1, 2015 03:00 | 22h | 4,612 | 15K |
| 4 | February 9, 2015 16:45 | February 9, 2015 18:00 | 1h 15m | 3,711 | 2,562 |
| 5 | June 12, 2015 14:15 | June 13, 2015 04:45 | 14h 30m | 3,428 | 1,904 |
| 6 | August 11, 2015 10:15 | August 12, 2015 08:15 | 22h | 3,347 | 5,311 |
| 7 | September 7, 2015 11:00 | September 7, 2015 13:45 | 2h 45m | 3,213 | 7,213 |
| 8 | October 28, 2015 13:30 | October 30, 2015 08:30 | 1d 19h | 3,164 | 9,024 |
| 9 | July 7, 2015 10:15 | July 8, 2015 04:00 | 17h 45m | 3,062 | 2,353 |
| 10 | September 21, 2015 01:15 | September 21, 2015 05:45 | 4h 30m | 3,042 | 1,316 |
Outage episodes by size in 2015: 176 reached 100+ customers, 50 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 Norfolk 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 | - | - | - | - | - |
| 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 2015; 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, 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/norfolk-county