County annual report · FIPS 25019
2020 Nantucket County, MA Power Outage Report
In 2020, customers in Nantucket County, MA went without power for an average of 21.2 hours, a total of 14K customer-hours (Massachusetts average 5.3 hours). That ranks 1st worst of 14 Massachusetts counties and 404th 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 Nantucket 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 | April 4, 2020 07:00 | April 4, 2020 08:45 | 1h 45m | 2,798 | 2,837 |
| 2 | June 9, 2020 16:00 | June 9, 2020 16:15 | 15m | 2,678 | 670 |
| 3 | March 7, 2020 06:45 | March 7, 2020 08:30 | 1h 45m | 1,605 | 2,808 |
| 4 | March 8, 2020 23:30 | March 9, 2020 01:30 | 2h | 922 | 1,842 |
| 5 | March 7, 2020 09:30 | March 7, 2020 14:00 | 4h 30m | 579 | 193 |
| 6 | March 18, 2020 09:45 | March 18, 2020 11:45 | 2h | 283 | 424 |
| 7 | September 30, 2020 13:15 | September 30, 2020 16:45 | 3h 30m | 203 | 533 |
| 8 | August 5, 2020 18:00 | August 6, 2020 01:45 | 7h 45m | 145 | 385 |
| 9 | August 16, 2020 18:30 | August 17, 2020 00:15 | 5h 45m | 145 | 251 |
| 10 | August 18, 2020 13:15 | August 18, 2020 16:30 | 3h 15m | 123 | 345 |
Outage episodes by size in 2020: 12 reached 100+ customers, 3 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 Nantucket 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 |
| Nantucket Electric Co | 2014 | 2.8 hrs | 1.50 | 63 min | 0.73 |
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 ÷ 680 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. Nantucket County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Nantucket 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/nantucket-county