County annual report · FIPS 50001
2021 Addison County, VT Power Outage Report
In 2021, customers in Addison County, VT went without power for an average of 4.9 hours, a total of 84K customer-hours (Vermont average 4.3 hours). That ranks 5th worst of 14 Vermont counties and 1358th of 2,974 nationally.
Compared with VT, the US and 2020
Coverage line is EAGLE-I's share of Vermont customers tracked each year.
Biggest outages in Addison County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 26, 2021 18:30 | May 27, 2021 09:45 | 15h 15m | 3,969 | 25K |
| 2 | June 14, 2021 09:15 | June 14, 2021 14:00 | 4h 45m | 1,863 | 1,433 |
| 3 | November 12, 2021 10:15 | November 13, 2021 03:30 | 17h 15m | 1,686 | 5,883 |
| 4 | May 23, 2021 17:00 | May 24, 2021 01:00 | 8h | 1,625 | 6,185 |
| 5 | July 20, 2021 23:15 | July 21, 2021 17:00 | 17h 45m | 1,536 | 3,832 |
| 6 | July 25, 2021 08:15 | July 25, 2021 14:30 | 6h 15m | 1,293 | 2,211 |
| 7 | August 7, 2021 02:30 | August 7, 2021 07:00 | 4h 30m | 1,235 | 952 |
| 8 | October 25, 2021 15:00 | October 25, 2021 16:30 | 1h 30m | 1,179 | 667 |
| 9 | July 2, 2021 16:15 | July 2, 2021 17:30 | 1h 15m | 1,069 | 803 |
| 10 | October 17, 2021 17:45 | October 18, 2021 02:00 | 8h 15m | 943 | 1,940 |
Outage episodes by size in 2021: 55 reached 100+ customers, 9 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 Addison County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Vermont Electric Cooperative, Inc | 2021 | 3.6 hrs | 1.91 | 3.6 hrs | 1.91 |
| Green Mountain Power Corp | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 100% of Vermont's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 17,215 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. Addison County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Addison County, VT annual power outage report, 2021, 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/2021/vermont/addison-county