County annual report · FIPS 50007
2021 Chittenden County, VT Power Outage Report
In 2021, customers in Chittenden County, VT went without power for an average of 1.6 hours, a total of 183K customer-hours (Vermont average 4.3 hours). That ranks 13th worst of 14 Vermont counties and 2402nd 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 Chittenden 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 | August 21, 2021 17:45 | August 21, 2021 21:45 | 4h | 11,119 | 9,853 |
| 2 | July 20, 2021 23:00 | July 21, 2021 22:15 | 23h 15m | 8,162 | 23K |
| 3 | December 11, 2021 20:45 | December 12, 2021 16:45 | 20h | 4,570 | 19K |
| 4 | October 27, 2021 05:30 | October 27, 2021 07:45 | 2h 15m | 4,468 | 4,769 |
| 5 | September 1, 2021 14:00 | September 1, 2021 18:15 | 4h 15m | 4,144 | 3,532 |
| 6 | August 5, 2021 21:15 | August 6, 2021 00:00 | 2h 45m | 3,944 | 10K |
| 7 | November 12, 2021 11:00 | November 13, 2021 01:45 | 14h 45m | 3,091 | 7,209 |
| 8 | June 21, 2021 11:15 | June 21, 2021 23:45 | 12h 30m | 2,814 | 3,245 |
| 9 | October 28, 2021 22:45 | October 29, 2021 00:45 | 2h | 2,759 | 4,930 |
| 10 | February 27, 2021 21:30 | February 28, 2021 03:45 | 6h 15m | 2,393 | 10K |
Outage episodes by size in 2021: 79 reached 100+ customers, 21 reached 1,000+ customers, 1 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 Chittenden 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 | - | - | - | - | - |
| City of Burlington Electric - (VT) | - | - | - | - | - |
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 ÷ 113,089 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. Chittenden County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Chittenden 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/chittenden-county