County annual report · FIPS 30099
2022 Teton County, MT Power Outage Report
In 2022, customers in Teton County, MT went without power for an average of 5.5 hours, a total of 11K customer-hours (Montana average 3.5 hours). That ranks 22nd worst of 50 Montana counties and 1310th of 2,976 nationally.
Compared with MT, the US and 2021
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Teton County, 2022
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 12, 2022 16:30 | May 12, 2022 19:30 | 3h | 621 | 683 |
| 2 | August 25, 2022 06:30 | August 25, 2022 22:00 | 15h 30m | 578 | 1,126 |
| 3 | January 18, 2022 10:30 | January 18, 2022 12:15 | 1h 45m | 576 | 1,008 |
| 4 | June 7, 2022 11:00 | June 7, 2022 13:30 | 2h 30m | 508 | 703 |
| 5 | April 22, 2022 19:45 | April 22, 2022 21:45 | 2h | 484 | 968 |
| 6 | November 5, 2022 12:45 | November 5, 2022 22:00 | 9h 15m | 482 | 1,923 |
| 7 | July 17, 2022 22:15 | July 18, 2022 00:00 | 1h 45m | 338 | 511 |
| 8 | September 14, 2022 05:15 | September 14, 2022 06:30 | 1h 15m | 136 | 168 |
| 9 | June 18, 2022 21:30 | June 19, 2022 06:15 | 8h 45m | 130 | 527 |
| 10 | June 28, 2022 12:00 | June 28, 2022 14:45 | 2h 45m | 129 | 355 |
Outage episodes by size in 2022: 11 reached 100+ customers, 0 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 Teton County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| NorthWestern Energy LLC - (MT) | 2022 | 2.2 hrs | 1.14 | 2.0 hrs | 1.09 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Sun River Electric Coop, Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 76% of Montana's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,050 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. Teton County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Teton County, MT annual power outage report, 2022, 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/2022/montana/teton-county