County annual report · FIPS 30027
2022 Fergus County, MT Power Outage Report
In 2022, customers in Fergus County, MT went without power for an average of 4.7 hours, a total of 25K customer-hours (Montana average 3.5 hours). That ranks 24th worst of 50 Montana counties and 1494th 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 Fergus 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 | October 26, 2022 15:15 | October 26, 2022 18:00 | 2h 45m | 4,101 | 8,536 |
| 2 | May 24, 2022 04:15 | May 24, 2022 06:15 | 2h | 1,628 | 3,256 |
| 3 | October 23, 2022 07:00 | October 23, 2022 17:30 | 10h 30m | 1,464 | 9,150 |
| 4 | March 22, 2022 22:15 | March 23, 2022 02:00 | 3h 45m | 338 | 1,268 |
| 5 | November 5, 2022 14:15 | November 5, 2022 23:00 | 8h 45m | 160 | 589 |
| 6 | April 23, 2022 06:45 | April 23, 2022 10:30 | 3h 45m | 159 | 518 |
| 7 | October 23, 2022 23:30 | October 24, 2022 03:15 | 3h 45m | 159 | 557 |
| 8 | May 1, 2022 20:15 | May 1, 2022 22:30 | 2h 15m | 155 | 347 |
| 9 | June 15, 2022 18:15 | June 15, 2022 23:00 | 4h 45m | 41 | 175 |
| 10 | July 3, 2022 20:30 | July 3, 2022 22:45 | 2h 15m | 38 | 67 |
Outage episodes by size in 2022: 8 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 Fergus 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 |
| NorthWestern Energy | - | - | - | - | - |
| Fergus Electric Coop, Inc | - | - | - | - | - |
| Hill County 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 ÷ 5,384 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. Fergus County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Fergus 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/fergus-county