County annual report · FIPS 30095
2022 Stillwater County, MT Power Outage Report
In 2022, customers in Stillwater County, MT went without power for an average of 2.6 hours, a total of 14K customer-hours (Montana average 3.5 hours). That ranks 32nd worst of 50 Montana counties and 2076th 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 Stillwater 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 | August 28, 2022 17:00 | August 28, 2022 20:15 | 3h 15m | 1,338 | 2,026 |
| 2 | May 13, 2022 21:15 | May 14, 2022 01:45 | 4h 30m | 1,336 | 4,352 |
| 3 | March 10, 2022 01:45 | March 10, 2022 10:00 | 8h 15m | 1,333 | 2,709 |
| 4 | February 18, 2022 08:00 | February 18, 2022 09:15 | 1h 15m | 494 | 618 |
| 5 | April 22, 2022 23:45 | April 23, 2022 05:00 | 5h 15m | 464 | 1,808 |
| 6 | December 5, 2022 17:00 | December 5, 2022 19:30 | 2h 30m | 464 | 584 |
| 7 | April 5, 2022 04:30 | April 5, 2022 08:45 | 4h 15m | 143 | 606 |
| 8 | November 28, 2022 00:30 | November 28, 2022 03:15 | 2h 45m | 75 | 204 |
| 9 | July 15, 2022 20:30 | July 15, 2022 23:00 | 2h 30m | 57 | 102 |
| 10 | November 5, 2022 18:00 | November 6, 2022 01:45 | 7h 45m | 55 | 156 |
Outage episodes by size in 2022: 7 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 Stillwater 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 | - | - | - | - | - |
| Yellowstone Valley Elec Co-op | - | - | - | - | - |
| Beartooth 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 ÷ 5,383 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. Stillwater County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Stillwater 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/stillwater-county