County annual report · FIPS 30095
2024 Stillwater County, MT Power Outage Report
In 2024, customers in Stillwater County, MT went without power for an average of 0.6 hours, a total of 3,448 customer-hours (Montana average 8.5 hours). That ranks 48th worst of 51 Montana counties and 2814th of 2,990 nationally.
Compared with MT, the US and 2023
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Stillwater County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 27, 2024 19:15 | June 28, 2024 04:00 | 8h 45m | 551 | 1,836 |
| 2 | September 6, 2024 18:45 | September 6, 2024 23:00 | 4h 15m | 87 | 324 |
| 3 | October 17, 2024 13:15 | October 17, 2024 16:00 | 2h 45m | 55 | 151 |
| 4 | March 2, 2024 05:00 | March 2, 2024 07:45 | 2h 45m | 49 | 135 |
| 5 | June 28, 2024 17:30 | June 28, 2024 21:00 | 3h 30m | 46 | 60 |
| 6 | August 7, 2024 01:45 | August 7, 2024 09:00 | 7h 15m | 44 | 308 |
| 7 | July 16, 2024 18:45 | July 16, 2024 22:00 | 3h 15m | 29 | 94 |
| 8 | March 15, 2024 14:15 | March 15, 2024 22:15 | 8h | 18 | 87 |
| 9 | December 8, 2024 18:45 | December 8, 2024 22:00 | 3h 15m | 16 | 52 |
| 10 | September 3, 2024 21:00 | September 3, 2024 23:30 | 2h 30m | 15 | 26 |
Outage episodes by size in 2024: 1 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 Stillwater County reported on EIA Form 861 for 2024, 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) | 2024 | 3.9 hrs | 1.30 | 2.0 hrs | 0.95 |
| 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 n/a of Montana's customers in 2024; 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, 2024, 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/2024/montana/stillwater-county