County annual report · FIPS 30015
2022 Chouteau County, MT Power Outage Report
In 2022, customers in Chouteau County, MT went without power for an average of 10.3 hours, a total of 20K customer-hours (Montana average 3.5 hours). That ranks 7th worst of 50 Montana counties and 699th 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 Chouteau 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 | September 14, 2022 05:15 | September 14, 2022 06:30 | 1h 15m | 1,933 | 2,416 |
| 2 | November 5, 2022 16:45 | November 5, 2022 23:30 | 6h 45m | 1,149 | 3,226 |
| 3 | July 9, 2022 01:00 | July 9, 2022 10:15 | 9h 15m | 1,090 | 3,275 |
| 4 | July 19, 2022 13:45 | July 19, 2022 18:00 | 4h 15m | 709 | 1,073 |
| 5 | March 22, 2022 22:15 | March 23, 2022 01:00 | 2h 45m | 488 | 1,341 |
| 6 | April 18, 2022 16:15 | April 18, 2022 20:30 | 4h 15m | 484 | 2,057 |
| 7 | October 23, 2022 14:45 | October 24, 2022 06:15 | 15h 30m | 468 | 1,620 |
| 8 | February 7, 2022 23:00 | February 8, 2022 03:15 | 4h 15m | 464 | 1,055 |
| 9 | July 30, 2022 09:45 | July 30, 2022 13:45 | 4h | 464 | 1,856 |
| 10 | April 29, 2022 19:15 | April 30, 2022 02:30 | 7h 15m | 224 | 211 |
Outage episodes by size in 2022: 11 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 Chouteau 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 | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| Fergus Electric Coop, Inc | - | - | - | - | - |
| Sun River 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 ÷ 1,959 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. Chouteau County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Chouteau 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/chouteau-county