County annual report · FIPS 30041
2023 Hill County, MT Power Outage Report
In 2023, customers in Hill County, MT went without power for an average of 1.4 hours, a total of 11K customer-hours (Montana average 1.8 hours). That ranks 34th worst of 50 Montana counties and 2526th of 2,977 nationally.
Compared with MT, the US and 2022
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Hill County, 2023
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 5, 2023 02:15 | August 5, 2023 08:30 | 6h 15m | 1,717 | 3,140 |
| 2 | June 24, 2023 23:15 | June 25, 2023 00:30 | 1h 15m | 885 | 945 |
| 3 | January 28, 2023 15:15 | January 28, 2023 18:30 | 3h 15m | 215 | 699 |
| 4 | January 30, 2023 17:45 | January 30, 2023 22:00 | 4h 15m | 215 | 272 |
| 5 | October 17, 2023 18:00 | October 17, 2023 20:45 | 2h 45m | 215 | 591 |
| 6 | October 18, 2023 00:00 | October 18, 2023 02:00 | 2h | 215 | 430 |
| 7 | November 3, 2023 19:30 | November 3, 2023 22:30 | 3h | 215 | 645 |
| 8 | September 20, 2023 03:00 | September 20, 2023 04:45 | 1h 45m | 209 | 366 |
| 9 | July 25, 2023 00:45 | July 25, 2023 03:00 | 2h 15m | 178 | 315 |
| 10 | August 22, 2023 16:30 | August 22, 2023 23:00 | 6h 30m | 177 | 844 |
Outage episodes by size in 2023: 13 reached 100+ customers, 1 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 Hill County reported on EIA Form 861 for 2023, 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) | 2023 | 1.7 hrs | 0.93 | 1.7 hrs | 0.93 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| 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 n/a of Montana's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,876 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. Hill County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Hill County, MT annual power outage report, 2023, 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/2023/montana/hill-county