County annual report · FIPS 49045
2025 Tooele County, UT Power Outage Report
In 2025, customers in Tooele County, UT went without power for an average of 2.9 hours, a total of 83K customer-hours (Utah average 3.1 hours). That ranks 19th worst of 26 Utah counties and 2114th of 3,000 nationally.
Compared with UT, the US and 2024
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Tooele County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 13, 2025 23:00 | March 14, 2025 06:45 | 7h 45m | 5,645 | 1,422 |
| 2 | October 23, 2025 01:00 | October 23, 2025 21:15 | 20h 15m | 5,198 | 1,534 |
| 3 | July 18, 2025 00:00 | July 18, 2025 01:45 | 1h 45m | 2,936 | 1,046 |
| 4 | March 9, 2025 23:15 | March 10, 2025 05:45 | 6h 30m | 2,897 | 9,785 |
| 5 | June 21, 2025 02:30 | June 21, 2025 22:45 | 20h 15m | 2,649 | 4,687 |
| 6 | August 17, 2025 01:30 | August 17, 2025 13:45 | 12h 15m | 2,642 | 673 |
| 7 | June 19, 2025 23:30 | June 20, 2025 21:45 | 22h 15m | 2,633 | 4,019 |
| 8 | May 15, 2025 20:15 | May 16, 2025 00:15 | 4h | 2,208 | 2,210 |
| 9 | July 28, 2025 01:15 | July 28, 2025 22:15 | 21h | 2,126 | 5,385 |
| 10 | August 2, 2025 00:45 | August 2, 2025 13:30 | 12h 45m | 1,904 | 496 |
Outage episodes by size in 2025: 47 reached 100+ customers, 16 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 Tooele County reported on EIA Form 861 for 2025, 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 |
|---|---|---|---|---|---|
| PacifiCorp | 2024 | 4.6 hrs | 1.67 | 2.0 hrs | 1.11 |
| Mt Wheeler Power, Inc | - | - | - | - | - |
| Wells Rural Electric Co | - | - | - | - | - |
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 Utah's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 28,885 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. Tooele County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Tooele County, UT annual power outage report, 2025, 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/2025/utah/tooele-county