County annual report · FIPS 49035
2025 Salt Lake County, UT Power Outage Report
In 2025, customers in Salt Lake County, UT went without power for an average of 2.7 hours, a total of 1.3M customer-hours (Utah average 3.1 hours). That ranks 20th worst of 26 Utah counties and 2182nd 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 Salt Lake 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 | December 16, 2025 15:15 | December 17, 2025 10:30 | 19h 15m | 18,820 | 11K |
| 2 | November 7, 2025 15:15 | November 8, 2025 07:45 | 16h 30m | 18,520 | 16K |
| 3 | February 11, 2025 09:45 | February 11, 2025 10:45 | 1h | 13,914 | 5,700 |
| 4 | February 13, 2025 14:45 | February 15, 2025 03:45 | 1d 13h | 13,782 | 26K |
| 5 | May 10, 2025 13:15 | May 15, 2025 04:45 | 4d 15h | 13,259 | 70K |
| 6 | November 18, 2025 14:30 | November 19, 2025 11:30 | 21h | 10,174 | 17K |
| 7 | November 19, 2025 14:30 | November 20, 2025 10:45 | 20h 15m | 8,900 | 3,912 |
| 8 | June 18, 2025 12:15 | June 23, 2025 09:30 | 4d 21h | 7,397 | 46K |
| 9 | June 9, 2025 09:15 | June 11, 2025 11:00 | 2d 1h | 6,762 | 37K |
| 10 | April 15, 2025 10:45 | April 19, 2025 04:15 | 3d 17h | 6,340 | 19K |
Outage episodes by size in 2025: 224 reached 100+ customers, 89 reached 1,000+ customers, 6 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 Salt Lake 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| City of Murray - (UT) | - | - | - | - | - |
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 ÷ 494,047 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. Salt Lake County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Salt Lake 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/salt-lake-county