County annual report · FIPS 49043
2025 Summit County, UT Power Outage Report
In 2025, customers in Summit County, UT went without power for an average of 14.9 hours, a total of 271K customer-hours (Utah average 3.1 hours). That ranks 4th worst of 26 Utah counties and 506th 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 Summit 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 | July 9, 2025 21:00 | July 10, 2025 04:45 | 7h 45m | 5,659 | 8,582 |
| 2 | July 19, 2025 02:30 | July 19, 2025 06:30 | 4h | 4,650 | 7,826 |
| 3 | October 4, 2025 12:45 | October 4, 2025 23:15 | 10h 30m | 3,644 | 6,194 |
| 4 | July 11, 2025 04:30 | July 11, 2025 08:45 | 4h 15m | 2,821 | 11K |
| 5 | July 4, 2025 22:30 | July 5, 2025 10:45 | 12h 15m | 2,820 | 2,656 |
| 6 | July 6, 2025 10:30 | July 6, 2025 14:30 | 4h | 2,819 | 6,395 |
| 7 | January 19, 2025 06:45 | January 20, 2025 03:30 | 20h 45m | 2,801 | 15K |
| 8 | July 1, 2025 15:15 | July 2, 2025 10:45 | 19h 30m | 2,748 | 3,234 |
| 9 | July 7, 2025 03:15 | July 7, 2025 04:45 | 1h 30m | 2,747 | 2,061 |
| 10 | July 22, 2025 13:45 | July 22, 2025 21:15 | 7h 30m | 2,747 | 1,435 |
Outage episodes by size in 2025: 113 reached 100+ customers, 37 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 Summit 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 |
| Bridger Valley Elec Assn, 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 Utah's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 18,106 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. Summit County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Summit 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/summit-county