County annual report · FIPS 49035
2023 Salt Lake County, UT Power Outage Report
In 2023, customers in Salt Lake County, UT went without power for an average of 2.3 hours, a total of 1.2M customer-hours (Utah average 2.5 hours). That ranks 16th worst of 26 Utah counties and 2172nd of 2,977 nationally.
Compared with UT, the US and 2022
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Salt Lake 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 | March 10, 2023 07:45 | March 12, 2023 11:15 | 2d 3h | 15,397 | 80K |
| 2 | November 14, 2023 14:30 | November 15, 2023 12:00 | 21h 30m | 14,828 | 15K |
| 3 | July 30, 2023 09:45 | August 2, 2023 09:30 | 2d 23h | 11,634 | 41K |
| 4 | January 1, 2023 09:30 | January 7, 2023 07:30 | 5d 22h | 11,396 | 179K |
| 5 | September 7, 2023 14:00 | September 9, 2023 10:45 | 1d 20h | 6,808 | 12K |
| 6 | April 17, 2023 13:15 | April 20, 2023 04:15 | 2d 15h | 5,865 | 18K |
| 7 | October 30, 2023 14:15 | October 31, 2023 10:30 | 20h 15m | 5,212 | 1,919 |
| 8 | July 1, 2023 12:00 | July 5, 2023 04:45 | 3d 16h | 5,053 | 22K |
| 9 | March 28, 2023 13:30 | April 1, 2023 07:30 | 3d 18h | 5,047 | 22K |
| 10 | December 27, 2023 15:30 | December 28, 2023 03:00 | 11h 30m | 5,008 | 5,328 |
Outage episodes by size in 2023: 211 reached 100+ customers, 77 reached 1,000+ customers, 4 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 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 |
|---|---|---|---|---|---|
| PacifiCorp | 2023 | 8.2 hrs | 1.42 | 1.9 hrs | 0.99 |
| 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 2023; 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, 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/utah/salt-lake-county