County annual report · FIPS 49035
2020 Salt Lake County, UT Power Outage Report
In 2020, customers in Salt Lake County, UT went without power for an average of 12.1 hours, a total of 6.0M customer-hours (Utah average 8.7 hours). That ranks 5th worst of 29 Utah counties and 660th of 3,019 nationally.
Compared with UT, the US and 2019
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Salt Lake County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 6, 2020 09:45 | September 27, 2020 10:45 | 21d 1h | 91,704 | 4.8M |
| 2 | March 18, 2020 11:30 | March 20, 2020 06:45 | 1d 19h | 58,592 | 218K |
| 3 | June 27, 2020 12:30 | June 30, 2020 11:00 | 2d 22h | 22,775 | 70K |
| 4 | December 29, 2020 05:15 | December 29, 2020 11:45 | 6h 30m | 12,246 | 3,432 |
| 5 | July 8, 2020 14:00 | July 9, 2020 08:15 | 18h 15m | 11,712 | 11K |
| 6 | January 26, 2020 10:15 | January 27, 2020 03:15 | 17h | 10,942 | 19K |
| 7 | December 30, 2020 13:45 | December 31, 2020 00:00 | 10h 15m | 8,771 | 2,433 |
| 8 | February 5, 2020 13:30 | February 9, 2020 13:30 | 4d | 8,615 | 16K |
| 9 | January 29, 2020 13:00 | January 31, 2020 12:00 | 1d 23h | 6,793 | 4,732 |
| 10 | July 2, 2020 14:15 | July 3, 2020 06:45 | 16h 30m | 6,617 | 2,420 |
Outage episodes by size in 2020: 178 reached 100+ customers, 80 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 2020, 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 | 2020 | 6.8 hrs | 1.88 | 2.0 hrs | 1.22 |
| 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 79% of Utah's customers in 2020; 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, 2020, 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/2020/utah/salt-lake-county