County annual report · FIPS 49035
2017 Salt Lake County, UT Power Outage Report
In 2017, customers in Salt Lake County, UT went without power for an average of 0.8 hours, a total of 374K customer-hours (Utah average 1.0 hours). That ranks 20th worst of 26 Utah counties and 2160th of 2,786 nationally.
Compared with UT, the US
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Salt Lake County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 9, 2017 13:30 | October 10, 2017 06:15 | 16h 45m | 11,607 | 4,675 |
| 2 | November 21, 2017 10:00 | November 22, 2017 09:30 | 23h 30m | 10,321 | 24K |
| 3 | April 14, 2017 01:15 | April 14, 2017 01:45 | 30m | 7,312 | 3,656 |
| 4 | September 15, 2017 08:00 | September 16, 2017 08:15 | 1d | 7,077 | 20K |
| 5 | November 9, 2017 08:30 | November 9, 2017 10:00 | 1h 30m | 5,979 | 6,478 |
| 6 | September 16, 2017 09:30 | September 17, 2017 08:30 | 23h | 5,167 | 8,775 |
| 7 | September 28, 2017 13:15 | September 29, 2017 06:00 | 16h 45m | 4,845 | 7,000 |
| 8 | November 10, 2017 15:15 | November 11, 2017 05:30 | 14h 15m | 3,471 | 3,261 |
| 9 | October 20, 2017 13:00 | October 21, 2017 07:15 | 18h 15m | 3,425 | 4,706 |
| 10 | August 3, 2017 13:15 | August 7, 2017 04:15 | 3d 15h | 3,252 | 12K |
Outage episodes by size in 2017: 99 reached 100+ customers, 42 reached 1,000+ customers, 2 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 2017, 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 | 2017 | 5.2 hrs | 2.01 | 2.4 hrs | 1.43 |
| 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 2017; 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, 2017, 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/2017/utah/salt-lake-county