Tooele County Power Outage History
2017–2025 · Utah
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 20, 2022 | 2 hrs | 11,237 (38%) | Unnamed event |
| Aug 27, 2017 | 3 hrs | 11,178 (38%) | Unnamed event |
| Mar 8, 2024 | 0 hrs | 7,706 (26%) | High Wind |
| Jun 19, 2024 | 0 hrs | 5,755 (19%) | Thunderstorm Wind |
| Mar 14, 2025 | 0 hrs | 5,645 (19%) | Unnamed event |
Over the 9 years from 2017 to 2025, Tooele County recorded 387 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Tooele County started April 20, 2022, lasting 2 hours and leaving up to 11,237 customers without power (38% of the county) at its peak.
July has historically been the worst month for outages in Tooele County, with 60 events recorded during that month across the dataset.
Based on this history, Tooele County earns a Reliability Grade of B, placing it in the 70th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Tooele County's outage profile
See more picks in our Best Small Power Stations (Under 1,000Wh) roundup.
Outage-prep kit
See our outage-prep guides.
Similar counties in Utah
Counties with the closest reliability grade and national percentile to Tooele County.
| County | Grade | National percentile |
|---|---|---|
| Salt Lake County | B | 70th |
| Carbon County | B | 70th |
| Juab County | B | 71st |
| Emery County | B | 72nd |
| Sevier County | B | 72nd |
FAQ
How often does power go out in Tooele County?
Between 2017 and 2025, Tooele County recorded 387 outage events, averaging 2.4 hours each.
What is Tooele County's reliability grade?
Tooele County has a Reliability Grade of B, in the 70th national percentile.
What was the worst power outage in Tooele County?
The worst outage on record started April 20, 2022, lasting 2 hours and affecting up to 11,237 customers.