Grand County Power Outage History
2017–2025 · Utah
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 3, 2020 | 5 hrs | 6,928 (100%) | Thunderstorm Wind |
| Aug 6, 2023 | 3 hrs | 4,551 (66%) | Thunderstorm Wind |
| Jul 29, 2021 | 6 hrs | 4,507 (65%) | Drought |
| Jan 18, 2023 | 12 hrs | 3,596 (52%) | Drought |
| Aug 6, 2023 | 2 hrs | 3,538 (51%) | Thunderstorm Wind |
Over the 9 years from 2017 to 2025, Grand County recorded 351 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Grand County started August 3, 2020 (Thunderstorm Wind), lasting 5 hours and leaving up to 6,928 customers without power (100% of the county) at its peak.
August has historically been the worst month for outages in Grand County, with 58 events recorded during that month across the dataset.
Based on this history, Grand County earns a Reliability Grade of C, placing it in the 58th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Utah
Counties with the closest reliability grade and national percentile to Grand County.
| County | Grade | National percentile |
|---|---|---|
| Box Elder County | B | 62nd |
| Millard County | B | 63rd |
| Sanpete County | B | 65th |
| Iron County | B | 66th |
| Weber County | C | 47th |
Most reliable counties in Utah
The top 3 counties in Utah by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Daggett County | A | 98th |
| Kane County | A | 98th |
| Duchesne County | A | 97th |
Least reliable counties in Utah
The bottom 3 counties in Utah by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Morgan County | D | 25th |
| Beaver County | D | 34th |
| Summit County | D | 36th |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Grand County?
Between 2017 and 2025, Grand County recorded 351 outage events, averaging 2.5 hours each.
What is Grand County's reliability grade?
Grand County has a Reliability Grade of C, in the 58th national percentile.
What was the worst power outage in Grand County?
The worst outage on record started August 3, 2020 (Thunderstorm Wind), lasting 5 hours and affecting up to 6,928 customers.