Carbon County Power Outage History
2017–2025 · Wyoming
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 |
|---|---|---|---|
| Aug 25, 2025 | 15 hrs | 5,551 (51%) | Unnamed event |
| Aug 6, 2020 | 2 hrs | 5,403 (50%) | Unnamed event |
| Oct 8, 2020 | 1 hrs | 3,155 (29%) | Wildfire |
| Jun 29, 2025 | 1 hrs | 3,107 (29%) | Thunderstorm Wind |
| Feb 17, 2025 | 1 hrs | 3,095 (28%) | High Wind |
Over the 9 years from 2017 to 2025, Carbon County recorded 216 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Carbon County started August 25, 2025, lasting 15 hours and leaving up to 5,551 customers without power (51% of the county) at its peak.
June has historically been the worst month for outages in Carbon County, with 31 events recorded during that month across the dataset.
Based on this history, Carbon County earns a Reliability Grade of B, placing it in the 75th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Carbon County's outage profile
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Outage-prep kit
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Similar counties in Wyoming
Counties with the closest reliability grade and national percentile to Carbon County.
| County | Grade | National percentile |
|---|---|---|
| Hot Springs County | B | 73rd |
| Albany County | B | 71st |
| Campbell County | B | 80th |
| Johnson County | B | 69th |
| Sweetwater County | A | 81st |
FAQ
How often does power go out in Carbon County?
Between 2017 and 2025, Carbon County recorded 216 outage events, averaging 2.4 hours each.
What is Carbon County's reliability grade?
Carbon County has a Reliability Grade of B, in the 75th national percentile.
What was the worst power outage in Carbon County?
The worst outage on record started August 25, 2025, lasting 15 hours and affecting up to 5,551 customers.