Campbell County Power Outage History
2019–2025 · 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 |
|---|---|---|---|
| Nov 13, 2025 | 6 hrs | 12,319 (43%) | Unnamed event |
| Jan 3, 2022 | 3 hrs | 3,047 (11%) | Unnamed event |
| Jun 29, 2020 | 4 hrs | 2,923 (10%) | Thunderstorm Wind |
| Jun 6, 2020 | 9 hrs | 2,909 (10%) | Hail |
| Jun 28, 2020 | 3 hrs | 2,690 (9%) | Thunderstorm Wind |
Over the 7 years from 2019 to 2025, Campbell County recorded 547 distinct power outage events, averaging 1.7 hours per event.
The single worst outage on record in Campbell County started November 13, 2025, lasting 6 hours and leaving up to 12,319 customers without power (43% of the county) at its peak.
August has historically been the worst month for outages in Campbell County, with 79 events recorded during that month across the dataset.
Based on this history, Campbell County earns a Reliability Grade of B, placing it in the 80th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Campbell 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 Wyoming
Counties with the closest reliability grade and national percentile to Campbell County.
| County | Grade | National percentile |
|---|---|---|
| Sweetwater County | A | 81st |
| Sheridan County | A | 82nd |
| Big Horn County | A | 82nd |
| Carbon County | B | 75th |
| Hot Springs County | B | 73rd |
FAQ
How often does power go out in Campbell County?
Between 2019 and 2025, Campbell County recorded 547 outage events, averaging 1.7 hours each.
What is Campbell County's reliability grade?
Campbell County has a Reliability Grade of B, in the 80th national percentile.
What was the worst power outage in Campbell County?
The worst outage on record started November 13, 2025, lasting 6 hours and affecting up to 12,319 customers.