Campbell CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Campbell County, Wyoming that day.
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).
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 |
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 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.