Carbon 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 |
|---|---|---|---|
| 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 hr | 3,095 (28%) | High Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Carbon County, Wyoming that day.
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).
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 |
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 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.