Carson CountyPower Outage History
2015–2025 · Texas
Bottom 20% least reliable nationally — frequent and/or long outages.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 28, 2020 | 138 hrs | 4,374 (97%) | Drought |
| Jul 12, 2025 | 8 hrs | 2,319 (51%) | Thunderstorm Wind |
| Jul 14, 2020 | 2 hrs | 2,301 (51%) | Drought |
| Nov 17, 2015 | 19 hrs | 2,241 (50%) | Tornado |
| Mar 17, 2021 | 34 hrs | 2,204 (49%) | Hail |
Over the 11 years from 2015 to 2025, Carson County recorded 531 distinct power outage events, averaging 3.4 hours per event.
The single worst outage on record in Carson County started October 28, 2020 (Drought), lasting 138 hours and leaving up to 4,374 customers without power (97% of the county) at its peak.
June has historically been the worst month for outages in Carson County, with 80 events recorded during that month across the dataset.
Based on this history, Carson County earns a Reliability Grade of F, placing it in the 16th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Texas
Counties with the closest reliability grade and national percentile to Carson County.
| County | Grade | National percentile |
|---|---|---|
| Brewster County | F | 16th |
| Briscoe County | F | 16th |
| Martin County | F | 16th |
| Willacy County | F | 16th |
| Irion County | F | 17th |
Most reliable counties in Texas
The top 3 counties in Texas by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Zavala County | A | 95th |
| Jasper County | A | 94th |
| Fayette County | A | 91st |
Least reliable counties in Texas
The bottom 3 counties in Texas by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Trinity County | F | 2nd |
| Orange County | F | 2nd |
| Marion County | F | 4th |
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 Carson County?
Between 2015 and 2025, Carson County recorded 531 outage events, averaging 3.4 hours each.
What is Carson County's reliability grade?
Carson County has a Reliability Grade of F, in the 16th national percentile.
What was the worst power outage in Carson County?
The worst outage on record started October 28, 2020 (Drought), lasting 138 hours and affecting up to 4,374 customers.