Knox CountyPower Outage History
2014–2025 · Texas
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 9, 2025 | 38 hrs | 2,566 (92%) | Thunderstorm Wind |
| Oct 28, 2020 | 68 hrs | 2,452 (88%) | Ice Storm |
| Feb 3, 2022 | 2 hrs | 1,826 (66%) | Drought |
| Feb 18, 2025 | 3 hrs | 1,542 (55%) | Unnamed event |
| Feb 17, 2021 | 28 hrs | 1,358 (49%) | Winter Storm Uri |
Over the 12 years from 2014 to 2025, Knox County recorded 453 distinct power outage events, averaging 3.4 hours per event.
The single worst outage on record in Knox County started June 9, 2025 (Thunderstorm Wind), lasting 38 hours and leaving up to 2,566 customers without power (92% of the county) at its peak.
June has historically been the worst month for outages in Knox County, with 62 events recorded during that month across the dataset.
Based on this history, Knox County earns a Reliability Grade of D, placing it in the 21st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Knox County's outage profile
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Read our mission →Similar counties in Texas
Counties with the closest reliability grade and national percentile to Knox County.
| County | Grade | National percentile |
|---|---|---|
| Matagorda County | D | 21st |
| Sutton County | D | 21st |
| Smith County | D | 22nd |
| Concho County | D | 22nd |
| Jim Hogg County | D | 22nd |
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 Knox County?
Between 2014 and 2025, Knox County recorded 453 outage events, averaging 3.4 hours each.
What is Knox County's reliability grade?
Knox County has a Reliability Grade of D, in the 21st national percentile.
What was the worst power outage in Knox County?
The worst outage on record started June 9, 2025 (Thunderstorm Wind), lasting 38 hours and affecting up to 2,566 customers.