Knox CountyPower Outage History
2014–2025 · Missouri
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 11, 2015 | <1 hr | 1,156 (30%) | Thunderstorm Wind |
| Nov 11, 2014 | 1 hrs | 1,129 (29%) | Unnamed event |
| Jan 4, 2020 | 2 hrs | 1,113 (29%) | Unnamed event |
| Jan 9, 2024 | 20 hrs | 1,050 (27%) | Winter Storm |
| Jun 28, 2015 | 2 hrs | 850 (22%) | Flash Flood |
Over the 12 years from 2014 to 2025, Knox County recorded 230 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Knox County started November 11, 2015 (Thunderstorm Wind), lasting less than 1 hour and leaving up to 1,156 customers without power (30% of the county) at its peak.
July has historically been the worst month for outages in Knox County, with 39 events recorded during that month across the dataset.
Based on this history, Knox County earns a Reliability Grade of A, placing it in the 84th 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 Missouri
Counties with the closest reliability grade and national percentile to Knox County.
| County | Grade | National percentile |
|---|---|---|
| Morgan County | A | 84th |
| Dallas County | A | 84th |
| Monroe County | A | 85th |
| Johnson County | A | 84th |
| Phelps County | A | 85th |
Most reliable counties in Missouri
The top 3 counties in Missouri by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Mercer County | A | 98th |
| McDonald County | A | 97th |
| Boone County | A | 97th |
Least reliable counties in Missouri
The bottom 3 counties in Missouri by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| St. Louis County | F | 10th |
| Reynolds County | F | 20th |
| Iron County | D | 22nd |
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 230 outage events, averaging 2.2 hours each.
What is Knox County's reliability grade?
Knox County has a Reliability Grade of A, in the 84th national percentile.
What was the worst power outage in Knox County?
The worst outage on record started November 11, 2015 (Thunderstorm Wind), lasting less than 1 hour and affecting up to 1,156 customers.