DeKalb CountyPower Outage History
What this grade means
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 |
|---|---|---|---|
| Dec 31, 2025 | 1 hrs | 1,287 (12%) | Unnamed event |
| Feb 28, 2024 | <1 hr | 1,284 (12%) | Unnamed event |
| Dec 11, 2021 | 7 hrs | 1,251 (11%) | Unnamed event |
| Mar 1, 2017 | 5 hrs | 1,160 (11%) | Thunderstorm Wind |
| Jan 3, 2022 | 6 hrs | 725 (7%) | Winter Storm |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for DeKalb County, Tennessee that day.
Over the 11 years from 2015 to 2025, DeKalb County recorded 52 distinct power outage events, averaging 1.4 hours per event.
The single worst outage on record in DeKalb County started December 31, 2025, lasting 1 hours and leaving up to 1,287 customers without power (12% of the county) at its peak.
January has historically been the worst month for outages in DeKalb County, with 8 events recorded during that month across the dataset.
Based on this history, DeKalb County earns a Reliability Grade of A, placing it in the 97th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to DeKalb County.
| County | Grade | National percentile |
|---|---|---|
| Putnam County | A | 98th |
| Unicoi County | A | 96th |
| Dyer County | A | 96th |
| Scott County | A | 98th |
| Jackson County | A | 99th |
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 DeKalb County?
Between 2015 and 2025, DeKalb County recorded 52 outage events, averaging 1.4 hours each.
What is DeKalb County's reliability grade?
DeKalb County has a Reliability Grade of A, in the 97th national percentile.
What was the worst power outage in DeKalb County?
The worst outage on record started December 31, 2025, lasting 1 hours and affecting up to 1,287 customers.