DeKalb County Power Outage History
2015–2025 · Tennessee
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
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 hrs | 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 |
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).
Sized for DeKalb County's outage profile
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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 |
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.