Cumberland County Power Outage History
2019–2025 · Tennessee
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 26, 2019 | 5 hrs | 26,263 (45%) | Drought |
| May 23, 2024 | 1 hrs | 19,122 (33%) | Thunderstorm Wind |
| May 27, 2024 | 4 hrs | 19,101 (33%) | Thunderstorm Wind |
| Mar 16, 2025 | 26 hrs | 14,944 (26%) | Drought |
| Oct 26, 2019 | 1 hrs | 12,709 (22%) | Drought |
Over the 7 years from 2019 to 2025, Cumberland County recorded 757 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Cumberland County started October 26, 2019 (Drought), lasting 5 hours and leaving up to 26,263 customers without power (45% of the county) at its peak.
July has historically been the worst month for outages in Cumberland County, with 116 events recorded during that month across the dataset.
Based on this history, Cumberland County earns a Reliability Grade of C, placing it in the 52nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Cumberland County's outage profile
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Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Cumberland County.
| County | Grade | National percentile |
|---|---|---|
| Knox County | C | 52nd |
| Blount County | C | 52nd |
| Trousdale County | C | 52nd |
| Robertson County | C | 53rd |
| Grainger County | C | 49th |
FAQ
How often does power go out in Cumberland County?
Between 2019 and 2025, Cumberland County recorded 757 outage events, averaging 1.9 hours each.
What is Cumberland County's reliability grade?
Cumberland County has a Reliability Grade of C, in the 52nd national percentile.
What was the worst power outage in Cumberland County?
The worst outage on record started October 26, 2019 (Drought), lasting 5 hours and affecting up to 26,263 customers.