Anderson County Power Outage History
2014–2025 · 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 7, 2024 | 0 hrs | 5,817 (13%) | Unnamed event |
| Apr 15, 2022 | 1 hrs | 5,584 (13%) | Unnamed event |
| Oct 14, 2015 | 0 hrs | 5,576 (13%) | Unnamed event |
| Oct 6, 2015 | 0 hrs | 5,571 (13%) | Unnamed event |
| Jul 7, 2016 | 3 hrs | 5,397 (12%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Anderson County recorded 486 distinct power outage events, averaging 1.2 hours per event.
The single worst outage on record in Anderson County started December 7, 2024, lasting 0 hours and leaving up to 5,817 customers without power (13% of the county) at its peak.
July has historically been the worst month for outages in Anderson County, with 55 events recorded during that month across the dataset.
Based on this history, Anderson County earns a Reliability Grade of A, placing it in the 91st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Anderson County's outage profile
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Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Anderson County.
| County | Grade | National percentile |
|---|---|---|
| Smith County | A | 92nd |
| Hardeman County | A | 92nd |
| Rutherford County | A | 92nd |
| Williamson County | A | 90th |
| Hamblen County | A | 90th |
FAQ
How often does power go out in Anderson County?
Between 2014 and 2025, Anderson County recorded 486 outage events, averaging 1.2 hours each.
What is Anderson County's reliability grade?
Anderson County has a Reliability Grade of A, in the 91st national percentile.
What was the worst power outage in Anderson County?
The worst outage on record started December 7, 2024, lasting 0 hours and affecting up to 5,817 customers.