Aiken County Power Outage History
2014–2025 · South Carolina
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 27, 2024 | 332 hrs | 91,915 (42%) | Tropical Storm Helene |
| Sep 11, 2017 | 51 hrs | 24,396 (11%) | Heavy Rain |
| Oct 11, 2018 | 22 hrs | 19,096 (9%) | Tropical Storm Michael |
| Jun 8, 2025 | 12 hrs | 16,695 (8%) | Thunderstorm Wind |
| Apr 25, 2019 | 4 hrs | 16,271 (7%) | Unnamed event |
Over the 12 years from 2014 to 2025, Aiken County recorded 1,010 distinct power outage events, averaging 2.1 hours per event.
The single worst outage on record in Aiken County started September 27, 2024 (Tropical Storm Helene), lasting 332 hours and leaving up to 91,915 customers without power (42% of the county) at its peak.
June has historically been the worst month for outages in Aiken County, with 134 events recorded during that month across the dataset.
Based on this history, Aiken County earns a Reliability Grade of D, placing it in the 32nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Aiken County's outage profile
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Similar counties in South Carolina
Counties with the closest reliability grade and national percentile to Aiken County.
| County | Grade | National percentile |
|---|---|---|
| Darlington County | D | 34th |
| Lee County | D | 29th |
| Hampton County | D | 35th |
| Chester County | D | 36th |
| Cherokee County | D | 27th |
FAQ
How often does power go out in Aiken County?
Between 2014 and 2025, Aiken County recorded 1,010 outage events, averaging 2.1 hours each.
What is Aiken County's reliability grade?
Aiken County has a Reliability Grade of D, in the 32nd national percentile.
What was the worst power outage in Aiken County?
The worst outage on record started September 27, 2024 (Tropical Storm Helene), lasting 332 hours and affecting up to 91,915 customers.