Anderson CountyPower Outage History
What this grade means
Bottom 20% least reliable nationally — frequent and/or long outages. This county ranks in the least reliable fifth of all US counties in our dataset: some combination of frequent outages, long restoration times, or customers affected puts it near the bottom nationally. Backup power is worth prioritizing here rather than treating it as optional.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 27, 2024 | 282 hrs | 106,940 (67%) | Tropical Storm |
| Sep 11, 2017 | 82 hrs | 27,678 (17%) | Tropical Storm Irma |
| May 9, 2024 | 61 hrs | 25,580 (16%) | Hail |
| Feb 17, 2015 | 30 hrs | 24,801 (16%) | High Wind |
| Feb 16, 2015 | 20 hrs | 23,789 (15%) | High Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Anderson County, South Carolina that day.
Over the 12 years from 2014 to 2025, Anderson County recorded 1,320 distinct power outage events, averaging 3.6 hours per event.
The single worst outage on record in Anderson County started September 27, 2024 (Tropical Storm), lasting 282 hours and leaving up to 106,940 customers without power (67% of the county) at its peak.
June has historically been the worst month for outages in Anderson County, with 174 events recorded during that month across the dataset.
Based on this history, Anderson County earns a Reliability Grade of F, placing it in the 14th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in South Carolina
Counties with the closest reliability grade and national percentile to Anderson County.
| County | Grade | National percentile |
|---|---|---|
| Marion County | F | 14th |
| Spartanburg County | F | 12th |
| Abbeville County | F | 15th |
| Dillon County | F | 12th |
| Greenville County | F | 8th |
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 Anderson County?
Between 2014 and 2025, Anderson County recorded 1,320 outage events, averaging 3.6 hours each.
What is Anderson County's reliability grade?
Anderson County has a Reliability Grade of F, in the 14th national percentile.
What was the worst power outage in Anderson County?
The worst outage on record started September 27, 2024 (Tropical Storm), lasting 282 hours and affecting up to 106,940 customers.