Colleton 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 | 155 hrs | 23,386 (38%) | Tornado |
| Jul 28, 2021 | 3 hrs | 15,685 (26%) | Thunderstorm Wind |
| Apr 13, 2020 | 37 hrs | 12,944 (21%) | Thunderstorm Wind |
| Oct 8, 2016 | 16 hrs | 11,786 (19%) | Storm Surge/Tide |
| Oct 8, 2016 | 141 hrs | 11,286 (18%) | Storm Surge/Tide |
Over the 12 years from 2014 to 2025, Colleton County recorded 913 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Colleton County started September 27, 2024 (Tornado), lasting 155 hours and leaving up to 23,386 customers without power (38% of the county) at its peak.
August has historically been the worst month for outages in Colleton County, with 130 events recorded during that month across the dataset.
Based on this history, Colleton County earns a Reliability Grade of D, placing it in the 38th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Colleton County's outage profile
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Similar counties in South Carolina
Counties with the closest reliability grade and national percentile to Colleton County.
| County | Grade | National percentile |
|---|---|---|
| Chester County | D | 36th |
| Allendale County | C | 40th |
| Hampton County | D | 35th |
| Florence County | C | 41st |
| Darlington County | D | 34th |
FAQ
How often does power go out in Colleton County?
Between 2014 and 2025, Colleton County recorded 913 outage events, averaging 2.6 hours each.
What is Colleton County's reliability grade?
Colleton County has a Reliability Grade of D, in the 38th national percentile.
What was the worst power outage in Colleton County?
The worst outage on record started September 27, 2024 (Tornado), lasting 155 hours and affecting up to 23,386 customers.