Allendale County Power Outage History
2014–2025 · South Carolina
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 |
|---|---|---|---|
| Sep 27, 2024 | 186 hrs | 4,541 (36%) | Tropical Storm |
| Oct 8, 2016 | 116 hrs | 3,531 (28%) | Unnamed event |
| Oct 8, 2016 | 15 hrs | 2,789 (22%) | Unnamed event |
| Oct 11, 2018 | 35 hrs | 2,735 (22%) | Unnamed event |
| Oct 12, 2017 | 0 hrs | 2,526 (20%) | Unnamed event |
Over the 12 years from 2014 to 2025, Allendale County recorded 528 distinct power outage events, averaging 2.7 hours per event.
The single worst outage on record in Allendale County started September 27, 2024 (Tropical Storm), lasting 186 hours and leaving up to 4,541 customers without power (36% of the county) at its peak.
May has historically been the worst month for outages in Allendale County, with 66 events recorded during that month across the dataset.
Based on this history, Allendale County earns a Reliability Grade of C, placing it in the 40th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in South Carolina
Counties with the closest reliability grade and national percentile to Allendale County.
| County | Grade | National percentile |
|---|---|---|
| Florence County | C | 41st |
| Chesterfield County | C | 42nd |
| Colleton County | D | 38th |
| Chester County | D | 36th |
| Hampton County | D | 35th |
FAQ
How often does power go out in Allendale County?
Between 2014 and 2025, Allendale County recorded 528 outage events, averaging 2.7 hours each.
What is Allendale County's reliability grade?
Allendale County has a Reliability Grade of C, in the 40th national percentile.
What was the worst power outage in Allendale County?
The worst outage on record started September 27, 2024 (Tropical Storm), lasting 186 hours and affecting up to 4,541 customers.