Clarendon 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 |
|---|---|---|---|
| Oct 13, 2017 | 3 hrs | 6,701 (22%) | Unnamed event |
| Aug 10, 2021 | 0 hrs | 6,546 (21%) | Unnamed event |
| Oct 8, 2016 | 7 hrs | 6,298 (21%) | Hurricane Matthew |
| Oct 8, 2016 | 138 hrs | 6,285 (21%) | Hurricane Matthew |
| Apr 19, 2019 | 15 hrs | 5,407 (18%) | Tornado |
Over the 12 years from 2014 to 2025, Clarendon County recorded 596 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Clarendon County started October 13, 2017, lasting 3 hours and leaving up to 6,701 customers without power (22% of the county) at its peak.
June has historically been the worst month for outages in Clarendon County, with 81 events recorded during that month across the dataset.
Based on this history, Clarendon County earns a Reliability Grade of C, placing it in the 58th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Clarendon County's outage profile
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Similar counties in South Carolina
Counties with the closest reliability grade and national percentile to Clarendon County.
| County | Grade | National percentile |
|---|---|---|
| Sumter County | C | 56th |
| Calhoun County | B | 60th |
| Marlboro County | C | 55th |
| Bamberg County | B | 62nd |
| Jasper County | C | 54th |
FAQ
How often does power go out in Clarendon County?
Between 2014 and 2025, Clarendon County recorded 596 outage events, averaging 2.3 hours each.
What is Clarendon County's reliability grade?
Clarendon County has a Reliability Grade of C, in the 58th national percentile.
What was the worst power outage in Clarendon County?
The worst outage on record started October 13, 2017, lasting 3 hours and affecting up to 6,701 customers.