Marlboro 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 |
|---|---|---|---|
| Jan 22, 2016 | 33 hrs | 4,421 (23%) | Winter Weather |
| Oct 8, 2016 | 115 hrs | 4,202 (22%) | Hurricane Matthew |
| Sep 15, 2018 | 108 hrs | 4,043 (21%) | Unnamed event |
| Apr 13, 2020 | 21 hrs | 3,518 (18%) | Thunderstorm Wind |
| Mar 2, 2018 | 1 hrs | 3,359 (17%) | Unnamed event |
Over the 12 years from 2014 to 2025, Marlboro County recorded 276 distinct power outage events, averaging 3.6 hours per event.
The single worst outage on record in Marlboro County started January 22, 2016 (Winter Weather), lasting 33 hours and leaving up to 4,421 customers without power (23% of the county) at its peak.
July has historically been the worst month for outages in Marlboro County, with 39 events recorded during that month across the dataset.
Based on this history, Marlboro County earns a Reliability Grade of C, placing it in the 55th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Marlboro County's outage profile
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Similar counties in South Carolina
Counties with the closest reliability grade and national percentile to Marlboro County.
| County | Grade | National percentile |
|---|---|---|
| Sumter County | C | 56th |
| Jasper County | C | 54th |
| Clarendon County | C | 58th |
| Williamsburg County | C | 52nd |
| Calhoun County | B | 60th |
FAQ
How often does power go out in Marlboro County?
Between 2014 and 2025, Marlboro County recorded 276 outage events, averaging 3.6 hours each.
What is Marlboro County's reliability grade?
Marlboro County has a Reliability Grade of C, in the 55th national percentile.
What was the worst power outage in Marlboro County?
The worst outage on record started January 22, 2016 (Winter Weather), lasting 33 hours and affecting up to 4,421 customers.