Barnwell County Power Outage History
2014–2025 · South Carolina
Better than average — fewer or shorter 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 |
|---|---|---|---|
| Apr 13, 2020 | 37 hrs | 7,897 (26%) | Tornado |
| Sep 27, 2024 | 182 hrs | 6,437 (21%) | Tropical Storm Helene |
| Sep 11, 2017 | 17 hrs | 5,426 (18%) | Thunderstorm Wind |
| Oct 8, 2016 | 13 hrs | 4,839 (16%) | Hurricane Matthew |
| May 6, 2022 | 17 hrs | 4,125 (13%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Barnwell County recorded 402 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Barnwell County started April 13, 2020 (Tornado), lasting 37 hours and leaving up to 7,897 customers without power (26% of the county) at its peak.
July has historically been the worst month for outages in Barnwell County, with 54 events recorded during that month across the dataset.
Based on this history, Barnwell County earns a Reliability Grade of B, placing it in the 68th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Barnwell County's outage profile
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Similar counties in South Carolina
Counties with the closest reliability grade and national percentile to Barnwell County.
| County | Grade | National percentile |
|---|---|---|
| Lancaster County | B | 68th |
| Beaufort County | B | 69th |
| Charleston County | B | 69th |
| Lexington County | B | 67th |
| Georgetown County | B | 72nd |
FAQ
How often does power go out in Barnwell County?
Between 2014 and 2025, Barnwell County recorded 402 outage events, averaging 2.6 hours each.
What is Barnwell County's reliability grade?
Barnwell County has a Reliability Grade of B, in the 68th national percentile.
What was the worst power outage in Barnwell County?
The worst outage on record started April 13, 2020 (Tornado), lasting 37 hours and affecting up to 7,897 customers.