Berkeley County Power Outage History
2014–2025 · South Carolina
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 5, 2019 | 63 hrs | 38,691 (11%) | Tropical Storm |
| Sep 30, 2022 | 36 hrs | 37,481 (10%) | Hurricane Ian |
| Apr 13, 2020 | 31 hrs | 21,751 (6%) | Thunderstorm Wind |
| Jun 9, 2025 | 6 hrs | 20,654 (6%) | Thunderstorm Wind |
| Mar 5, 2025 | 1 hrs | 18,917 (5%) | Wildfire |
Over the 12 years from 2014 to 2025, Berkeley County recorded 1,662 distinct power outage events, averaging 1.3 hours per event.
The single worst outage on record in Berkeley County started September 5, 2019 (Tropical Storm), lasting 63 hours and leaving up to 38,691 customers without power (11% of the county) at its peak.
July has historically been the worst month for outages in Berkeley County, with 186 events recorded during that month across the dataset.
Based on this history, Berkeley County earns a Reliability Grade of A, placing it in the 90th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Berkeley County's outage profile
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Outage-prep kit
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Similar counties in South Carolina
Counties with the closest reliability grade and national percentile to Berkeley County.
| County | Grade | National percentile |
|---|---|---|
| York County | A | 84th |
| Kershaw County | A | 83rd |
| Orangeburg County | B | 80th |
| Union County | B | 80th |
| Richland County | B | 76th |
FAQ
How often does power go out in Berkeley County?
Between 2014 and 2025, Berkeley County recorded 1,662 outage events, averaging 1.3 hours each.
What is Berkeley County's reliability grade?
Berkeley County has a Reliability Grade of A, in the 90th national percentile.
What was the worst power outage in Berkeley County?
The worst outage on record started September 5, 2019 (Tropical Storm), lasting 63 hours and affecting up to 38,691 customers.