York 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 27, 2024 | 116 hrs | 59,979 (20%) | Flash Flood |
| Apr 13, 2020 | 37 hrs | 13,769 (5%) | Thunderstorm Wind |
| Jul 27, 2021 | 1 hrs | 13,126 (4%) | Thunderstorm Wind |
| Feb 23, 2023 | 2 hrs | 12,378 (4%) | Unnamed event |
| Jun 26, 2023 | 2 hrs | 10,967 (4%) | Unnamed event |
Over the 12 years from 2014 to 2025, York County recorded 845 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in York County started September 27, 2024 (Flash Flood), lasting 116 hours and leaving up to 59,979 customers without power (20% of the county) at its peak.
July has historically been the worst month for outages in York County, with 99 events recorded during that month across the dataset.
Based on this history, York County earns a Reliability Grade of A, placing it in the 84th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for York County's outage profile
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Similar counties in South Carolina
Counties with the closest reliability grade and national percentile to York County.
| County | Grade | National percentile |
|---|---|---|
| Kershaw County | A | 83rd |
| Orangeburg County | B | 80th |
| Union County | B | 80th |
| Berkeley County | A | 90th |
| Richland County | B | 76th |
FAQ
How often does power go out in York County?
Between 2014 and 2025, York County recorded 845 outage events, averaging 2.9 hours each.
What is York County's reliability grade?
York County has a Reliability Grade of A, in the 84th national percentile.
What was the worst power outage in York County?
The worst outage on record started September 27, 2024 (Flash Flood), lasting 116 hours and affecting up to 59,979 customers.