St. Clair County Power Outage History
2017–2025 · Alabama
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 29, 2020 | 110 hrs | 16,066 (31%) | Tropical Storm |
| Feb 6, 2021 | 1 hrs | 14,017 (27%) | Unnamed event |
| Sep 24, 2018 | 9 hrs | 13,900 (27%) | Unnamed event |
| Jul 28, 2023 | 5 hrs | 12,711 (25%) | Unnamed event |
| Oct 28, 2025 | 1 hrs | 7,960 (15%) | Unnamed event |
Over the 9 years from 2017 to 2025, St. Clair County recorded 1,038 distinct power outage events, averaging 2.7 hours per event.
The single worst outage on record in St. Clair County started October 29, 2020 (Tropical Storm), lasting 110 hours and leaving up to 16,066 customers without power (31% of the county) at its peak.
June has historically been the worst month for outages in St. Clair County, with 119 events recorded during that month across the dataset.
Based on this history, St. Clair County earns a Reliability Grade of C, placing it in the 44th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Alabama
Counties with the closest reliability grade and national percentile to St. Clair County.
| County | Grade | National percentile |
|---|---|---|
| Henry County | C | 44th |
| Shelby County | C | 44th |
| Hale County | C | 46th |
| Blount County | C | 41st |
| Cullman County | C | 49th |
FAQ
How often does power go out in St. Clair County?
Between 2017 and 2025, St. Clair County recorded 1,038 outage events, averaging 2.7 hours each.
What is St. Clair County's reliability grade?
St. Clair County has a Reliability Grade of C, in the 44th national percentile.
What was the worst power outage in St. Clair County?
The worst outage on record started October 29, 2020 (Tropical Storm), lasting 110 hours and affecting up to 16,066 customers.