Charles Mix County Power Outage History
2020–2025 · South Dakota
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 |
|---|---|---|---|
| Oct 5, 2020 | 3 hrs | 1,464 (19%) | Unnamed event |
| Feb 16, 2021 | 3 hrs | 1,464 (19%) | Extreme Cold/Wind Chill |
| Jun 9, 2020 | 6 hrs | 1,364 (18%) | Hail |
| Jul 3, 2020 | 4 hrs | 1,209 (16%) | Thunderstorm Wind |
| Jul 30, 2024 | 7 hrs | 1,204 (16%) | Unnamed event |
Over the 6 years from 2020 to 2025, Charles Mix County recorded 74 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Charles Mix County started October 5, 2020, lasting 3 hours and leaving up to 1,464 customers without power (19% of the county) at its peak.
July has historically been the worst month for outages in Charles Mix County, with 13 events recorded during that month across the dataset.
Based on this history, Charles Mix County earns a Reliability Grade of A, placing it in the 90th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Charles Mix County's outage profile
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Similar counties in South Dakota
Counties with the closest reliability grade and national percentile to Charles Mix County.
| County | Grade | National percentile |
|---|---|---|
| Davison County | A | 90th |
| Brown County | A | 90th |
| Hutchinson County | A | 90th |
| Douglas County | A | 90th |
| Brookings County | A | 91st |
FAQ
How often does power go out in Charles Mix County?
Between 2020 and 2025, Charles Mix County recorded 74 outage events, averaging 2.6 hours each.
What is Charles Mix County's reliability grade?
Charles Mix County has a Reliability Grade of A, in the 90th national percentile.
What was the worst power outage in Charles Mix County?
The worst outage on record started October 5, 2020, lasting 3 hours and affecting up to 1,464 customers.