Minnehaha County Power Outage History
2015–2025 · South Dakota
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 |
|---|---|---|---|
| Jul 5, 2022 | 29 hrs | 23,986 (20%) | Thunderstorm Wind |
| Apr 13, 2023 | 1 hrs | 16,994 (14%) | Flood |
| May 12, 2022 | 68 hrs | 16,409 (14%) | Thunderstorm Wind |
| Sep 11, 2019 | 22 hrs | 13,763 (11%) | Thunderstorm Wind |
| May 7, 2018 | 2 hrs | 13,253 (11%) | Flood |
Over the 11 years from 2015 to 2025, Minnehaha County recorded 582 distinct power outage events, averaging 7.2 hours per event.
The single worst outage on record in Minnehaha County started July 5, 2022 (Thunderstorm Wind), lasting 29 hours and leaving up to 23,986 customers without power (20% of the county) at its peak.
June has historically been the worst month for outages in Minnehaha County, with 89 events recorded during that month across the dataset.
Based on this history, Minnehaha County earns a Reliability Grade of B, placing it in the 61st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Minnehaha County's outage profile
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Similar counties in South Dakota
Counties with the closest reliability grade and national percentile to Minnehaha County.
| County | Grade | National percentile |
|---|---|---|
| Turner County | B | 64th |
| Deuel County | C | 57th |
| Haakon County | C | 57th |
| Day County | B | 65th |
| Lake County | B | 65th |
FAQ
How often does power go out in Minnehaha County?
Between 2015 and 2025, Minnehaha County recorded 582 outage events, averaging 7.2 hours each.
What is Minnehaha County's reliability grade?
Minnehaha County has a Reliability Grade of B, in the 61st national percentile.
What was the worst power outage in Minnehaha County?
The worst outage on record started July 5, 2022 (Thunderstorm Wind), lasting 29 hours and affecting up to 23,986 customers.