Clay County Power Outage History
2019–2023 · 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 |
|---|---|---|---|
| Jun 9, 2020 | 1 hrs | 100 (1%) | Unnamed event |
| Apr 27, 2020 | 1 hrs | 99 (1%) | Unnamed event |
| Sep 15, 2021 | 1 hrs | 94 (1%) | Drought |
| Jul 17, 2019 | 0 hrs | 87 (1%) | Thunderstorm Wind |
| Jul 30, 2023 | 0 hrs | 72 (1%) | Drought |
Over the 5 years from 2019 to 2023, Clay County recorded 13 distinct power outage events, averaging 0.5 hours per event.
The single worst outage on record in Clay County started June 9, 2020, lasting 1 hours and leaving up to 100 customers without power (1% of the county) at its peak.
July has historically been the worst month for outages in Clay County, with 5 events recorded during that month across the dataset.
Based on this history, Clay County earns a Reliability Grade of A, placing it in the 100th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Clay County's outage profile
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Similar counties in South Dakota
Counties with the closest reliability grade and national percentile to Clay County.
| County | Grade | National percentile |
|---|---|---|
| Bennett County | A | 99th |
| Codington County | A | 98th |
| Tripp County | A | 98th |
| Hughes County | A | 98th |
| Gregory County | A | 98th |
FAQ
How often does power go out in Clay County?
Between 2019 and 2023, Clay County recorded 13 outage events, averaging 0.5 hours each.
What is Clay County's reliability grade?
Clay County has a Reliability Grade of A, in the 100th national percentile.
What was the worst power outage in Clay County?
The worst outage on record started June 9, 2020, lasting 1 hours and affecting up to 100 customers.