Clay CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 9, 2020 | <1 hr | 100 (1%) | Unnamed event |
| Apr 27, 2020 | <1 hr | 99 (1%) | Unnamed event |
| Sep 15, 2021 | <1 hr | 94 (1%) | Drought |
| Jul 17, 2019 | <1 hr | 87 (1%) | Thunderstorm Wind |
| Jul 12, 2023 | 1 hrs | 72 (1%) | Drought |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Clay County, South Dakota that day.
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 less than 1 hour 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).
Similar counties in South Dakota
Counties with the closest reliability grade and national percentile to Clay County.
| County | Grade | National percentile |
|---|---|---|
| Bennett County | Not ranked | — |
| Codington County | A | 98th |
| Tripp County | A | 98th |
| Hughes County | A | 98th |
| Gregory County | A | 98th |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
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 less than 1 hour and affecting up to 100 customers.