Adair CountyPower Outage History
2015–2025 · Iowa
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 30, 2024 | 1 hrs | 865 (23%) | Thunderstorm Wind |
| Apr 30, 2022 | 1 hrs | 712 (19%) | High Wind |
| May 21, 2024 | 5 hrs | 684 (18%) | Hail |
| May 9, 2021 | 1 hrs | 614 (17%) | Unnamed event |
| Mar 5, 2025 | 17 hrs | 542 (15%) | High Wind |
Over the 11 years from 2015 to 2025, Adair County recorded 177 distinct power outage events, averaging 1.6 hours per event.
The single worst outage on record in Adair County started June 30, 2024 (Thunderstorm Wind), lasting 1 hours and leaving up to 865 customers without power (23% of the county) at its peak.
June has historically been the worst month for outages in Adair County, with 28 events recorded during that month across the dataset.
Based on this history, Adair County earns a Reliability Grade of A, placing it in the 90th percentile nationally for grid reliability (higher percentile = more reliable).
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Read our mission →Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Adair County.
| County | Grade | National percentile |
|---|---|---|
| Cass County | A | 89th |
| Marion County | A | 89th |
| Dubuque County | A | 91st |
| Carroll County | A | 88th |
| Black Hawk County | A | 88th |
Most reliable counties in Iowa
The top 3 counties in Iowa by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Clay County | A | 97th |
| Emmet County | A | 95th |
| Bremer County | A | 94th |
Least reliable counties in Iowa
The bottom 3 counties in Iowa by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Marshall County | F | 6th |
| Tama County | F | 12th |
| Jasper County | F | 14th |
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 Adair County?
Between 2015 and 2025, Adair County recorded 177 outage events, averaging 1.6 hours each.
What is Adair County's reliability grade?
Adair County has a Reliability Grade of A, in the 90th national percentile.
What was the worst power outage in Adair County?
The worst outage on record started June 30, 2024 (Thunderstorm Wind), lasting 1 hours and affecting up to 865 customers.