Polk County Power Outage History
2015–2025 · Missouri
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 |
|---|---|---|---|
| Apr 21, 2022 | 5 hrs | 3,680 (14%) | Hail |
| Mar 20, 2022 | 2 hrs | 3,377 (13%) | Unnamed event |
| Mar 18, 2021 | 3 hrs | 3,342 (12%) | Flood |
| Jun 26, 2018 | 4 hrs | 3,335 (12%) | Thunderstorm Wind |
| Nov 12, 2015 | 0 hrs | 3,258 (12%) | Unnamed event |
Over the 11 years from 2015 to 2025, Polk County recorded 421 distinct power outage events, averaging 2.1 hours per event.
The single worst outage on record in Polk County started April 21, 2022 (Hail), lasting 5 hours and leaving up to 3,680 customers without power (14% of the county) at its peak.
June has historically been the worst month for outages in Polk County, with 53 events recorded during that month across the dataset.
Based on this history, Polk County earns a Reliability Grade of A, placing it in the 87th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Polk County's outage profile
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Similar counties in Missouri
Counties with the closest reliability grade and national percentile to Polk County.
| County | Grade | National percentile |
|---|---|---|
| Scott County | A | 87th |
| St. Charles County | A | 88th |
| Shelby County | A | 86th |
| Wright County | A | 86th |
| Randolph County | A | 86th |
FAQ
How often does power go out in Polk County?
Between 2015 and 2025, Polk County recorded 421 outage events, averaging 2.1 hours each.
What is Polk County's reliability grade?
Polk County has a Reliability Grade of A, in the 87th national percentile.
What was the worst power outage in Polk County?
The worst outage on record started April 21, 2022 (Hail), lasting 5 hours and affecting up to 3,680 customers.