Madison County Power Outage History
2014–2025 · Iowa
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 |
|---|---|---|---|
| Mar 5, 2022 | 19 hrs | 1,887 (20%) | Tornado |
| Mar 5, 2025 | 21 hrs | 1,839 (20%) | Blizzard |
| Jan 5, 2023 | 0 hrs | 1,443 (15%) | Unnamed event |
| Apr 24, 2023 | 0 hrs | 1,420 (15%) | Heavy Rain |
| Aug 9, 2025 | 0 hrs | 1,296 (14%) | Unnamed event |
Over the 12 years from 2014 to 2025, Madison County recorded 279 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Madison County started March 5, 2022 (Tornado), lasting 19 hours and leaving up to 1,887 customers without power (20% of the county) at its peak.
June has historically been the worst month for outages in Madison County, with 40 events recorded during that month across the dataset.
Based on this history, Madison County earns a Reliability Grade of A, placing it in the 81st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Madison County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Madison County.
| County | Grade | National percentile |
|---|---|---|
| Clayton County | A | 80th |
| Clarke County | A | 80th |
| Cerro Gordo County | A | 80th |
| Lucas County | A | 82nd |
| Hamilton County | B | 80th |
FAQ
How often does power go out in Madison County?
Between 2014 and 2025, Madison County recorded 279 outage events, averaging 2.4 hours each.
What is Madison County's reliability grade?
Madison County has a Reliability Grade of A, in the 81st national percentile.
What was the worst power outage in Madison County?
The worst outage on record started March 5, 2022 (Tornado), lasting 19 hours and affecting up to 1,887 customers.