Madison County Power Outage History
2017–2025 · Idaho
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 8, 2020 | 26 hrs | 14,216 (64%) | Heat |
| Jun 12, 2021 | 5 hrs | 13,277 (59%) | Unnamed event |
| Sep 23, 2018 | 1 hrs | 13,037 (58%) | Unnamed event |
| Dec 8, 2018 | 4 hrs | 12,911 (58%) | Unnamed event |
| Nov 24, 2020 | 1 hrs | 11,853 (53%) | Unnamed event |
Over the 9 years from 2017 to 2025, Madison County recorded 488 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Madison County started September 8, 2020 (Heat), lasting 26 hours and leaving up to 14,216 customers without power (64% of the county) at its peak.
August has historically been the worst month for outages in Madison County, with 53 events recorded during that month across the dataset.
Based on this history, Madison County earns a Reliability Grade of B, placing it in the 72nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Madison County's outage profile
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Outage-prep kit
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Similar counties in Idaho
Counties with the closest reliability grade and national percentile to Madison County.
| County | Grade | National percentile |
|---|---|---|
| Gem County | B | 72nd |
| Lewis County | B | 73rd |
| Washington County | B | 68th |
| Teton County | B | 78th |
| Jefferson County | B | 64th |
FAQ
How often does power go out in Madison County?
Between 2017 and 2025, Madison County recorded 488 outage events, averaging 2.3 hours each.
What is Madison County's reliability grade?
Madison County has a Reliability Grade of B, in the 72nd national percentile.
What was the worst power outage in Madison County?
The worst outage on record started September 8, 2020 (Heat), lasting 26 hours and affecting up to 14,216 customers.