Navajo County Power Outage History
2015–2025 · Arizona
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 |
|---|---|---|---|
| Oct 12, 2019 | 3 hrs | 27,673 (32%) | Unnamed event |
| Nov 26, 2019 | 3 hrs | 16,259 (19%) | Heavy Snow |
| Jan 13, 2019 | 1 hrs | 15,978 (18%) | Heavy Snow |
| Jan 13, 2019 | 1 hrs | 15,976 (18%) | Heavy Snow |
| Jan 1, 2019 | 24 hrs | 15,960 (18%) | Heavy Snow |
Over the 11 years from 2015 to 2025, Navajo County recorded 580 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Navajo County started October 12, 2019, lasting 3 hours and leaving up to 27,673 customers without power (32% of the county) at its peak.
July has historically been the worst month for outages in Navajo County, with 99 events recorded during that month across the dataset.
Based on this history, Navajo County earns a Reliability Grade of B, placing it in the 72nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Navajo County's outage profile
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Outage-prep kit
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Similar counties in Arizona
Counties with the closest reliability grade and national percentile to Navajo County.
| County | Grade | National percentile |
|---|---|---|
| Pinal County | B | 74th |
| Santa Cruz County | B | 75th |
| Coconino County | A | 86th |
| Pima County | A | 86th |
| Maricopa County | A | 86th |
FAQ
How often does power go out in Navajo County?
Between 2015 and 2025, Navajo County recorded 580 outage events, averaging 2.2 hours each.
What is Navajo County's reliability grade?
Navajo County has a Reliability Grade of B, in the 72nd national percentile.
What was the worst power outage in Navajo County?
The worst outage on record started October 12, 2019, lasting 3 hours and affecting up to 27,673 customers.