Coconino County Power Outage History
2017–2025 · Arizona
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 |
|---|---|---|---|
| Nov 8, 2020 | 2 hrs | 71,189 (51%) | High Wind |
| Nov 29, 2019 | 49 hrs | 11,440 (8%) | Heavy Snow |
| Feb 22, 2023 | 43 hrs | 10,604 (8%) | Heavy Snow |
| Dec 24, 2021 | 28 hrs | 8,869 (6%) | Heavy Snow |
| Jun 26, 2022 | 4 hrs | 7,454 (5%) | Wildfire |
Over the 9 years from 2017 to 2025, Coconino County recorded 597 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Coconino County started November 8, 2020 (High Wind), lasting 2 hours and leaving up to 71,189 customers without power (51% of the county) at its peak.
July has historically been the worst month for outages in Coconino County, with 123 events recorded during that month across the dataset.
Based on this history, Coconino County earns a Reliability Grade of A, placing it in the 86th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Coconino County's outage profile
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Similar counties in Arizona
Counties with the closest reliability grade and national percentile to Coconino County.
| County | Grade | National percentile |
|---|---|---|
| Pima County | A | 86th |
| Maricopa County | A | 86th |
| Apache County | A | 87th |
| Yavapai County | A | 88th |
| Greenlee County | A | 89th |
FAQ
How often does power go out in Coconino County?
Between 2017 and 2025, Coconino County recorded 597 outage events, averaging 2.6 hours each.
What is Coconino County's reliability grade?
Coconino County has a Reliability Grade of A, in the 86th national percentile.
What was the worst power outage in Coconino County?
The worst outage on record started November 8, 2020 (High Wind), lasting 2 hours and affecting up to 71,189 customers.