Pinal 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 |
|---|---|---|---|
| Apr 23, 2024 | 4 hrs | 33,580 (22%) | Unnamed event |
| Jul 9, 2018 | 7 hrs | 16,371 (11%) | Drought |
| Jul 10, 2021 | 31 hrs | 15,541 (10%) | Drought |
| Jul 31, 2018 | 6 hrs | 12,044 (8%) | Drought |
| Jul 15, 2021 | 1 hrs | 11,485 (8%) | Drought |
Over the 11 years from 2015 to 2025, Pinal County recorded 1,163 distinct power outage events, averaging 2.1 hours per event.
The single worst outage on record in Pinal County started April 23, 2024, lasting 4 hours and leaving up to 33,580 customers without power (22% of the county) at its peak.
August has historically been the worst month for outages in Pinal County, with 188 events recorded during that month across the dataset.
Based on this history, Pinal County earns a Reliability Grade of B, placing it in the 74th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Pinal County's outage profile
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Similar counties in Arizona
Counties with the closest reliability grade and national percentile to Pinal County.
| County | Grade | National percentile |
|---|---|---|
| Santa Cruz County | B | 75th |
| Navajo County | B | 72nd |
| Coconino County | A | 86th |
| Pima County | A | 86th |
| Maricopa County | A | 86th |
FAQ
How often does power go out in Pinal County?
Between 2015 and 2025, Pinal County recorded 1,163 outage events, averaging 2.1 hours each.
What is Pinal County's reliability grade?
Pinal County has a Reliability Grade of B, in the 74th national percentile.
What was the worst power outage in Pinal County?
The worst outage on record started April 23, 2024, lasting 4 hours and affecting up to 33,580 customers.