Imperial County Power Outage History
2015–2025 · California
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 16, 2022 | 8 hrs | 4,696 (6%) | Unnamed event |
| Oct 15, 2022 | 11 hrs | 4,696 (6%) | Unnamed event |
| Sep 19, 2025 | 52 hrs | 4,555 (6%) | Unnamed event |
| Jan 10, 2025 | 2 hrs | 3,749 (5%) | High Wind |
| Oct 7, 2022 | 14 hrs | 3,107 (4%) | Dust Storm |
Over the 11 years from 2015 to 2025, Imperial County recorded 101 distinct power outage events, averaging 14.3 hours per event.
The single worst outage on record in Imperial County started October 16, 2022, lasting 8 hours and leaving up to 4,696 customers without power (6% of the county) at its peak.
August has historically been the worst month for outages in Imperial County, with 20 events recorded during that month across the dataset.
Based on this history, Imperial County earns a Reliability Grade of B, placing it in the 75th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in California
Counties with the closest reliability grade and national percentile to Imperial County.
| County | Grade | National percentile |
|---|---|---|
| Modoc County | B | 75th |
| San Francisco County | B | 73rd |
| Kings County | B | 78th |
| Fresno County | B | 71st |
| Merced County | B | 70th |
FAQ
How often does power go out in Imperial County?
Between 2015 and 2025, Imperial County recorded 101 outage events, averaging 14.3 hours each.
What is Imperial County's reliability grade?
Imperial County has a Reliability Grade of B, in the 75th national percentile.
What was the worst power outage in Imperial County?
The worst outage on record started October 16, 2022, lasting 8 hours and affecting up to 4,696 customers.