Humboldt County Power Outage History
2018–2025 · California
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Dec 20, 2022 | 36 hrs | 71,791 (100%) | Unnamed event |
| Oct 27, 2019 | 5 hrs | 70,846 (99%) | Unnamed event |
| Oct 27, 2019 | 2 hrs | 70,846 (99%) | Unnamed event |
| Oct 27, 2019 | 2 hrs | 70,846 (99%) | Unnamed event |
| Oct 27, 2019 | 4 hrs | 70,846 (99%) | Unnamed event |
Over the 8 years from 2018 to 2025, Humboldt County recorded 1,495 distinct power outage events, averaging 5.0 hours per event.
The single worst outage on record in Humboldt County started December 20, 2022, lasting 36 hours and leaving up to 71,791 customers without power (100% of the county) at its peak.
January has historically been the worst month for outages in Humboldt County, with 153 events recorded during that month across the dataset.
Based on this history, Humboldt County earns a Reliability Grade of F, placing it in the 5th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Humboldt County's outage profile
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Similar counties in California
Counties with the closest reliability grade and national percentile to Humboldt County.
| County | Grade | National percentile |
|---|---|---|
| Mendocino County | F | 5th |
| Del Norte County | F | 6th |
| Santa Cruz County | F | 6th |
| Tehama County | F | 7th |
| Napa County | F | 7th |
FAQ
How often does power go out in Humboldt County?
Between 2018 and 2025, Humboldt County recorded 1,495 outage events, averaging 5.0 hours each.
What is Humboldt County's reliability grade?
Humboldt County has a Reliability Grade of F, in the 5th national percentile.
What was the worst power outage in Humboldt County?
The worst outage on record started December 20, 2022, lasting 36 hours and affecting up to 71,791 customers.