Colusa County Power Outage History
2018–2025 · California
Worse than average — more frequent or longer 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 |
|---|---|---|---|
| Nov 25, 2025 | 4 hrs | 7,082 (71%) | Unnamed event |
| Oct 27, 2019 | 5 hrs | 5,612 (56%) | Unnamed event |
| Oct 3, 2025 | 6 hrs | 4,373 (44%) | Unnamed event |
| Nov 5, 2020 | 14 hrs | 4,322 (43%) | Drought |
| Sep 18, 2022 | 6 hrs | 4,265 (43%) | Drought |
Over the 8 years from 2018 to 2025, Colusa County recorded 520 distinct power outage events, averaging 3.7 hours per event.
The single worst outage on record in Colusa County started November 25, 2025, lasting 4 hours and leaving up to 7,082 customers without power (71% of the county) at its peak.
October has historically been the worst month for outages in Colusa County, with 98 events recorded during that month across the dataset.
Based on this history, Colusa County earns a Reliability Grade of D, placing it in the 28th 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 Colusa County.
| County | Grade | National percentile |
|---|---|---|
| Monterey County | D | 27th |
| Madera County | D | 27th |
| Placer County | D | 29th |
| Glenn County | D | 32nd |
| San Mateo County | D | 32nd |
FAQ
How often does power go out in Colusa County?
Between 2018 and 2025, Colusa County recorded 520 outage events, averaging 3.7 hours each.
What is Colusa County's reliability grade?
Colusa County has a Reliability Grade of D, in the 28th national percentile.
What was the worst power outage in Colusa County?
The worst outage on record started November 25, 2025, lasting 4 hours and affecting up to 7,082 customers.