Calaveras 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 |
|---|---|---|---|
| Oct 27, 2019 | 1 hrs | 32,384 (100%) | Wildfire |
| Oct 27, 2019 | 2 hrs | 32,384 (100%) | Wildfire |
| Oct 27, 2019 | 2 hrs | 32,021 (99%) | Wildfire |
| Oct 27, 2019 | 4 hrs | 32,021 (99%) | Wildfire |
| Oct 27, 2019 | 5 hrs | 32,021 (99%) | Wildfire |
Over the 8 years from 2018 to 2025, Calaveras County recorded 1,353 distinct power outage events, averaging 4.6 hours per event.
The single worst outage on record in Calaveras County started October 27, 2019 (Wildfire), lasting 1 hours and leaving up to 32,384 customers without power (100% of the county) at its peak.
October has historically been the worst month for outages in Calaveras County, with 201 events recorded during that month across the dataset.
Based on this history, Calaveras County earns a Reliability Grade of F, placing it in the 1st 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 Calaveras County.
| County | Grade | National percentile |
|---|---|---|
| Amador County | F | 1st |
| Mariposa County | F | 1st |
| Plumas County | F | 1st |
| Tuolumne County | F | 1st |
| Butte County | F | 1st |
FAQ
How often does power go out in Calaveras County?
Between 2018 and 2025, Calaveras County recorded 1,353 outage events, averaging 4.6 hours each.
What is Calaveras County's reliability grade?
Calaveras County has a Reliability Grade of F, in the 1st national percentile.
What was the worst power outage in Calaveras County?
The worst outage on record started October 27, 2019 (Wildfire), lasting 1 hours and affecting up to 32,384 customers.