El Dorado County Power Outage History
2017–2025 · 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 |
|---|---|---|---|
| Aug 24, 2022 | 3 hrs | 73,183 (75%) | Drought |
| Aug 15, 2020 | 4 hrs | 72,584 (74%) | Excessive Heat |
| Oct 28, 2019 | 2 hrs | 66,493 (68%) | Wildfire |
| Oct 28, 2019 | 3 hrs | 62,216 (63%) | Wildfire |
| Oct 28, 2019 | 1 hrs | 57,169 (58%) | Wildfire |
Over the 9 years from 2017 to 2025, El Dorado County recorded 1,832 distinct power outage events, averaging 5.2 hours per event.
The single worst outage on record in El Dorado County started August 24, 2022 (Drought), lasting 3 hours and leaving up to 73,183 customers without power (75% of the county) at its peak.
October has historically been the worst month for outages in El Dorado County, with 241 events recorded during that month across the dataset.
Based on this history, El Dorado County earns a Reliability Grade of F, placing it in the 2nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for El Dorado County's outage profile
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Similar counties in California
Counties with the closest reliability grade and national percentile to El Dorado County.
| County | Grade | National percentile |
|---|---|---|
| Lake County | F | 2nd |
| Nevada County | F | 2nd |
| Butte County | F | 1st |
| Tuolumne County | F | 1st |
| Alpine County | F | 2nd |
FAQ
How often does power go out in El Dorado County?
Between 2017 and 2025, El Dorado County recorded 1,832 outage events, averaging 5.2 hours each.
What is El Dorado County's reliability grade?
El Dorado County has a Reliability Grade of F, in the 2nd national percentile.
What was the worst power outage in El Dorado County?
The worst outage on record started August 24, 2022 (Drought), lasting 3 hours and affecting up to 73,183 customers.