Marin 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 28, 2019 | 2 hrs | 122,875 (100%) | Strong Wind |
| Oct 28, 2019 | 7 hrs | 122,875 (100%) | Strong Wind |
| Oct 28, 2019 | 3 hrs | 122,875 (100%) | Strong Wind |
| Oct 28, 2019 | 2 hrs | 122,875 (100%) | Strong Wind |
| Oct 28, 2019 | 1 hrs | 122,875 (100%) | Strong Wind |
Over the 8 years from 2018 to 2025, Marin County recorded 1,567 distinct power outage events, averaging 3.4 hours per event.
The single worst outage on record in Marin County started October 28, 2019 (Strong Wind), lasting 2 hours and leaving up to 122,875 customers without power (100% of the county) at its peak.
October has historically been the worst month for outages in Marin County, with 200 events recorded during that month across the dataset.
Based on this history, Marin County earns a Reliability Grade of F, placing it in the 16th 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 Marin County.
| County | Grade | National percentile |
|---|---|---|
| Inyo County | F | 16th |
| Yuba County | F | 15th |
| Sonoma County | F | 13th |
| Mono County | F | 19th |
| Siskiyou County | F | 20th |
FAQ
How often does power go out in Marin County?
Between 2018 and 2025, Marin County recorded 1,567 outage events, averaging 3.4 hours each.
What is Marin County's reliability grade?
Marin County has a Reliability Grade of F, in the 16th national percentile.
What was the worst power outage in Marin County?
The worst outage on record started October 28, 2019 (Strong Wind), lasting 2 hours and affecting up to 122,875 customers.