County annual report · FIPS 06097
2023 Sonoma County, CA Power Outage Report
In 2023, customers in Sonoma County, CA went without power for an average of 10.7 hours, a total of 2.3M customer-hours (California average 7.9 hours). That ranks 28th worst of 57 California counties and 795th of 2,977 nationally.
Compared with CA, the US and 2022
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Sonoma County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 4, 2023 05:15 | January 10, 2023 01:00 | 5d 19h | 25,464 | 1.0M |
| 2 | July 16, 2023 00:00 | July 16, 2023 22:45 | 22h 45m | 11,546 | 15K |
| 3 | February 21, 2023 15:30 | March 3, 2023 06:00 | 9d 14h | 8,630 | 134K |
| 4 | January 10, 2023 12:45 | January 10, 2023 19:00 | 6h 15m | 7,719 | 30K |
| 5 | July 15, 2023 11:00 | July 15, 2023 23:15 | 12h 15m | 6,082 | 15K |
| 6 | July 17, 2023 12:00 | July 19, 2023 12:30 | 2d | 5,982 | 16K |
| 7 | January 11, 2023 01:30 | January 18, 2023 03:15 | 7d 1h | 5,911 | 144K |
| 8 | July 25, 2023 13:15 | July 27, 2023 07:15 | 1d 18h | 5,856 | 34K |
| 9 | September 15, 2023 15:30 | September 16, 2023 22:00 | 1d 6h | 5,751 | 21K |
| 10 | July 9, 2023 08:30 | July 9, 2023 21:00 | 12h 30m | 5,715 | 24K |
Outage episodes by size in 2023: 233 reached 100+ customers, 69 reached 1,000+ customers, 2 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Sonoma County reported on EIA Form 861 for 2023, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Pacific Gas & Electric Co. | 2023 | 11.9 hrs | 2.22 | 4.3 hrs | 1.56 |
| City of Healdsburg - (CA) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of California's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 214,127 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Sonoma County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Sonoma County, CA annual power outage report, 2023, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2023/california/sonoma-county