County annual report · FIPS 06097
2020 Sonoma County, CA Power Outage Report
In 2020, customers in Sonoma County, CA went without power for an average of 18.9 hours, a total of 4.0M customer-hours (California average 6.3 hours). That ranks 18th worst of 57 California counties and 458th of 3,019 nationally.
Compared with CA, the US and 2019
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Sonoma County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 13, 2020 14:00 | September 20, 2020 05:15 | 37d 15h | 42,617 | 1.2M |
| 2 | October 9, 2020 07:45 | October 30, 2020 01:30 | 20d 17h | 31,277 | 1.2M |
| 3 | September 27, 2020 20:00 | October 9, 2020 07:00 | 11d 11h | 17,031 | 1.2M |
| 4 | December 1, 2020 00:00 | December 1, 2020 13:30 | 13h 30m | 11,692 | 37K |
| 5 | February 9, 2020 02:00 | February 12, 2020 04:00 | 3d 2h | 6,805 | 24K |
| 6 | March 29, 2020 12:00 | March 29, 2020 20:30 | 8h 30m | 6,516 | 13K |
| 7 | May 25, 2020 01:45 | May 25, 2020 11:00 | 9h 15m | 5,352 | 4,392 |
| 8 | December 15, 2020 01:15 | December 15, 2020 03:30 | 2h 15m | 4,177 | 4,230 |
| 9 | May 11, 2020 13:00 | May 12, 2020 04:15 | 15h 15m | 4,123 | 6,690 |
| 10 | November 5, 2020 08:45 | November 7, 2020 01:00 | 1d 16h | 4,087 | 9,963 |
Outage episodes by size in 2020: 215 reached 100+ customers, 50 reached 1,000+ customers, 4 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 2020, 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. | 2020 | 7.4 hrs | 1.34 | 2.3 hrs | 1.04 |
| 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 94% of California's customers in 2020; 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, 2020, 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/2020/california/sonoma-county