County annual report · FIPS 06001
2022 Alameda County, CA Power Outage Report
In 2022, customers in Alameda County, CA went without power for an average of 3.2 hours, a total of 2.4M customer-hours (California average 4.9 hours). That ranks 47th worst of 57 California counties and 1885th of 2,976 nationally.
Compared with CA, the US and 2021
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Alameda County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 16, 2022 15:00 | September 18, 2022 04:15 | 1d 13h | 78,293 | 62K |
| 2 | February 22, 2022 15:30 | February 26, 2022 12:15 | 3d 20h | 78,121 | 147K |
| 3 | January 19, 2022 15:30 | January 23, 2022 05:45 | 3d 14h | 34,852 | 413K |
| 4 | March 3, 2022 16:00 | March 5, 2022 11:15 | 1d 19h | 34,206 | 57K |
| 5 | August 21, 2022 06:00 | August 26, 2022 07:45 | 5d 1h | 24,950 | 48K |
| 6 | December 29, 2022 15:45 | January 1, 2023 00:00 | 2d 8h | 15,214 | 63K |
| 7 | September 5, 2022 15:00 | September 11, 2022 00:15 | 5d 9h | 13,917 | 161K |
| 8 | January 24, 2022 15:45 | January 26, 2022 07:15 | 1d 15h | 11,686 | 14K |
| 9 | July 7, 2022 14:30 | July 16, 2022 08:30 | 8d 18h | 8,550 | 52K |
| 10 | December 16, 2022 12:45 | December 17, 2022 07:15 | 18h 30m | 8,313 | 17K |
Outage episodes by size in 2022: 192 reached 100+ customers, 83 reached 1,000+ customers, 8 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 Alameda County reported on EIA Form 861 for 2022, 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. | 2022 | 5.4 hrs | 1.78 | 4.3 hrs | 1.63 |
| Alameda Municipal Power | 2022 | 12 min | 0.09 | 12 min | 0.09 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Port of Oakland | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of California's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 751,616 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. Alameda County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Alameda County, CA annual power outage report, 2022, 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/2022/california/alameda-county