County annual report · FIPS 06001
2023 Alameda County, CA Power Outage Report
In 2023, customers in Alameda County, CA went without power for an average of 5.7 hours, a total of 4.3M customer-hours (California average 7.9 hours). That ranks 40th worst of 57 California counties and 1332nd 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 Alameda 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 | September 9, 2023 09:15 | September 11, 2023 09:30 | 2d | 75,396 | 22K |
| 2 | March 19, 2023 05:30 | March 30, 2023 10:15 | 11d 4h | 57,857 | 1.4M |
| 3 | February 17, 2023 15:30 | February 26, 2023 17:00 | 9d 1h | 55,724 | 581K |
| 4 | March 13, 2023 06:30 | March 19, 2023 04:30 | 5d 22h | 33,951 | 444K |
| 5 | January 1, 2023 00:00 | January 10, 2023 01:00 | 9d 1h | 15,094 | 329K |
| 6 | October 1, 2023 17:00 | October 7, 2023 14:00 | 5d 21h | 12,876 | 57K |
| 7 | July 5, 2023 02:30 | July 8, 2023 13:00 | 3d 10h | 12,771 | 37K |
| 8 | May 26, 2023 16:15 | May 29, 2023 05:00 | 2d 12h | 12,759 | 18K |
| 9 | September 11, 2023 15:15 | September 13, 2023 12:30 | 1d 21h | 11,801 | 36K |
| 10 | July 23, 2023 09:15 | July 24, 2023 11:45 | 1d 2h | 10,298 | 31K |
Outage episodes by size in 2023: 120 reached 100+ customers, 70 reached 1,000+ customers, 10 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 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 |
| Alameda Municipal Power | 2023 | 7 min | 0.03 | 7 min | 0.03 |
| 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 n/a of California's customers in 2023; 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, 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/alameda-county