County annual report · FIPS 06013
2023 Contra Costa County, CA Power Outage Report
In 2023, customers in Contra Costa County, CA went without power for an average of 8.0 hours, a total of 3.9M customer-hours (California average 7.9 hours). That ranks 36th worst of 57 California counties and 1029th 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 Contra Costa 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 | March 13, 2023 13:30 | March 19, 2023 04:30 | 5d 15h | 80,988 | 1.0M |
| 2 | March 19, 2023 05:30 | April 1, 2023 13:30 | 13d 8h | 48,236 | 547K |
| 3 | June 26, 2023 13:45 | June 27, 2023 11:00 | 21h 15m | 28,815 | 11K |
| 4 | June 18, 2023 13:15 | June 23, 2023 10:15 | 4d 21h | 28,141 | 71K |
| 5 | January 1, 2023 00:00 | January 10, 2023 01:00 | 9d 1h | 22,013 | 458K |
| 6 | June 29, 2023 15:00 | July 6, 2023 11:00 | 6d 20h | 13,360 | 230K |
| 7 | October 28, 2023 08:30 | October 29, 2023 12:00 | 1d 3h | 9,879 | 34K |
| 8 | July 6, 2023 13:15 | July 11, 2023 09:15 | 4d 20h | 8,445 | 22K |
| 9 | February 18, 2023 19:45 | February 28, 2023 06:30 | 9d 10h | 8,284 | 124K |
| 10 | August 1, 2023 15:30 | August 20, 2023 05:45 | 18d 14h | 8,027 | 217K |
Outage episodes by size in 2023: 152 reached 100+ customers, 77 reached 1,000+ customers, 6 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 Contra Costa 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
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 ÷ 486,945 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. Contra Costa County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Contra Costa 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/contra-costa-county