County annual report · FIPS 06013
2018 Contra Costa County, CA Power Outage Report
In 2018, customers in Contra Costa County, CA went without power for an average of 1.5 hours, a total of 707K customer-hours (California average 3.7 hours). That ranks 43rd worst of 57 California counties and 2109th of 2,798 nationally.
Compared with CA, the US and 2017
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Contra Costa County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 21, 2018 16:00 | November 24, 2018 15:15 | 2d 23h | 26,068 | 68K |
| 2 | August 27, 2018 14:30 | August 29, 2018 12:15 | 1d 21h | 7,983 | 20K |
| 3 | July 28, 2018 11:15 | July 29, 2018 02:30 | 15h 15m | 7,501 | 2,741 |
| 4 | November 28, 2018 16:30 | December 2, 2018 08:45 | 3d 16h | 6,923 | 20K |
| 5 | December 29, 2018 06:45 | December 30, 2018 06:00 | 23h 15m | 6,600 | 6,254 |
| 6 | November 20, 2018 15:45 | November 21, 2018 12:00 | 20h 15m | 6,533 | 20K |
| 7 | June 16, 2018 15:15 | June 18, 2018 08:45 | 1d 17h | 5,726 | 6,762 |
| 8 | October 6, 2018 14:15 | October 10, 2018 03:00 | 3d 12h | 5,681 | 15K |
| 9 | October 16, 2018 15:30 | October 19, 2018 10:45 | 2d 19h | 5,118 | 12K |
| 10 | September 26, 2018 13:45 | September 27, 2018 09:00 | 19h 15m | 4,878 | 3,419 |
Outage episodes by size in 2018: 145 reached 100+ customers, 58 reached 1,000+ customers, 1 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 2018, 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. | 2018 | 5.0 hrs | 1.18 | 2.1 hrs | 1.08 |
| 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 91% of California's customers in 2018; 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, 2018, 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/2018/california/contra-costa-county